merge

Originally committed as revision 6 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 2079 insertions, 0 deletions

diff --git a/ffmpeg.c b/ffmpeg.c
new file mode 100644
index 0000000000..d5bc917a42
--- /dev/null
+++ b/ffmpeg.c
@@ -0,0 +1,2079 @@
+/*
+ * FFmpeg main 
+ * Copyright (c) 2000,2001 Gerard Lantau
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+#include <sys/time.h>
+#include <string.h>
+#include <sys/poll.h>
+#include <termios.h>
+#include <ctype.h>
+
+#include "avformat.h"
+
+typedef struct {
+    const char *name;
+    int flags;
+#define HAS_ARG    0x0001
+#define OPT_BOOL   0x0002
+#define OPT_EXPERT 0x0004
+#define OPT_STRING 0x0008
+    union {
+        void (*func_arg)();
+        int *int_arg;
+        char **str_arg;
+    } u;
+    const char *help;
+    const char *argname;
+} OptionDef;
+
+/* select an input stream for an output stream */
+typedef struct AVStreamMap {
+    int file_index;
+    int stream_index;
+} AVStreamMap;
+
+extern const OptionDef options[];
+
+void show_help(void);
+
+#define MAX_FILES 20
+
+static AVFormatContext *input_files[MAX_FILES];
+static int nb_input_files = 0;
+
+static AVFormatContext *output_files[MAX_FILES];
+static int nb_output_files = 0;
+
+static AVStreamMap stream_maps[MAX_FILES];
+static int nb_stream_maps;
+
+static AVFormat *file_format;
+static int frame_width  = 160;
+static int frame_height = 128;
+static int frame_rate = 25 * FRAME_RATE_BASE;
+static int video_bit_rate = 200000;
+static int video_qscale = 0;
+static int video_disable = 0;
+static int video_codec_id = CODEC_ID_NONE;
+static int same_quality = 0;
+
+static int gop_size = 12;
+static int intra_only = 0;
+static int audio_sample_rate = 44100;
+static int audio_bit_rate = 64000;
+static int audio_disable = 0;
+static int audio_channels = 1;
+static int audio_codec_id = CODEC_ID_NONE;
+
+static INT64 recording_time = 0;
+static int file_overwrite = 0;
+static char *str_title = NULL;
+static char *str_author = NULL;
+static char *str_copyright = NULL;
+static char *str_comment = NULL;
+
+typedef struct AVOutputStream {
+    int file_index;          /* file index */
+    int index;               /* stream index in the output file */
+    int source_index;        /* AVInputStream index */
+    AVStream *st;            /* stream in the output file */
+    int encoding_needed;   /* true if encoding needed for this stream */
+
+    int fifo_packet_rptr;    /* read index in the corresponding
+                                avinputstream packet fifo */
+    /* video only */
+    AVPicture pict_tmp;         /* temporary image for resizing */
+    int video_resample;
+    ImgReSampleContext *img_resample_ctx; /* for image resampling */
+    
+    /* audio only */
+    int audio_resample;
+    ReSampleContext *resample; /* for audio resampling */
+    FifoBuffer fifo;     /* for compression: one audio fifo per codec */
+} AVOutputStream;
+
+typedef struct AVInputStream {
+    int file_index;
+    int index;
+    AVStream *st;
+    int discard;             /* true if stream data should be discarded */
+    int decoding_needed;     /* true if the packets must be decoded in 'raw_fifo' */
+    INT64 pts;               /* current pts */
+    int frame_number;        /* current frame */
+    INT64 sample_index;      /* current sample */
+} AVInputStream;
+
+typedef struct AVInputFile {
+    int eof_reached;      /* true if eof reached */
+    int ist_index;        /* index of first stream in ist_table */
+    int buffer_size;      /* current total buffer size */
+    int buffer_size_max;  /* buffer size at which we consider we can stop
+                             buffering */
+} AVInputFile;
+
+/* init terminal so that we can grab keys */
+static struct termios oldtty;
+
+static void term_exit(void)
+{
+    tcsetattr (0, TCSANOW, &oldtty);
+}
+
+static void term_init(void)
+{
+    struct termios tty;
+
+    tcgetattr (0, &tty);
+    oldtty = tty;
+
+    tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
+                          |INLCR|IGNCR|ICRNL|IXON);
+    tty.c_oflag |= OPOST;
+    tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
+    tty.c_cflag &= ~(CSIZE|PARENB);
+    tty.c_cflag |= CS8;
+    tty.c_cc[VMIN] = 1;
+    tty.c_cc[VTIME] = 0;
+    
+    tcsetattr (0, TCSANOW, &tty);
+
+    atexit(term_exit);
+}
+
+/* read a key without blocking */
+static int read_key(void)
+{
+    struct timeval tv;
+    int n;
+    unsigned char ch;
+    fd_set rfds;
+
+    FD_ZERO(&rfds);
+    FD_SET(0, &rfds);
+    tv.tv_sec = 0;
+    tv.tv_usec = 0;
+    n = select(1, &rfds, NULL, NULL, &tv);
+    if (n > 0) {
+        if (read(0, &ch, 1) == 1)
+            return ch;
+    }
+    return -1;
+}
+
+#define AUDIO_FIFO_SIZE 8192
+
+/* main loop for grabbing */
+int av_grab(AVFormatContext *s)
+{
+    UINT8 audio_buf[AUDIO_FIFO_SIZE/2];
+    UINT8 audio_buf1[AUDIO_FIFO_SIZE/2];
+    UINT8 audio_out[AUDIO_FIFO_SIZE/2];
+    UINT8 video_buffer[128*1024];
+    char buf[256];
+    short *samples;
+    URLContext *audio_handle = NULL, *video_handle = NULL;
+    int ret;
+    AVCodecContext *enc, *first_video_enc = NULL;
+    int frame_size, frame_bytes;
+    int use_audio, use_video;
+    int frame_rate, sample_rate, channels;
+    int width, height, frame_number, i, pix_fmt = 0;
+    AVOutputStream *ost_table[s->nb_streams], *ost;
+    UINT8 *picture_in_buf = NULL, *picture_420p = NULL;
+    int audio_fifo_size = 0, picture_size = 0;
+    INT64 time_start;
+
+    /* init output stream info */
+    for(i=0;i<s->nb_streams;i++)
+        ost_table[i] = NULL;
+
+    /* output stream init */
+    for(i=0;i<s->nb_streams;i++) {
+        ost = av_mallocz(sizeof(AVOutputStream));
+        if (!ost)
+            goto fail;
+        ost->index = i;
+        ost->st = s->streams[i];
+        ost_table[i] = ost;
+    }
+
+    use_audio = 0;
+    use_video = 0;
+    frame_rate = 0;
+    sample_rate = 0;
+    frame_size = 0;
+    channels = 1;
+    width = 0;
+    height = 0;
+    frame_number = 0;
+    
+    for(i=0;i<s->nb_streams;i++) {
+        AVCodec *codec;
+
+        ost = ost_table[i];
+        enc = &ost->st->codec;
+        codec = avcodec_find_encoder(enc->codec_id);
+        if (!codec) {
+            fprintf(stderr, "Unknown codec\n");
+            return -1;
+        }
+        if (avcodec_open(enc, codec) < 0) {
+            fprintf(stderr, "Incorrect encode parameters\n");
+            return -1;
+        }
+        switch(enc->codec_type) {
+        case CODEC_TYPE_AUDIO:
+            use_audio = 1;
+            if (enc->sample_rate > sample_rate)
+                sample_rate = enc->sample_rate;
+            if (enc->frame_size > frame_size)
+                frame_size = enc->frame_size;
+            if (enc->channels > channels)
+                channels = enc->channels;
+            break;
+        case CODEC_TYPE_VIDEO:
+            if (!first_video_enc)
+                first_video_enc = enc;
+            use_video = 1;
+            if (enc->frame_rate > frame_rate)
+                frame_rate = enc->frame_rate;
+            if (enc->width > width)
+                width = enc->width;
+            if (enc->height > height)
+                height = enc->height;
+            break;
+        }
+    }
+
+    /* audio */
+    samples = NULL;
+    if (use_audio) {
+        snprintf(buf, sizeof(buf), "audio:%d,%d", sample_rate, channels);
+        ret = url_open(&audio_handle, buf, URL_RDONLY);
+        if (ret < 0) {
+            fprintf(stderr, "Could not open audio device: disabling audio capture\n");
+            use_audio = 0;
+        } else {
+            URLFormat f;
+            /* read back exact grab parameters */
+            if (url_getformat(audio_handle, &f) < 0) {
+                fprintf(stderr, "could not read back video grab parameters\n");
+                goto fail;
+            }
+            sample_rate = f.sample_rate;
+            channels = f.channels;
+            audio_fifo_size = ((AUDIO_FIFO_SIZE / 2) / audio_handle->packet_size) * 
+                audio_handle->packet_size;
+            fprintf(stderr, "Audio sampling: %d Hz, %s\n", 
+                    sample_rate, channels == 2 ? "stereo" : "mono");
+        }
+    }
+    
+    /* video */
+    if (use_video) {
+        snprintf(buf, sizeof(buf), "video:%d,%d,%f", 
+                 width, height, (float)frame_rate / FRAME_RATE_BASE);
+
+        ret = url_open(&video_handle, buf, URL_RDONLY);
