Initial work on transcoder

3 files changed, 884 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f0e3bca
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/target
+**/*.rs.bk
\ No newline at end of file
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..f73d291
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "nihav-encoder"
+version = "0.1.0"
+authors = ["Kostya Shishkov <kostya.shishkov@gmail.com>"]
+edition = "2018"
+
+[dependencies]
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..fb4d80f
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,875 @@
+extern crate nihav_core;
+extern crate nihav_codec_support;
+extern crate nihav_registry;
+extern crate nihav_allstuff;
+
+use std::fs::File;
+use nihav_core::io::byteio::{FileReader, ByteReader};
+use nihav_core::frame::*;
+use nihav_core::options::*;
+use nihav_core::codecs::*;
+use nihav_core::demuxers::*;
+use nihav_core::muxers::*;
+use nihav_core::scale::*;
+use nihav_core::soundcvt::*;
+use nihav_registry::detect;
+use nihav_allstuff::*;
+use std::env;
+
+fn print_options(name: &str, options: &[NAOptionDefinition]) {
+    if options.is_empty() {
+        println!("No custom options.");
+    } else {
+        println!("Options for '{}'", name);
+        for opt in options.iter() {
+            println!(" {}", opt);
+        }
+    }
+}
+
+struct OptionArgs {
+    name:   String,
+    value:  Option<String>,
+}
+
+struct InputStreamOptions {
+    id:             u32,
+    drop:           bool,
+    dec_opts:       Vec<OptionArgs>,
+}
+
+struct OutputStreamOptions {
+    id:             u32,
+    enc_params:     EncodeParameters,
+    enc_name:       String,
+    enc_opts:       Vec<OptionArgs>,
+}
+
+enum OutputConvert {
+    Video(NAScale, NABufferType),
+    Audio(NAAudioInfo, NAChannelMap),
+    None,
+}
+
+enum OutputMode {
+    Drop,
+    Copy(u32),
+    Encode(u32, Box<dyn NAEncoder>, OutputConvert),
+}
+
+#[derive(Default)]
+struct Transcoder {
+    input_name:     String,
+    input_fmt:      Option<String>,
+    output_name:    String,
+    output_fmt:     Option<String>,
+    demux_opts:     Vec<OptionArgs>,
+    mux_opts:       Vec<OptionArgs>,
+    istr_opts:      Vec<InputStreamOptions>,
+    ostr_opts:      Vec<OutputStreamOptions>,
+    decoders:       Vec<Option<(Box<NADecoderSupport>, Box<dyn NADecoder>)>>,
+    encoders:       Vec<OutputMode>,
+    no_video:       bool,
+    no_audio:       bool,
+}
+
+macro_rules! parse_and_apply_options {
+    ($obj: expr, $in_opts: expr, $name: expr) => {
+        let mut opts = Vec::with_capacity($in_opts.len());
+        let opt_def = $obj.get_supported_options();
+        for opt in $in_opts.iter() {
+            let mut found = false;
+            for opt_def in opt_def.iter() {
+                if opt.name == opt_def.name {
+                    let arg = if let Some(ref str) = opt.value { Some(str) } else { None };
+                    let ret = opt_def.parse(&opt.name, arg);
+                    if ret.is_err() {
+                        println!("invalid option {} for {}", opt.name, $name);
+                    } else {
+                        let (val, _) = ret.unwrap();
+                        opts.push(val);
+                    }
+                    found = true;
+                }
+            }
+            if !found {
+                println!("  ignoring option '{}' for {}", opt.name, $name);
+            }
+        }
+        $obj.set_options(opts.as_slice());
+    }
+}
+
+impl Transcoder {
+    fn new() -> Self { Self::default() }
+    fn parse_istream_options(&mut self, opt0: &str, opt1: &str) -> bool {
+        let (_, strno) = opt0.split_at(9);
+        let ret = strno.parse::<u32>();
+        if ret.is_err() { return false; }
+        let streamno = ret.unwrap();
+
+        let sidx = if let Some(idx) = self.istr_opts.iter().position(|str| str.id == streamno) {
+                idx
+            } else {
+                self.istr_opts.push(InputStreamOptions {id: streamno, drop: false, dec_opts: Vec::new() });
+                self.istr_opts.len() - 1
+            };
+        let istr = &mut self.istr_opts[sidx];
+        
+        for opt in opt1.split(',') {
+            let oval: Vec<_> = opt.split('=').collect();
+            if oval.len() == 1 {
+                match oval[0] {