+        if (ret < 0) {
+            fprintf(stderr,"Could not init video 4 linux capture: disabling video capture\n");
+            use_video = 0;
+        } else {
+            URLFormat f;
+            const char *pix_fmt_str;
+            /* read back exact grab parameters */
+            if (url_getformat(video_handle, &f) < 0) {
+                fprintf(stderr, "could not read back video grab parameters\n");
+                goto fail;
+            }
+            width = f.width;
+            height = f.height;
+            pix_fmt = f.pix_fmt;
+            switch(pix_fmt) {
+            case PIX_FMT_YUV420P:
+                pix_fmt_str = "420P";
+                break;
+            case PIX_FMT_YUV422:
+                pix_fmt_str = "422";
+                break;
+            case PIX_FMT_RGB24:
+                pix_fmt_str = "RGB24";
+                break;
+            case PIX_FMT_BGR24:
+                pix_fmt_str = "BGR24";
+                break;
+            default:
+                pix_fmt_str = "???";
+                break;
+            }
+            picture_size = video_handle->packet_size;
+            picture_in_buf = malloc(picture_size);
+            if (!picture_in_buf)
+                goto fail;
+            /* allocate a temporary picture if not grabbing in 420P format */
+            if (pix_fmt != PIX_FMT_YUV420P) {
+                picture_420p = malloc((width * height * 3) / 2);
+            }
+            fprintf(stderr, "Video sampling: %dx%d, %s format, %0.2f fps\n", 
+                    width, height, pix_fmt_str, (float)frame_rate / FRAME_RATE_BASE);
+        }
+    }
+
+    if (!use_video && !use_audio) {
+        fprintf(stderr,"Could not open grab devices : exiting\n");
+        exit(1);
+    }
+
+    /* init built in conversion functions */
+    for(i=0;i<s->nb_streams;i++) {
+        ost = ost_table[i];
+        enc = &ost->st->codec;
+        switch(enc->codec_type) {
+        case CODEC_TYPE_AUDIO:
+            ost->audio_resample = 0;
+            if ((enc->channels != channels ||
+                 enc->sample_rate != sample_rate)) {
+                ost->audio_resample = 1;
+                ost->resample = audio_resample_init(enc->channels, channels,
+                                                    enc->sample_rate, sample_rate);
+            }
+            if (fifo_init(&ost->fifo, (2 * audio_fifo_size * enc->sample_rate) / 
+                          sample_rate))
+                goto fail;
+            break;
+        case CODEC_TYPE_VIDEO:
+            ost->video_resample = 0;
+            if (enc->width != width ||
+                enc->height != height) {
+                UINT8 *buf;
+                ost->video_resample = 1;
+                buf = malloc((enc->width * enc->height * 3) / 2);
+                if (!buf)
+                    goto fail;
+                ost->pict_tmp.data[0] = buf;
+                ost->pict_tmp.data[1] = buf + enc->width * height;
+                ost->pict_tmp.data[2] = ost->pict_tmp.data[1] + (enc->width * height) / 4;
+                ost->pict_tmp.linesize[0] = enc->width;
+                ost->pict_tmp.linesize[1] = enc->width / 2;
+                ost->pict_tmp.linesize[2] = enc->width / 2;
+                ost->img_resample_ctx = img_resample_init(
+                                  ost->st->codec.width, ost->st->codec.height,
+                                  width, height);
+            }
+        }
+    }
+
+    fprintf(stderr, "Press [q] to stop encoding\n");
+
+    s->format->write_header(s);
+    time_start = gettime();
+    term_init();
+    
+    for(;;) {
+        /* if 'q' pressed, exits */
+        if (read_key() == 'q')
+            break;
+
+        /* read & compress audio frames */
+        if (use_audio) {
+            int ret, nb_samples, nb_samples_out;
+            UINT8 *buftmp;
+
+            for(;;) {
+                ret = url_read(audio_handle, audio_buf, audio_fifo_size);
+                if (ret <= 0)
+                    break;
+                /* fill each codec fifo by doing the right sample
+                   rate conversion. This is not optimal because we
+                   do too much work, but it is easy to do */
+                nb_samples = ret / (channels * 2);
+                for(i=0;i<s->nb_streams;i++) {
+                    ost = ost_table[i];
+                    enc = &ost->st->codec;
+                    if (enc->codec_type == CODEC_TYPE_AUDIO) {
+                        /* rate & stereo convertion */
+                        if (!ost->audio_resample) {
+                            buftmp = audio_buf;
+                            nb_samples_out = nb_samples;
+                        } else {
+                            buftmp = audio_buf1;
+                            nb_samples_out = audio_resample(ost->resample, 
+                                                            (short *)buftmp, (short *)audio_buf,
+                                                            nb_samples);
+                        }
+                        fifo_write(&ost->fifo, buftmp, nb_samples_out * enc->channels * 2, 
+                                   &ost->fifo.wptr);
+                    }
+                }
+                
+                /* compress as many frame as possible with each audio codec */
+                for(i=0;i<s->nb_streams;i++) {
+                    ost = ost_table[i];
+                    enc = &ost->st->codec;
+                    if (enc->codec_type == CODEC_TYPE_AUDIO) {
+                        frame_bytes = enc->frame_size * 2 * enc->channels;
+                        
+                        while (fifo_read(&ost->fifo, audio_buf, 
+                                         frame_bytes, &ost->fifo.rptr) == 0) {
+                            ret = avcodec_encode_audio(enc,
+                                                       audio_out, sizeof(audio_out), 
+                                                       (short *)audio_buf);
+                            s->format->write_packet(s, ost->index, audio_out, ret);
+                        }
+                    }
+                }
+            }
+        }
+
+        if (use_video) {
+            AVPicture *picture1;
+            AVPicture picture;
+            UINT8 *pict_buffer;
+
+            ret = url_read(video_handle, picture_in_buf, picture_size);
+            if (ret < 0)
+                break;
+            if (pix_fmt != PIX_FMT_YUV420P) {
+                pict_buffer = picture_420p;
+                img_convert_to_yuv420(pict_buffer, picture_in_buf, pix_fmt, width, height);
+            } else {
+                pict_buffer = picture_in_buf;
+            }
+            /* build a picture storage */
+            picture.data[0] = pict_buffer;
+            picture.data[1] = picture.data[0] + width * height;
+            picture.data[2] = picture.data[1] + (width * height) / 4;
+            picture.linesize[0] = width;
+            picture.linesize[1] = width / 2;
+            picture.linesize[2] = width / 2;
+            
+            for(i=0;i<s->nb_streams;i++) {
+                ost = ost_table[i];
+                enc = &ost->st->codec;
+                if (enc->codec_type == CODEC_TYPE_VIDEO) {
+                    int n1, n2, nb;
+
+                    /* feed each codec with its requested frame rate */
+                    n1 = ((INT64)frame_number * enc->frame_rate) / frame_rate;
+                    n2 = (((INT64)frame_number + 1) * enc->frame_rate) / frame_rate;
+                    nb = n2 - n1;
+                    if (nb > 0) {
+                        /* resize the picture if needed */
+                        if (ost->video_resample) {
+                            picture1 = &ost->pict_tmp;
+                            img_resample(ost->img_resample_ctx, 
+                                         picture1, &picture);
+                        } else {
+                            picture1 = &picture;
+                        }
+                        ret = avcodec_encode_video(enc, video_buffer, 
+                                                   sizeof(video_buffer), 
+                                                   picture1);
+                        s->format->write_packet(s, ost->index, video_buffer, ret);
+                    }
+                }
+            }
+            frame_number++;
+        }
+        
+        /* write report */
+        {
+            char buf[1024];
+            INT64 total_size;
+            float ti, bitrate;
+            static float last_ti;
+            INT64 ti1;
+
+            total_size = url_ftell(&s->pb);
+            ti1 = gettime() - time_start;
+            /* check elapsed time */
+            if (recording_time && ti1 >= recording_time)
+                break;
+
+            ti = ti1 / 1000000.0;
+            if (ti < 0.1)
+                ti = 0.1;
+            /* dispaly twice per second */
+            if ((ti - last_ti) >= 0.5) {
+                last_ti = ti;
+                bitrate = (int)((total_size * 8) / ti / 1000.0);
+                
+                buf[0] = '\0';
+                if (use_video) {
+                    sprintf(buf + strlen(buf), "frame=%5d fps=%4.1f q=%2d ",
+                            frame_number, (float)frame_number / ti, first_video_enc->quality);
+                }
+                
+                sprintf(buf + strlen(buf), "size=%8LdkB time=%0.1f bitrate=%6.1fkbits/s", 
+                        total_size / 1024, ti, bitrate);
+                fprintf(stderr, "%s    \r", buf);
+                fflush(stderr);
+            }
+        }
+    }
+    term_exit();
+
+    for(i=0;i<s->nb_streams;i++) {
+        ost = ost_table[i];
+        enc = &ost->st->codec;
+        avcodec_close(enc);
+    }
+    s->format->write_trailer(s);
+    
+    if (audio_handle)
+        url_close(audio_handle);
+
+    if (video_handle)
+        url_close(video_handle);
+
+    /* write report */
+    {
+        float ti, bitrate;
+        INT64 total_size;
+
+        total_size = url_ftell(&s->pb);
+
+        ti = (gettime() - time_start) / 1000000.0;
+        if (ti < 0.1)
+            ti = 0.1;
+        bitrate = (int)((total_size * 8) / ti / 1000.0);
+
+        fprintf(stderr, "\033[K\nTotal time = %0.1f s, %Ld KBytes, %0.1f kbits/s\n", 
+                ti, total_size / 1024, bitrate);
+        if (use_video) {
+            fprintf(stderr, "Total frames = %d\n", frame_number);
+        }
+    }
+
+    ret = 0;
+ fail1:
+    if (picture_in_buf)
+        free(picture_in_buf);
+    if (picture_420p)
+        free(picture_420p);
+    for(i=0;i<s->nb_streams;i++) {
+        ost = ost_table[i];
+        if (ost) {
+            if (ost->fifo.buffer)
+                fifo_free(&ost->fifo);
+            if (ost->pict_tmp.data[0])
+                free(ost->pict_tmp.data[0]);
+            if (ost->video_resample)
+                img_resample_close(ost->img_resample_ctx);
+            if (ost->audio_resample)
+                audio_resample_close(ost->resample);
+            free(ost);
+        }
+    }
+    return ret;
+ fail:
+    ret = -ENOMEM;
+    goto fail1;
+}
+
+int read_ffserver_streams(AVFormatContext *s, const char *filename)
+{
+    int i;
+    AVFormatContext *ic;
+
+    ic = av_open_input_file(filename, FFM_PACKET_SIZE);
+    if (!ic)
+        return -EIO;
+    /* copy stream format */
+    s->nb_streams = ic->nb_streams;
+    for(i=0;i<ic->nb_streams;i++) {
+        AVStream *st;
+        st = av_mallocz(sizeof(AVFormatContext));
+        memcpy(st, ic->streams[i], sizeof(AVStream));
+        s->streams[i] = st;
+    }
+
+    av_close_input_file(ic);
+    return 0;
+}
+
+#define MAX_AUDIO_PACKET_SIZE 16384
+
+static void do_audio_out(AVFormatContext *s, 
+                         AVOutputStream *ost, 
+                         AVInputStream *ist,
+                         unsigned char *buf, int size)
+{
+    UINT8 *buftmp;
+    UINT8 audio_buf[2*MAX_AUDIO_PACKET_SIZE]; /* XXX: allocate it */
+    UINT8 audio_out[MAX_AUDIO_PACKET_SIZE]; /* XXX: allocate it */
+    int size_out, frame_bytes, ret;
+    AVCodecContext *enc;
+
+    enc = &ost->st->codec;
+
+    if (ost->audio_resample) {
+        buftmp = audio_buf;
+        size_out = audio_resample(ost->resample, 
+                                  (short *)buftmp, (short *)buf,
+                                  size / (ist->st->codec.channels * 2));
+        size_out = size_out * enc->channels * 2;
+    } else {
+        buftmp = buf;
+        size_out = size;
+    }
+
+    /* now encode as many frames as possible */
+    if (enc->codec_id != CODEC_ID_PCM) {
+        /* output resampled raw samples */
+        fifo_write(&ost->fifo, buftmp, size_out, 
+                   &ost->fifo.wptr);
+
+        frame_bytes = enc->frame_size * 2 * enc->channels;
+        
+        while (fifo_read(&ost->fifo, audio_buf, frame_bytes, 
+                     &ost->fifo.rptr) == 0) {
+            ret = avcodec_encode_audio(enc,
+                                       audio_out, sizeof(audio_out), (short *)audio_buf);
+            s->format->write_packet(s, ost->index, audio_out, ret);
+        }
+    } else {
+        /* XXX: handle endianness */
+        s->format->write_packet(s, ost->index, buftmp, size_out);
+    }
+}
+
+/* write a picture to a raw mux */
+static void write_picture(AVFormatContext *s, int index, AVPicture *picture, int w, int h)
+{
+    UINT8 *buf, *src, *dest;
+    int size, j, i;
+    /* XXX: not efficient, should add test if we can take
+       directly the AVPicture */
+    size = (w * h) * 3 / 2; 
+    buf = malloc(size);
+    dest = buf;
+    for(i=0;i<3;i++) {
+        if (i == 1) {
+            w >>= 1;
+            h >>= 1;
+        }
+        src = picture->data[i];
+        for(j=0;j<h;j++) {
+            memcpy(dest, src, w);
+            dest += w;
+            src += picture->linesize[i];
+        }
+    }
+    s->format->write_packet(s, index, buf, size);
+    free(buf);
+}
+
+
+static void do_video_out(AVFormatContext *s, 
+                         AVOutputStream *ost, 
+                         AVInputStream *ist,
+                         AVPicture *pict)
+{
+    int n1, n2, nb, i, ret, frame_number;
+    AVPicture *picture;
+    UINT8 video_buffer[128*1024];
+    AVCodecContext *enc;
+
+    enc = &ost->st->codec;
+
+    frame_number = ist->frame_number;
+    /* first drop frame if needed */
+    n1 = ((INT64)frame_number * enc->frame_rate) / ist->st->codec.frame_rate;
+    n2 = (((INT64)frame_number + 1) * enc->frame_rate) / ist->st->codec.frame_rate;
+    nb = n2 - n1;
+    if (nb <= 0)
+        return;
+    
+    if (ost->video_resample) {
+        picture = &ost->pict_tmp;
+        img_resample(ost->img_resample_ctx, picture, pict);
+    } else {
+        picture = pict;
+    }
+
+    /* duplicates frame if needed */
+    /* XXX: pb because no interleaving */
+    for(i=0;i<nb;i++) {
+        if (enc->codec_id != CODEC_ID_RAWVIDEO) {
+            /* handles sameq here. This is not correct because it may
+               not be a global option */
+            if (same_quality) {
+                ost->st->codec.quality = ist->st->codec.quality;
+            }
+            ret = avcodec_encode_video(&ost->st->codec, 
+                                       video_buffer, sizeof(video_buffer), 
+                                       picture);
+            s->format->write_packet(s, ost->index, video_buffer, ret);
+        } else {
+            write_picture(s, ost->index, picture, enc->width, enc->height);
+        }
+    }
+}
+
+//#define HEX_DUMP
+
+#ifdef HEX_DUMP
+static void hex_dump(UINT8 *buf, int size)
+{
+    int len, i, j, c;
+
+    for(i=0;i<size;i+=16) {
+        len = size - i;
+        if (len > 16)
+            len = 16;
+        printf("%08x ", i);
+        for(j=0;j<16;j++) {
+            if (j < len)
+                printf(" %02x", buf[i+j]);
+            else
+                printf("   ");
+        }
+        printf(" ");
+        for(j=0;j<len;j++) {
+            c = buf[i+j];
+            if (c < ' ' || c > '~')
+                c = '.';
+            printf("%c", c);
+        }
+        printf("\n");
+    }
+}
+#endif
+
+/*
+ * The following code is the main loop of the file converter
+ */
+static int av_encode(AVFormatContext **output_files,
+                     int nb_output_files,
+                     AVFormatContext **input_files,
+                     int nb_input_files,
+                     AVStreamMap *stream_maps, int nb_stream_maps)
+{
+    int ret, i, j, k, n, nb_istreams, nb_ostreams = 0;
+    AVFormatContext *is, *os;
+    AVCodecContext *codec, *icodec;
+    AVOutputStream *ost, **ost_table = NULL;
+    AVInputStream *ist, **ist_table = NULL;
+    INT64 min_pts, start_time;
+    AVInputFile file_table[nb_input_files];
+