+                    "drop" => { istr.drop = true; },
+                    _ => {
+                        istr.dec_opts.push(OptionArgs{ name: oval[0].to_string(), value: None });
+                    },
+                };
+            } else if oval.len() == 2 {
+                istr.dec_opts.push(OptionArgs{ name: oval[0].to_string(), value: Some(oval[1].to_string()) });
+            } else {
+                println!("unrecognized option '{}'", opt);
+            }
+        }
+        true
+    }
+    fn parse_ostream_options(&mut self, opt0: &str, opt1: &str, enc_reg: &RegisteredEncoders) -> bool {
+        let (_, strno) = opt0.split_at(9);
+        let ret = strno.parse::<u32>();
+        if ret.is_err() { return false; }
+        let streamno = ret.unwrap();
+
+        let sidx = if let Some(idx) = self.ostr_opts.iter().position(|str| str.id == streamno) {
+                idx
+            } else {
+                self.ostr_opts.push(OutputStreamOptions {id: streamno, enc_name: String::new(), enc_params: EncodeParameters::default(), enc_opts: Vec::new() });
+                self.ostr_opts.len() - 1
+            };
+        let ostr = &mut self.ostr_opts[sidx];
+        
+        for opt in opt1.split(',') {
+            let oval: Vec<_> = opt.split('=').collect();
+            if oval.len() == 1 {
+                match oval[0] {
+                    "flip" => {
+                        if ostr.enc_params.format == NACodecTypeInfo::None {
+                            ostr.enc_params.format = NACodecTypeInfo::Video(NAVideoInfo::new(0, 0, false, YUV420_FORMAT));
+                        }
+                        if let NACodecTypeInfo::Video(ref mut vinfo) = ostr.enc_params.format {
+                            vinfo.flipped = true;
+                        } else {
+                            println!("video option for audio stream");
+                        }
+                    },
+                    "noflip" => {
+                        if ostr.enc_params.format == NACodecTypeInfo::None {
+                            ostr.enc_params.format = NACodecTypeInfo::Video(NAVideoInfo::new(0, 0, false, YUV420_FORMAT));
+                        }
+                        if let NACodecTypeInfo::Video(ref mut vinfo) = ostr.enc_params.format {
+                            vinfo.flipped = false;
+                        } else {
+                            println!("video option for audio stream");
+                        }
+                    },
+                    _ => {
+                        ostr.enc_opts.push(OptionArgs{ name: oval[0].to_string(), value: None });
+                    },
+                };
+            } else if oval.len() == 2 {
+//todo parse encoder options, store, init later
+                match oval[0] {
+                    "encoder" => {
+                        if enc_reg.find_encoder(oval[1]).is_some() {
+                            ostr.enc_name = oval[1].to_string();
+                        } else {
+                            println!("unknown encoder '{}'", oval[1]);
+                        }
+                    },
+                    "width" => {
+                        if ostr.enc_params.format == NACodecTypeInfo::None {
+                            ostr.enc_params.format = NACodecTypeInfo::Video(NAVideoInfo::new(0, 0, false, YUV420_FORMAT));
+                        }
+                        if let NACodecTypeInfo::Video(ref mut vinfo) = ostr.enc_params.format {
+                            let ret = oval[1].parse::<usize>();
+                            if let Ok(val) = ret {
+                                vinfo.width = val;
+                            } else {
+                                println!("invalid width");
+                            }
+                        } else {
+                            println!("video option for audio stream");
+                        }
+                    },
+                    "height" => {
+                        if ostr.enc_params.format == NACodecTypeInfo::None {
+                            ostr.enc_params.format = NACodecTypeInfo::Video(NAVideoInfo::new(0, 0, false, YUV420_FORMAT));
+                        }
+                        if let NACodecTypeInfo::Video(ref mut vinfo) = ostr.enc_params.format {
+                            let ret = oval[1].parse::<usize>();