+    memset(file_table, 0, sizeof(file_table));
+    
+    /* input stream init */
+    j = 0;
+    for(i=0;i<nb_input_files;i++) {
+        is = input_files[i];
+        file_table[i].ist_index = j;
+        j += is->nb_streams;
+    }
+    nb_istreams = j;
+
+    ist_table = av_mallocz(nb_istreams * sizeof(AVInputStream *));
+    if (!ist_table)
+        return -ENOMEM;
+    
+    for(i=0;i<nb_istreams;i++) {
+        ist = av_mallocz(sizeof(AVInputStream));
+        if (!ist)
+            goto fail;
+        ist_table[i] = ist;
+    }
+    j = 0;
+    for(i=0;i<nb_input_files;i++) {
+        is = input_files[i];
+        for(k=0;k<is->nb_streams;k++) {
+            ist = ist_table[j++];
+            ist->st = is->streams[k];
+            ist->file_index = i;
+            ist->index = k;
+            ist->discard = 1; /* the stream is discarded by default
+                                 (changed later) */
+        }
+    }
+
+    /* output stream init */
+    nb_ostreams = 0;
+    for(i=0;i<nb_output_files;i++) {
+        os = output_files[i];
+        nb_ostreams += os->nb_streams;
+    }
+    if (nb_stream_maps > 0 && nb_stream_maps != nb_ostreams) {
+        fprintf(stderr, "Number of stream maps must match number of output streams\n");
+        exit(1);
+    }
+
+    ost_table = av_mallocz(sizeof(AVOutputStream *) * nb_ostreams);
+    if (!ost_table)
+        goto fail;
+    for(i=0;i<nb_ostreams;i++) {
+        ost = av_mallocz(sizeof(AVOutputStream));
+        if (!ost)
+            goto fail;
+        ost_table[i] = ost;
+    }
+    
+    n = 0;
+    for(k=0;k<nb_output_files;k++) {
+        os = output_files[k];
+        for(i=0;i<os->nb_streams;i++) {
+            int found;
+            ost = ost_table[n++];
+            ost->file_index = k;
+            ost->index = i;
+            ost->st = os->streams[i];
+            if (nb_stream_maps > 0) {
+                ost->source_index = file_table[stream_maps[n-1].file_index].ist_index + 
+                    stream_maps[n-1].stream_index;
+            } else {
+                /* get corresponding input stream index : we select the first one with the right type */
+                found = 0;
+                for(j=0;j<nb_istreams;j++) {
+                    ist = ist_table[j];
+                    if (ist->discard && 
+                        ist->st->codec.codec_type == ost->st->codec.codec_type) {
+                        ost->source_index = j;
+                        found = 1;
+                    }
+                }
+                
+                if (!found) {
+                    /* try again and reuse existing stream */
+                    for(j=0;j<nb_istreams;j++) {
+                        ist = ist_table[j];
+                        if (ist->st->codec.codec_type == ost->st->codec.codec_type) {
+                            ost->source_index = j;
+                            found = 1;
+                        }
+                    }
+                    if (!found) {
+                        fprintf(stderr, "Could not find input stream matching output stream #%d.%d\n",
+                                ost->file_index, ost->index);
+                        exit(1);
+                    }
+                }
+            }
+            ist = ist_table[ost->source_index];
+            ist->discard = 0;
+        }
+    }
+
+    /* dump the stream mapping */
+    fprintf(stderr, "Stream mapping:\n");
+    for(i=0;i<nb_ostreams;i++) {
+        ost = ost_table[i];
+        fprintf(stderr, "  Stream #%d.%d -> #%d.%d\n",
+                ist_table[ost->source_index]->file_index,
+                ist_table[ost->source_index]->index,
+                ost->file_index, 
+                ost->index);
+    }
+
+    /* for each output stream, we compute the right encoding parameters */
+    for(i=0;i<nb_ostreams;i++) {
+        ost = ost_table[i];
+        ist = ist_table[ost->source_index];
+
+        codec = &ost->st->codec;
+        icodec = &ist->st->codec;
+
+        switch(codec->codec_type) {
+        case CODEC_TYPE_AUDIO:
+            /* check if same codec with same parameters. If so, no
+               reencoding is needed */
+            if (codec->codec_id == icodec->codec_id &&
+                codec->bit_rate == icodec->bit_rate &&
+                codec->sample_rate == icodec->sample_rate &&
+                codec->channels == icodec->channels) {
+                /* no reencoding */
+            } else {
+                if (fifo_init(&ost->fifo, 2 * MAX_AUDIO_PACKET_SIZE))
+                    goto fail;
+
+                if (codec->channels == icodec->channels &&
+                    codec->sample_rate == icodec->sample_rate) {
+                    ost->audio_resample = 0;
+                } else {
+                    ost->audio_resample = 1;
+                    ost->resample = audio_resample_init(codec->channels, icodec->channels,
+                                                        codec->sample_rate, 
+                                                        icodec->sample_rate);
+                }
+                ist->decoding_needed = 1;
+                ost->encoding_needed = 1;
+            }
+            break;
+        case CODEC_TYPE_VIDEO:
+            /* check if same codec with same parameters. If so, no
+               reencoding is needed */
+            if (codec->codec_id == icodec->codec_id &&
+                codec->bit_rate == icodec->bit_rate &&
+                codec->frame_rate == icodec->frame_rate &&
+                codec->width == icodec->width &&
+                codec->height == icodec->height) {
+                /* no reencoding */
+            } else {
+                if (codec->width == icodec->width &&
+                    codec->height == icodec->height) {
+                    ost->video_resample = 0;
+                } else {
+                    UINT8 *buf;
+                    ost->video_resample = 1;
+                    buf = malloc((codec->width * codec->height * 3) / 2);
+                    if (!buf)
+                        goto fail;
+                    ost->pict_tmp.data[0] = buf;
+                    ost->pict_tmp.data[1] = ost->pict_tmp.data[0] + (codec->width * codec->height);
+                    ost->pict_tmp.data[2] = ost->pict_tmp.data[1] + (codec->width * codec->height) / 4;
+                    ost->pict_tmp.linesize[0] = codec->width;
+                    ost->pict_tmp.linesize[1] = codec->width / 2;
+                    ost->pict_tmp.linesize[2] = codec->width / 2;
+
+                    ost->img_resample_ctx = img_resample_init( 
+                                      ost->st->codec.width, ost->st->codec.height,
+                                      ist->st->codec.width, ist->st->codec.height);
+                }
+                ost->encoding_needed = 1;
+                ist->decoding_needed = 1;
+            }
+            break;
+        }
+    }
+
+    /* open each encoder */
+    for(i=0;i<nb_ostreams;i++) {
+        ost = ost_table[i];
+        if (ost->encoding_needed) {
+            AVCodec *codec;
+            codec = avcodec_find_encoder(ost->st->codec.codec_id);
+            if (!codec) {
+                fprintf(stderr, "Unsupported codec for output stream #%d.%d\n", 
+                        ost->file_index, ost->index);
+                exit(1);
+            }
+            if (avcodec_open(&ost->st->codec, codec) < 0) {
+                fprintf(stderr, "Error while opening codec for stream #%d.%d - maybe incorrect parameters such as bit_rate, rate, width or height\n", 
+                        ost->file_index, ost->index);
+                exit(1);
+            }
+        }
+    }
+
+    /* open each decoder */
+    for(i=0;i<nb_istreams;i++) {
+        ist = ist_table[i];
+        if (ist->decoding_needed) {
+            AVCodec *codec;
+            codec = avcodec_find_decoder(ist->st->codec.codec_id);
+            if (!codec) {
+                fprintf(stderr, "Unsupported codec for input stream #%d.%d\n", 
+                        ist->file_index, ist->index);
+                exit(1);
+            }
+            if (avcodec_open(&ist->st->codec, codec) < 0) {
+                fprintf(stderr, "Error while opening codec for input stream #%d.%d\n", 
+                        ist->file_index, ist->index);
+                exit(1);
+            }
+        }
+    }
+
+    /* init pts */
+    for(i=0;i<nb_istreams;i++) {
+        ist = ist_table[i];
+        ist->pts = 0;
+        ist->frame_number = 0;
+    }
+    
+    /* compute buffer size max (should use a complete heuristic) */
+    for(i=0;i<nb_input_files;i++) {
+        file_table[i].buffer_size_max = 2048;
+    }
+
+    /* open files and write file headers */
+    for(i=0;i<nb_output_files;i++) {
+        os = output_files[i];
+        os->format->write_header(os);
+    }
+
+    start_time = gettime();
+    min_pts = 0;
+    for(;;) {
+        int file_index, ist_index;
+        AVPacket pkt;
+        UINT8 *ptr;
+        int len;
+        UINT8 *data_buf;
+        int data_size, got_picture;
+        AVPicture picture;
+        short samples[AVCODEC_MAX_AUDIO_FRAME_SIZE / 2];
+
+        /* select the input file with the smallest pts */
+    redo:
+        file_index = -1;
+        min_pts = (1ULL << 63) - 1;
+        for(i=0;i<nb_istreams;i++) {
+            ist = ist_table[i];
+            if (!ist->discard && !file_table[ist->file_index].eof_reached && ist->pts < min_pts) {
+                min_pts = ist->pts;
+                file_index = ist->file_index;
+            }
+        }
+        /* if none, if is finished */
+        if (file_index < 0)
+            break;
+        /* finish if recording time exhausted */
+        if (recording_time > 0 && min_pts >= recording_time)
+            break;
+        /* read a packet from it and output it in the fifo */
+        
+        is = input_files[file_index];
+        if (av_read_packet(is, &pkt) < 0) {
+            file_table[file_index].eof_reached = 1;
+            continue;
+        }
+        ist_index = file_table[file_index].ist_index + pkt.stream_index;
+        ist = ist_table[ist_index];
+        if (ist->discard) {
+            continue;
+        }
+
+#ifdef HEX_DUMP
+        printf("stream #%d, size=%d:\n", pkt.stream_index, pkt.size);
+        hex_dump(pkt.data, pkt.size);
+#endif
+
+        //        printf("read #%d.%d size=%d\n", ist->file_index, ist->index, pkt.size);
+
+        len = pkt.size;
+        ptr = pkt.data;
+        while (len > 0) {
+
+            /* decode the packet if needed */
+            data_buf = NULL; /* fail safe */
+            data_size = 0;
+            if (ist->decoding_needed) {
+                switch(ist->st->codec.codec_type) {
+                case CODEC_TYPE_AUDIO:
+                    if (ist->st->codec.codec_id == CODEC_ID_PCM) {
+                        /* no need to call a codec */
+                        data_buf = ptr;
+                        data_size = len;
+                        ret = len;
+                    } else {
+                        ret = avcodec_decode_audio(&ist->st->codec, samples, &data_size,
+                                                   ptr, len);
+                        if (ret < 0)
+                            goto fail_decode;
+                        if (data_size == 0) {
+                            /* no audio frame */
+                            ptr += ret;
+                            len -= ret;
+                            continue;
+                        }
+                        data_buf = (UINT8 *)samples;
+                    }
+                    break;
+                case CODEC_TYPE_VIDEO:
+                    if (ist->st->codec.codec_id == CODEC_ID_RAWVIDEO) {
+                        int size;
+                        size = (ist->st->codec.width * ist->st->codec.height);
+                        
+                        picture.data[0] = ptr;
+                        picture.data[1] = picture.data[0] + size;
+                        picture.data[2] = picture.data[1] + size / 4;
+                        picture.linesize[0] = ist->st->codec.width;
+                        picture.linesize[1] = ist->st->codec.width / 2;
+                        picture.linesize[2] = ist->st->codec.width / 2;
+                        ret = len;
+                    } else {
+                        data_size = (ist->st->codec.width * ist->st->codec.height * 3) / 2;
+                        ret = avcodec_decode_video(&ist->st->codec, 
+                                                   &picture, &got_picture, ptr, len);
+                        if (ret < 0) {
+                        fail_decode:
+                            fprintf(stderr, "Error while decoding stream #%d.%d\n",
+                                    ist->file_index, ist->index);
+                            av_free_packet(&pkt);
+                            goto redo;
+                        }
+                        if (!got_picture) {
+                            /* no picture yet */
+                            ptr += ret;
+                            len -= ret;
+                            continue;
+                        }
+                    }
+                    break;
+                default:
+                    goto fail_decode;
+                }
+            } else {
+                data_buf = ptr;
+                data_size = len;
+                ret = len;
+            }
+            /* update pts */
+            switch(ist->st->codec.codec_type) {
+            case CODEC_TYPE_AUDIO:
+                ist->pts = (INT64)1000000 * ist->sample_index / ist->st->codec.sample_rate;
+                ist->sample_index += data_size / (2 * ist->st->codec.channels);
+                break;
+            case CODEC_TYPE_VIDEO:
+                ist->frame_number++;
+                ist->pts = ((INT64)ist->frame_number * 1000000 * FRAME_RATE_BASE) / 
+                    ist->st->codec.frame_rate;
+                break;
+            }
+            ptr += ret;
+            len -= ret;
+
+            /* transcode raw format, encode packets and output them */
+            
+            for(i=0;i<nb_ostreams;i++) {
+                ost = ost_table[i];
+                if (ost->source_index == ist_index) {
+                    os = output_files[ost->file_index];
+
+                    if (ost->encoding_needed) {
+                        switch(ost->st->codec.codec_type) {
+                        case CODEC_TYPE_AUDIO:
+                            do_audio_out(os, ost, ist, data_buf, data_size);
+                            break;
+                        case CODEC_TYPE_VIDEO:
+                            do_video_out(os, ost, ist, &picture);
+                            break;
+                        }
+                    } else {
+                        /* no reencoding needed : output the packet directly */
+                        os->format->write_packet(os, ost->index, data_buf, data_size);
+                    }
+                }
+            }
+        }
+        av_free_packet(&pkt);
+        
+        /* dump report by using the first video and audio streams */
+        {
+            char buf[1024];
+            AVFormatContext *oc;
+            INT64 total_size, ti;
+            AVCodecContext *enc;
+            int frame_number, vid;
+            double bitrate, ti1;
+            static INT64 last_time;
+
+            if ((min_pts - last_time) >= 500000) {
+                last_time = min_pts;
+                
+                oc = output_files[0];
+                
+                total_size = url_ftell(&oc->pb);
+                
+                buf[0] = '\0';
+                ti = (1ULL << 63) - 1;
+                vid = 0;
+                for(i=0;i<nb_ostreams;i++) {
+                    ost = ost_table[i];
+                    enc = &ost->st->codec;
+                    ist = ist_table[ost->source_index];
+                    if (!vid && enc->codec_type == CODEC_TYPE_VIDEO) {
+                        frame_number = ist->frame_number;
+                        sprintf(buf + strlen(buf), "frame=%5d q=%2d ",
+                                frame_number, enc->quality);
+                        vid = 1;
+                    }
+                    /* compute min pts value */
+                    if (!ist->discard && ist->pts < ti) {
+                        ti = ist->pts;
+                    }
+                }
+
+                ti1 = ti / 1000000.0;
+                if (ti1 < 0.1)
+                    ti1 = 0.1;
+                bitrate = (double)(total_size * 8) / ti1 / 1000.0;
+
+                sprintf(buf + strlen(buf), "size=%8LdkB time=%0.1f bitrate=%6.1fkbits/s", 
+                        total_size / 1024, ti1, bitrate);
+                
+                fprintf(stderr, "%s    \r", buf);
+                fflush(stderr);
+            }