+                            if let Ok(val) = ret {
+                                vinfo.height = val;
+                            } else {
+                                println!("invalid height");
+                            }
+                        } else {
+                            println!("video option for audio stream");
+                        }
+                    },
+//todo formaton
+                    "srate" => {
+                        if ostr.enc_params.format == NACodecTypeInfo::None {
+                            ostr.enc_params.format = NACodecTypeInfo::Audio(NAAudioInfo::new(0, 0, SND_S16_FORMAT, 0));
+                        }
+                        if let NACodecTypeInfo::Audio(ref mut ainfo) = ostr.enc_params.format {
+                            let ret = oval[1].parse::<u32>();
+                            if let Ok(val) = ret {
+                                ainfo.sample_rate = val;
+                            } else {
+                                println!("invalid sampling rate");
+                            }
+                        } else {
+                            println!("audio option for video stream");
+                        }
+                    },
+                    "channels" => {
+                        if ostr.enc_params.format == NACodecTypeInfo::None {
+                            ostr.enc_params.format = NACodecTypeInfo::Audio(NAAudioInfo::new(0, 0, SND_S16_FORMAT, 0));
+                        }
+                        if let NACodecTypeInfo::Audio(ref mut ainfo) = ostr.enc_params.format {
+                            let ret = oval[1].parse::<u8>();
+                            if let Ok(val) = ret {
+                                ainfo.channels = val;
+                            } else {
+                                println!("invalid number of channels");
+                            }
+                        } else {
+                            println!("audio option for video stream");
+                        }
+                    },
+                    "block_len" => {
+                        if ostr.enc_params.format == NACodecTypeInfo::None {
+                            ostr.enc_params.format = NACodecTypeInfo::Audio(NAAudioInfo::new(0, 0, SND_S16_FORMAT, 0));
+                        }
+                        if let NACodecTypeInfo::Audio(ref mut ainfo) = ostr.enc_params.format {
+                            let ret = oval[1].parse::<usize>();
+                            if let Ok(val) = ret {
+                                ainfo.block_len = val;
+                            } else {
+                                println!("invalid block_length");
+                            }
+                        } else {
+                            println!("audio option for video stream");
+                        }
+                    },
+//todo soniton, channel map
+                    "bitrate" => {
+                        let ret = oval[1].parse::<u32>();
+                        if let Ok(val) = ret {
+                            ostr.enc_params.bitrate = val;
+                        } else {
+                            println!("invalid bitrate value");
+                        }
+                    },
+                    "quality" => {
+                        let ret = oval[1].parse::<u8>();
+                        if let Ok(val) = ret {
+                            ostr.enc_params.quality = val;
+                        } else {
+                            println!("invalid quality value");
+                        }
+                    },
+                    _ => {
+                        ostr.enc_opts.push(OptionArgs{ name: oval[0].to_string(), value: Some(oval[1].to_string()) });
+                    },
+                }
+            } else {
+                println!("unrecognized option '{}'", opt);
+            }
+        }
+        true
+    }
+    fn parse_demuxer_options(&mut self, opts: &str, dmx_reg: &RegisteredDemuxers) -> bool {
+        for opt in opts.split(',') {
+            let oval: Vec<_> = opt.split('=').collect();
+            if oval.len() == 1 {
+                self.demux_opts.push(OptionArgs{ name: oval[0].to_string(), value: None });
+            } else if oval.len() == 2 {