+        }
+    }
+
+    /* dump report by using the first video and audio streams */
+    {
+        char buf[1024];
+        AVFormatContext *oc;
+        INT64 total_size, ti;
+        AVCodecContext *enc;
+        int frame_number, vid;
+        double bitrate, ti1;
+
+        oc = output_files[0];
+        
+        total_size = url_ftell(&oc->pb);
+        
+        buf[0] = '\0';
+        ti = (1ULL << 63) - 1;
+        vid = 0;
+        for(i=0;i<nb_ostreams;i++) {
+            ost = ost_table[i];
+            enc = &ost->st->codec;
+            ist = ist_table[ost->source_index];
+            if (!vid && enc->codec_type == CODEC_TYPE_VIDEO) {
+                frame_number = ist->frame_number;
+                sprintf(buf + strlen(buf), "frame=%5d q=%2d ",
+                        frame_number, enc->quality);
+                vid = 1;
+            }
+            /* compute min pts value */
+            if (!ist->discard && ist->pts < ti) {
+                ti = ist->pts;
+            }
+        }
+        
+        ti1 = ti / 1000000.0;
+        if (ti1 < 0.1)
+            ti1 = 0.1;
+        bitrate = (double)(total_size * 8) / ti1 / 1000.0;
+        
+        sprintf(buf + strlen(buf), "size=%8LdkB time=%0.1f bitrate=%6.1fkbits/s", 
+                total_size / 1024, ti1, bitrate);
+        
+        fprintf(stderr, "%s    \n", buf);
+    }
+    /* close each encoder */
+    for(i=0;i<nb_ostreams;i++) {
+        ost = ost_table[i];
+        if (ost->encoding_needed) {
+            avcodec_close(&ost->st->codec);
+        }
+    }
+    
+    /* close each decoder */
+    for(i=0;i<nb_istreams;i++) {
+        ist = ist_table[i];
+        if (ist->decoding_needed) {
+            avcodec_close(&ist->st->codec);
+        }
+    }
+    
+
+    /* write the trailer if needed and close file */
+    for(i=0;i<nb_output_files;i++) {
+        os = output_files[i];
+        os->format->write_trailer(os);
+    }
+    /* finished ! */
+    
+    ret = 0;
+ fail1:
+    if (ist_table) {
+        for(i=0;i<nb_istreams;i++) {
+            ist = ist_table[i];
+            if (ist) {
+                free(ist);
+            }
+        }
+        free(ist_table);
+    }
+    if (ost_table) {
+        for(i=0;i<nb_ostreams;i++) {
+            ost = ost_table[i];
+            if (ost) {
+                if (ost->pict_tmp.data[0])
+                    free(ost->pict_tmp.data[0]);
+                if (ost->video_resample)
+                    img_resample_close(ost->img_resample_ctx);
+                if (ost->audio_resample)
+                    audio_resample_close(ost->resample);
+                free(ost);
+            }
+        }
+        free(ost_table);
+    }
+    return ret;
+ fail:
+    ret = -ENOMEM;
+    goto fail1;
+}
+
+#if 0
+int file_read(const char *filename)
+{
+    URLContext *h;
+    unsigned char buffer[1024];
+    int len, i;
+
+    if (url_open(&h, filename, O_RDONLY) < 0) {
+        printf("could not open '%s'\n", filename);
+        return -1;
+    }
+    for(;;) {
+        len = url_read(h, buffer, sizeof(buffer));
+        if (len <= 0)
+            break;
+        for(i=0;i<len;i++) putchar(buffer[i]);
+    }
+    url_close(h);
+    return 0;
+}
+#endif
+
+void show_licence(void)
+{
+    printf(
+    "ffmpeg version " FFMPEG_VERSION "\n"
+    "Copyright (c) 2000,2001 Gerard Lantau\n"
+    "This program is free software; you can redistribute it and/or modify\n"
+    "it under the terms of the GNU General Public License as published by\n"
+    "the Free Software Foundation; either version 2 of the License, or\n"
+    "(at your option) any later version.\n"
+    "\n"
+    "This program is distributed in the hope that it will be useful,\n"
+    "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
+    "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
+    "GNU General Public License for more details.\n"
+    "\n"
+    "You should have received a copy of the GNU General Public License\n"
+    "along with this program; if not, write to the Free Software\n"
+    "Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.\n"
+    );
+    exit(1);
+}
+
+void opt_format(const char *arg)
+{
+    AVFormat *f;
+    f = first_format;
+    while (f != NULL && strcmp(f->name, arg) != 0) f = f->next;
+    if (f == NULL) {
+        fprintf(stderr, "Invalid format: %s\n", arg);
+        exit(1);
+    }
+    file_format = f;
+}
+
+void opt_video_bitrate(const char *arg)
+{
+    video_bit_rate = atoi(arg) * 1000;
+}
+
+void opt_frame_rate(const char *arg)
+{
+    frame_rate = (int)(strtod(arg, 0) * FRAME_RATE_BASE);
+}
+
+void opt_frame_size(const char *arg)
+{
+    parse_image_size(&frame_width, &frame_height, arg);
+    if (frame_width <= 0 || frame_height <= 0) {
+        fprintf(stderr, "Incorrect frame size\n");
+        exit(1);
+    }
+    if ((frame_width % 2) != 0 || (frame_height % 2) != 0) {
+        fprintf(stderr, "Frame size must be a multiple of 2\n");
+        exit(1);
+    }
+}
+
+void opt_gop_size(const char *arg)
+{
+    gop_size = atoi(arg);
+}
+
+void opt_qscale(const char *arg)
+{
+    video_qscale = atoi(arg);
+    if (video_qscale < 0 ||
+        video_qscale > 31) {
+        fprintf(stderr, "qscale must be >= 1 and <= 31\n");
+        exit(1);
+    }
+}
+
+
+void opt_audio_bitrate(const char *arg)
+{
+    audio_bit_rate = atoi(arg) * 1000;
+}
+
+void opt_audio_rate(const char *arg)
+{
+    audio_sample_rate = atoi(arg);
+}
+
+void opt_audio_channels(const char *arg)
+{
+    audio_channels = atoi(arg);
+}
+
+void opt_video_device(const char *arg)
+{
+    v4l_device = strdup(arg);
+}
+
+void opt_audio_device(const char *arg)
+{
+    audio_device = strdup(arg);
+}
+
+void opt_audio_codec(const char *arg)
+{
+    AVCodec *p;
+
+    p = first_avcodec;
+    while (p) {
+        if (!strcmp(p->name, arg) && p->type == CODEC_TYPE_AUDIO)
+            break;
+        p = p->next;
+    }
+    if (p == NULL) {
+        fprintf(stderr, "Unknown audio codec '%s'\n", arg);
+        exit(1);
+    } else {
+        audio_codec_id = p->id;
+    }
+}
+
+const char *motion_str[] = {
+    "zero",
+    "full",
+    "log",
+    "phods",
+    NULL,
+};
+
+void opt_motion_estimation(const char *arg)
+{
+    const char **p;
+    p = motion_str;
+    for(;;) {
+        if (!*p) {
+            fprintf(stderr, "Unknown motion estimation method '%s'\n", arg);
+            exit(1);
+        }
+        if (!strcmp(*p, arg))
+            break;
+        p++;
+    }
+    motion_estimation_method = p - motion_str;
+}
+
+void opt_video_codec(const char *arg)
+{
+    AVCodec *p;
+
+    p = first_avcodec;
+    while (p) {
+        if (!strcmp(p->name, arg) && p->type == CODEC_TYPE_VIDEO)
+            break;
+        p = p->next;
+    }
+    if (p == NULL) {
+        fprintf(stderr, "Unknown video codec '%s'\n", arg);
+        exit(1);
+    } else {
+        video_codec_id = p->id;
+    }
+}
+
+void opt_map(const char *arg)
+{
+    AVStreamMap *m;
+    const char *p;
+
+    p = arg;
+    m = &stream_maps[nb_stream_maps++];
+
+    m->file_index = strtol(arg, (char **)&p, 0);
+    if (*p)
+        p++;
+    m->stream_index = strtol(arg, (char **)&p, 0);
+}
+
+void opt_recording_time(const char *arg)
+{
+    recording_time = parse_date(arg, 1);
+}
+
+/* return the number of packet read to find the codec parameters */
+int find_codec_parameters(AVFormatContext *ic)
+{
+    int val, i, count, ret, got_picture, size;
+    AVCodec *codec;
+    AVCodecContext *enc;
+    AVStream *st;
+    AVPacket *pkt;
+    AVPicture picture;
+    AVPacketList *pktl, **ppktl;
+    short samples[AVCODEC_MAX_AUDIO_FRAME_SIZE / 2];
+    UINT8 *ptr;
+
+    count = 0;
+    ppktl = &ic->packet_buffer;
+    for(;;) {
+        for(i=0;i<ic->nb_streams;i++) {
+            enc = &ic->streams[i]->codec;
+            
+            switch(enc->codec_type) {
+            case CODEC_TYPE_AUDIO:
+                val = enc->sample_rate;
+                break;
+            case CODEC_TYPE_VIDEO:
+                val = enc->width;
+                break;
+            default:
+                val = 1;
+                break;
+            }
+            /* if no parameters supplied, then we should read it from
+               the stream */
+            if (val == 0)
+                break;
+        }
+        if (i == ic->nb_streams) {
+            ret = count;
+            break;
+        }
+
+        if (count == 0) {
+            /* open each codec */
+            for(i=0;i<ic->nb_streams;i++) {
+                st = ic->streams[i];
+                codec = avcodec_find_decoder(st->codec.codec_id);
+                if (codec == NULL) {
+                    ret = -1;
+                    goto the_end;
+                }
+                avcodec_open(&st->codec, codec);
+            }
+        }
+        pktl = av_mallocz(sizeof(AVPacketList));
+        if (!pktl) {
+            ret = -1;
+            break;
+        }
+
+        /* add the packet in the buffered packet list */
+        *ppktl = pktl;
+        ppktl = &pktl->next;
+
+        pkt = &pktl->pkt;
+        if (ic->format->read_packet(ic, pkt) < 0) {
+            ret = -1;
+            break;
+        }
+        st = ic->streams[pkt->stream_index];
+
+        /* decode the data and update codec parameters */
+        ptr = pkt->data;
+        size = pkt->size;
+        while (size > 0) {
+            switch(st->codec.codec_type) {
+            case CODEC_TYPE_VIDEO:
+                ret = avcodec_decode_video(&st->codec, &picture, &got_picture, ptr, size);
+                break;
+            case CODEC_TYPE_AUDIO:
+                ret = avcodec_decode_audio(&st->codec, samples, &got_picture, ptr, size);
+                break;
+            default:
+                ret = -1;
+                break;
+            }
+            if (ret < 0) {
+                ret = -1;
+                goto the_end;
+            }
+            if (got_picture)
+                break;
+            ptr += ret;
+            size -= ret;
+        }
+
+        count++;
+    }
+ the_end:
+    if (count > 0) {
+        /* close each codec */
+        for(i=0;i<ic->nb_streams;i++) {
+            st = ic->streams[i];
+            avcodec_close(&st->codec);
+        }
+    }
+    return ret;
+}
+
+
+void opt_input_file(const char *filename)
+{
+    AVFormatContext *ic;
+    AVFormatParameters params, *ap = &params;
+    URLFormat url_format;
+    AVFormat *fmt;
+    int err, i, ret;
+
+    ic = av_mallocz(sizeof(AVFormatContext));
+    strcpy(ic->filename, filename);
+    /* first format guess to know if we must open file */
+    fmt = file_format;
+    if (!fmt) 
+        fmt = guess_format(NULL, filename, NULL);
+    
+    if (fmt == NULL || !(fmt->flags & AVFMT_NOFILE)) {
+        /* open file */
+        if (url_fopen(&ic->pb, filename, URL_RDONLY) < 0) {
+            fprintf(stderr, "Could not open '%s'\n", filename);
+            exit(1);
+        }
+    
+        /* find format and set default parameters */
+        fmt = file_format;
+        err = url_getformat(url_fileno(&ic->pb), &url_format);
+        if (err >= 0) {
+            if (!fmt)
+                fmt = guess_format(url_format.format_name, NULL, NULL);
+            ap->sample_rate = url_format.sample_rate;
+            ap->frame_rate = url_format.frame_rate;
+            ap->channels = url_format.channels;
+            ap->width = url_format.width;
+            ap->height = url_format.height;
+            ap->pix_fmt = url_format.pix_fmt;
+        } else {
+            if (!fmt)
+                fmt = guess_format(NULL, filename, NULL);
+            memset(ap, 0, sizeof(*ap));
+        }
+    } else {
+        memset(ap, 0, sizeof(*ap));
+    }
+
+    if (!fmt || !fmt->read_header) {
+        fprintf(stderr, "%s: Unknown file format\n", filename);
+        exit(1);
+    }
+    ic->format = fmt;
+
+    /* get default parameters from command line */
+    if (!ap->sample_rate)
+        ap->sample_rate = audio_sample_rate;
+    if (!ap->channels)
+        ap->channels = audio_channels;
+
+    if (!ap->frame_rate)
+        ap->frame_rate = frame_rate;
+    if (!ap->width)
+        ap->width = frame_width;
+    if (!ap->height)
+        ap->height = frame_height;
+    
+    err = ic->format->read_header(ic, ap);
+    if (err < 0) {
+        fprintf(stderr, "%s: Error while parsing header\n", filename);
+        exit(1);
+    }
+    
+    /* If not enough info for the codecs, we decode the first frames
+       to get it. (used in mpeg case for example) */
+    ret = find_codec_parameters(ic);
+    if (ret < 0) {
+        fprintf(stderr, "%s: could not find codec parameters\n", filename);
+        exit(1);
+    }
+
+    /* update the current parameters so that they match the one of the input stream */
+    for(i=0;i<ic->nb_streams;i++) {
+        AVCodecContext *enc = &ic->streams[i]->codec;
+        switch(enc->codec_type) {
+        case CODEC_TYPE_AUDIO:
+            audio_channels = enc->channels;
+            audio_sample_rate = enc->sample_rate;
+            break;
+        case CODEC_TYPE_VIDEO:
+            frame_height = enc->height;
+            frame_width = enc->width;
+            frame_rate = enc->frame_rate;
+            break;
+        }
+    }
+    
+    input_files[nb_input_files] = ic;
+    /* dump the file content */
+    dump_format(ic, nb_input_files, filename, 0);
+    nb_input_files++;
+    file_format = NULL;
+}
+
+void opt_output_file(const char *filename)
+{
+    AVStream *st;
+    AVFormatContext *oc;
+    int use_video, use_audio, nb_streams;
+    int codec_id;
+
+    if (!strcmp(filename, "-"))
+        filename = "pipe:";
+
+    oc = av_mallocz(sizeof(AVFormatContext));
+
+    if (!file_format) {
+        file_format = guess_format(NULL, filename, NULL);
+        if (!file_format)
+            file_format = &mpeg_mux_format;
+    }
+    
+    oc->format = file_format;
+
+    if (!strcmp(file_format->name, "ffm") && 
+        strstart(filename, "http:", NULL)) {
+        /* special case for files sent to ffserver: we get the stream
+           parameters from ffserver */
+        if (read_ffserver_streams(oc, filename) < 0) {
+            fprintf(stderr, "Could not read stream parameters from '%s'\n", filename);
+            exit(1);
+        }
+    } else {
+        use_video = file_format->video_codec != CODEC_ID_NONE;
+        use_audio = file_format->audio_codec != CODEC_ID_NONE;
+        
+        if (audio_disable) {
+            use_audio = 0;
+        }
+        if (video_disable) {
+            use_video = 0;
+        }
+        
+        nb_streams = 0;
+        if (use_video) {
+            AVCodecContext *video_enc;
+            
+            st = av_mallocz(sizeof(AVStream));
+            if (!st) {
+                fprintf(stderr, "Could not alloc stream\n");
+                exit(1);
+            }
+            video_enc = &st->codec;
+
+            codec_id = file_format->video_codec;
+            if (video_codec_id != CODEC_ID_NONE)
+                codec_id = video_codec_id;
+
+            video_enc->codec_id = codec_id;
+            video_enc->codec_type = CODEC_TYPE_VIDEO;
+            
+            video_enc->bit_rate = video_bit_rate;
+            video_enc->frame_rate = frame_rate; 
+            
+            video_enc->width = frame_width;
+            video_enc->height = frame_height;
+            if (!intra_only)
+                video_enc->gop_size = gop_size;
+            else
+                video_enc->gop_size = 0;
+            if (video_qscale || same_quality) {
+                video_enc->flags |= CODEC_FLAG_QSCALE;
+                video_enc->quality = video_qscale;
+            }
+
+            oc->streams[nb_streams] = st;
+            nb_streams++;
+        }
+    
+        if (use_audio) {
+            AVCodecContext *audio_enc;
+
+            st = av_mallocz(sizeof(AVStream));
+            if (!st) {
+                fprintf(stderr, "Could not alloc stream\n");
+                exit(1);
+            }
+            audio_enc = &st->codec;
+            codec_id = file_format->audio_codec;
+            if (audio_codec_id != CODEC_ID_NONE)
+                codec_id = audio_codec_id;
+            audio_enc->codec_id = codec_id;
+            audio_enc->codec_type = CODEC_TYPE_AUDIO;
+            
+            audio_enc->bit_rate = audio_bit_rate;
+            audio_enc->sample_rate = audio_sample_rate;
+            audio_enc->channels = audio_channels;
+            oc->streams[nb_streams] = st;
+            nb_streams++;
+        }
+
+        oc->nb_streams = nb_streams;
+
+        if (!nb_streams) {
+            fprintf(stderr, "No audio or video selected\n");
+            exit(1);
+        }
+
+        if (str_title)
+            nstrcpy(oc->title, sizeof(oc->title), str_title);
+        if (str_author)
+            nstrcpy(oc->author, sizeof(oc->author), str_author);