+                if oval[0] == "format" {
+                    if dmx_reg.find_demuxer(oval[1]).is_some() {
+                        self.input_fmt = Some(oval[1].to_string());
+                    } else {
+                        println!("unknown demuxer format '{}'", oval[1]);
+                    }
+                } else {
+                    self.demux_opts.push(OptionArgs{ name: oval[0].to_string(), value: Some(oval[1].to_string()) });
+                }
+            } else {
+                println!("unrecognized option '{}'", opt);
+            }
+        }
+        true
+    }
+    fn parse_muxer_options(&mut self, opts: &str, mux_reg: &RegisteredMuxers) -> bool {
+        for opt in opts.split(',') {
+            let oval: Vec<_> = opt.split('=').collect();
+            if oval.len() == 1 {
+                self.mux_opts.push(OptionArgs{ name: oval[0].to_string(), value: None });
+            } else if oval.len() == 2 {
+                if oval[0] == "format" {
+                    if mux_reg.find_muxer(oval[1]).is_some() {
+                        self.output_fmt = Some(oval[1].to_string());
+                    } else {
+                        println!("unknown muxer format '{}'", oval[1]);
+                    }
+                } else {
+                    self.mux_opts.push(OptionArgs{ name: oval[0].to_string(), value: Some(oval[1].to_string()) });
+                }
+            } else {
+                println!("unrecognized option '{}'", opt);
+            }
+        }
+        true
+    }
+    fn apply_decoder_options(&self, dec: &mut NADecoder, str_id: u32) {
+        if let Some(str_idx) = self.istr_opts.iter().position(|str| str.id == str_id) {
+            let dec_opts = dec.get_supported_options();
+            if dec_opts.is_empty() { return; }
+            let name = format!("input stream {}", str_id);
+            parse_and_apply_options!(dec, &self.istr_opts[str_idx].dec_opts, name);
+        }
+    }
+    fn register_output_stream(&mut self, cname: &str, istr: NAStreamRef, out_sm: &mut StreamManager, enc_reg: &RegisteredEncoders) -> bool {
+        let out_id = out_sm.get_num_streams() as u32;
+        if let Some(str_idx) = self.istr_opts.iter().position(|str| str.id == (istr.get_num() as u32)) {
+            if self.istr_opts[str_idx].drop {
+                self.encoders.push(OutputMode::Drop);
+                return true;
+            }
+        }
+
+        if let Some(str_idx) = self.ostr_opts.iter().position(|str| str.id == out_id) {
+            let oopts = &mut self.ostr_opts[str_idx];
+            if cname == "copy" && istr.get_info().get_name() == cname {
+                self.encoders.push(OutputMode::Copy(out_id));
+            } else if cname == "any" || oopts.enc_name.as_str() == cname {
+                let enc_create = enc_reg.find_encoder(oopts.enc_name.as_str());
+                if enc_create.is_none() {
+                    println!("encoder '{}' not found", oopts.enc_name.as_str());
+                    return false;
+                }
+                let mut encoder = (enc_create.unwrap())();
+                if oopts.enc_params.format == NACodecTypeInfo::None {
+                    oopts.enc_params.format = istr.get_info().get_properties();
+                }
+                if oopts.enc_params.tb_num == 0 {
+                    oopts.enc_params.tb_num = istr.tb_num;
+                    oopts.enc_params.tb_den = istr.tb_den;
+                }
+                let ret_eparams = encoder.negotiate_format(&oopts.enc_params);
+                if ret_eparams.is_err() {
+                    println!("cannot negotiate encoding parameters");
+                    return false;
+                }
+                let ret_eparams = ret_eparams.unwrap();
+
+//todo check for params mismatch
+                let cvt = match (&oopts.enc_params.format, &ret_eparams.format) {
+                        (NACodecTypeInfo::Video(svinfo), NACodecTypeInfo::Video(dvinfo)) => {
+                            if svinfo == dvinfo {
+                                OutputConvert::None
+                            } else {
+                                let ofmt = ScaleInfo { fmt: dvinfo.format, width: dvinfo.width, height: dvinfo.height };
+                                let ret = NAScale::new(ofmt, ofmt);