+        if (str_copyright)
+            nstrcpy(oc->copyright, sizeof(oc->copyright), str_copyright);
+        if (str_comment)
+            nstrcpy(oc->comment, sizeof(oc->comment), str_comment);
+    }
+
+    output_files[nb_output_files] = oc;
+    /* dump the file content */
+    dump_format(oc, nb_output_files, filename, 1);
+    nb_output_files++;
+
+    strcpy(oc->filename, filename);
+    if (!(oc->format->flags & AVFMT_NOFILE)) {
+        /* test if it already exists to avoid loosing precious files */
+        if (!file_overwrite && 
+            (strchr(filename, ':') == NULL ||
+             strstart(filename, "file:", NULL))) {
+            if (url_exist(filename)) {
+                int c;
+                
+                printf("File '%s' already exists. Overwrite ? [y/N] ", filename);
+                fflush(stdout);
+                c = getchar();
+                if (toupper(c) != 'Y') {
+                    fprintf(stderr, "Not overwriting - exiting\n");
+                    exit(1);
+                }
+            }
+        }
+        
+        /* open the file */
+        if (url_fopen(&oc->pb, filename, URL_WRONLY) < 0) {
+            fprintf(stderr, "Could not open '%s'\n", filename);
+            exit(1);
+        }
+    }
+
+    /* reset some options */
+    file_format = NULL;
+    audio_disable = 0;
+    video_disable = 0;
+    audio_codec_id = CODEC_ID_NONE;
+    video_codec_id = CODEC_ID_NONE;
+}
+
+void show_formats(void)
+{
+    AVFormat *f;
+    URLProtocol *up;
+    AVCodec *p;
+    const char **pp;
+
+    printf("File formats:\n");
+    printf("  Encoding:");
+    for(f = first_format; f != NULL; f = f->next) {
+        if (f->write_header)
+            printf(" %s", f->name);
+    }
+    printf("\n");
+    printf("  Decoding:");
+    for(f = first_format; f != NULL; f = f->next) {
+        if (f->read_header)
+            printf(" %s", f->name);
+    }
+    printf("\n");
+
+    printf("Codecs:\n");
+    printf("  Encoders:");
+    for(p = first_avcodec; p != NULL; p = p->next) {
+        if (p->encode)
+            printf(" %s", p->name);
+    }
+    printf("\n");
+
+    printf("  Decoders:");
+    for(p = first_avcodec; p != NULL; p = p->next) {
+        if (p->decode)
+            printf(" %s", p->name);
+    }
+    printf("\n");
+
+    printf("Supported file protocols:");
+    for(up = first_protocol; up != NULL; up = up->next)
+        printf(" %s:", up->name);
+    printf("\n");
+    
+    printf("Frame size abbreviations: sqcif qcif cif 4cif\n");
+    printf("Motion estimation methods:");
+    pp = motion_str;
+    while (*pp) {
+        printf(" %s", *pp);
+        if ((pp - motion_str) == ME_ZERO) 
+            printf("(fastest)");
+        else if ((pp - motion_str) == ME_FULL) 
+            printf("(slowest)");
+        else if ((pp - motion_str) == ME_LOG) 
+            printf("(default)");
+        pp++;
+    }
+    printf("\n");
+    exit(1);
+}
+
+void show_help(void)
+{
+    const OptionDef *po;
+    int i, expert;
+
+    printf("ffmpeg version " FFMPEG_VERSION ", Copyright (c) 2000,2001 Gerard Lantau\n"
+           "usage: ffmpeg [[options] -i input_file]... {[options] outfile}...\n"
+           "Hyper fast MPEG1/MPEG4/H263/RV and AC3/MPEG audio encoder\n"
+           "\n"
+           "Main options are:\n");
+    for(i=0;i<2;i++) {
+        if (i == 1)
+            printf("\nAdvanced options are:\n");
+        for(po = options; po->name != NULL; po++) {
+            char buf[64];
+            expert = (po->flags & OPT_EXPERT) != 0;
+            if (expert == i) {
+                strcpy(buf, po->name);
+                if (po->flags & HAS_ARG) {
+                    strcat(buf, " ");
+                    strcat(buf, po->argname);
+                }
+                printf("-%-17s  %s\n", buf, po->help);
+            }
+        }
+    }
+
+    exit(1);
+}
+
+const OptionDef options[] = {
+    { "L", 0, {show_licence}, "show license" },
+    { "h", 0, {show_help}, "show help" },
+    { "formats", 0, {show_formats}, "show available formats, codecs, protocols, ..." },
+    { "f", HAS_ARG, {opt_format}, "force format", "fmt" },
+    { "i", HAS_ARG, {opt_input_file}, "input file name", "filename" },
+    { "y", OPT_BOOL, {int_arg:&file_overwrite}, "overwrite output files" },
+    { "map", HAS_ARG | OPT_EXPERT, {opt_map}, "set input stream mapping", "file:stream" },
+    { "t", HAS_ARG, {opt_recording_time}, "set the recording time", "duration" },
+    { "title", HAS_ARG | OPT_STRING, {str_arg: &str_title}, "set the title", "string" },
+    { "author", HAS_ARG | OPT_STRING, {str_arg: &str_author}, "set the author", "string" },
+    { "copyright", HAS_ARG | OPT_STRING, {str_arg: &str_copyright}, "set the copyright", "string" },
+    { "comment", HAS_ARG | OPT_STRING, {str_arg: &str_comment}, "set the comment", "string" },
+    /* video options */
+    { "b", HAS_ARG, {opt_video_bitrate}, "set video bitrate (in kbit/s)", "bitrate" },
+    { "r", HAS_ARG, {opt_frame_rate}, "set frame rate (in Hz)", "rate" },
+    { "s", HAS_ARG, {opt_frame_size}, "set frame size (WxH or abbreviation)", "size" },
+    { "g", HAS_ARG | OPT_EXPERT, {opt_gop_size}, "set the group of picture size", "gop_size" },
+    { "intra", OPT_BOOL | OPT_EXPERT, {int_arg: &intra_only}, "use only intra frames"},
+    { "vn", OPT_BOOL, {int_arg: &video_disable}, "disable video" },
+    { "qscale", HAS_ARG | OPT_EXPERT, {opt_qscale}, "use fixed video quantiser scale (VBR)", "q" },
+    { "vd", HAS_ARG | OPT_EXPERT, {opt_video_device}, "set video device", "device" },
+    { "vcodec", HAS_ARG | OPT_EXPERT, {opt_video_codec}, "force video codec", "codec" },
+    { "me", HAS_ARG | OPT_EXPERT, {opt_motion_estimation}, "set motion estimation method", 
+      "method" },
+    { "sameq", OPT_BOOL, {int_arg: &same_quality}, 
+      "use same video quality as source (implies VBR)" },
+    /* audio options */
+    { "ab", HAS_ARG, {opt_audio_bitrate}, "set audio bitrate (in kbit/s)", "bitrate", },
+    { "ar", HAS_ARG, {opt_audio_rate}, "set audio sampling rate (in Hz)", "rate" },
+    { "ac", HAS_ARG, {opt_audio_channels}, "set number of audio channels", "channels" },
+    { "an", OPT_BOOL, {int_arg: &audio_disable}, "disable audio" },
+    { "ad", HAS_ARG | OPT_EXPERT, {opt_audio_device}, "set audio device", "device" },
+    { "acodec", HAS_ARG | OPT_EXPERT, {opt_audio_codec}, "force audio codec", "codec" },
+
+    { NULL, },
+};
+
+int main(int argc, char **argv)
+{
+    int optindex, i;
+    const char *opt, *arg;
+    const OptionDef *po;
+    
+    register_all();
+
+    if (argc <= 1)
+        show_help();
+
+    optindex = 1;
+    while (optindex < argc) {
+        opt = argv[optindex++];
+        
+        if (opt[0] == '-' && opt[1] != '\0') {
+            po = options;
+            while (po->name != NULL) {
+                if (!strcmp(opt + 1, po->name))
+                    break;
+                po++;
+            }
+            if (!po->name) {
+                fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
+                exit(1);
+            }
+            arg = NULL;
+            if (po->flags & HAS_ARG)
+                arg = argv[optindex++];
+            if (po->flags & OPT_STRING) {
+                char *str;
+                str = strdup(arg);
+                *po->u.str_arg = str;
+            } else if (po->flags & OPT_BOOL) {
+                *po->u.int_arg = 1;
+            } else {
+                po->u.func_arg(arg);
+            }
+        } else {
+            opt_output_file(opt);
+        }
+    }
+
+
+    if (nb_input_files == 0) {
+        if (nb_output_files != 1) {
+            fprintf(stderr, "Only one output file supported when grabbing\n");
+            exit(1);
+        }
+        av_grab(output_files[0]);
+    } else {
+        if (nb_output_files <= 0) {
+            fprintf(stderr, "Must supply at least one output file\n");
+            exit(1);
+        }
+        av_encode(output_files, nb_output_files, input_files, nb_input_files, 
+                  stream_maps, nb_stream_maps);
+    }
+
+    /* close files */
+    for(i=0;i<nb_output_files;i++) {
+        if (!(output_files[i]->format->flags & AVFMT_NOFILE)) 
+            url_fclose(&output_files[i]->pb);
+    }
+    for(i=0;i<nb_input_files;i++) {
+        if (!(input_files[i]->format->flags & AVFMT_NOFILE)) 
+            url_fclose(&input_files[i]->pb);
+    }
+
+    return 0;
+}