+                                if ret.is_err() {
+                                    println!("cannot create scaler");
+                                    return false;
+                                }
+                                let scaler = ret.unwrap();
+                                let ret = alloc_video_buffer(*dvinfo, 4);
+                                if ret.is_err() {
+                                    println!("cannot create scaler buffer");
+                                    return false;
+                                }
+                                let cvt_buf = ret.unwrap();
+                                OutputConvert::Video(scaler, cvt_buf)
+                            }
+                        },
+                        (NACodecTypeInfo::Audio(sainfo), NACodecTypeInfo::Audio(dainfo)) => {
+                            if sainfo == dainfo {
+                                OutputConvert::None
+                            } else {
+                                let dchmap = match dainfo.channels {
+                                        1 => NAChannelMap::from_ms_mapping(0x4),
+                                        2 => NAChannelMap::from_ms_mapping(0x3),
+                                        _ => {
+println!("can't generate default channel map for {} channels", dainfo.channels);
+                                            return false;
+                                        },
+                                    };
+//todo channelmap
+                                OutputConvert::Audio(*dainfo, dchmap)
+                            }
+                        },
+                        _ => OutputConvert::None,
+                    };
+                let ret = encoder.init(out_id, ret_eparams);
+                if ret.is_err() {
+                    println!("error initialising encoder");
+                    return false;
+                }
+                out_sm.add_stream_ref(ret.unwrap());
+
+                let name = format!("output stream {}", out_id);
+                parse_and_apply_options!(encoder, &oopts.enc_opts, name);
+
+                self.encoders.push(OutputMode::Encode(out_id, encoder, cvt));
+            } else {
+println!("encoder {} is not supported by output (expected {})", istr.id, istr.get_info().get_name());
+                return false;
+            }
+        } else {
+            if cname == "any" || istr.get_info().get_name() == cname {
+                self.encoders.push(OutputMode::Copy(out_id));
+            } else {
+println!("stream {} ({}) can't be handled", istr.id, istr.get_info().get_name());
+// todo autoselect encoder?
+                return false;
+            }
+        }
+        true
+    }
+    fn map_single(&mut self, cname: &str, ctype: StreamType, src_sm: &StreamManager, out_sm: &mut StreamManager, enc_reg: &RegisteredEncoders) -> bool {
+        let mut found_stream = false;
+        for istr in src_sm.iter() {
+            if istr.get_media_type() != ctype || found_stream {
+                self.encoders.push(OutputMode::Drop);
+            } else {
+                if !self.register_output_stream(cname, istr, out_sm, enc_reg) {
+                    return false;
+                }
+                found_stream = true;
+            }
+        }
+        found_stream
+    }
+    fn negotiate_stream_map(&mut self, src_sm: &StreamManager, mux_caps: MuxerCapabilities, out_sm: &mut StreamManager, enc_reg: &RegisteredEncoders) -> bool {
+        match mux_caps {
+            MuxerCapabilities::SingleVideo(cname) => {
+                if self.no_video { return false; }
+                self.map_single(cname, StreamType::Video, src_sm, out_sm, enc_reg)
+            },
+            MuxerCapabilities::SingleAudio(cname) => {
+                if self.no_audio { return false; }
+                self.map_single(cname, StreamType::Audio, src_sm, out_sm, enc_reg)
+            },
+            MuxerCapabilities::SingleVideoAndAudio(vname, aname) => {
+                let mut found_vid = false;
+                let mut found_aud = false;
+                for istr in src_sm.iter() {
+                    if istr.get_media_type() == StreamType::Video && !found_vid && !self.no_video {
+                        if !self.register_output_stream(vname, istr, out_sm, enc_reg) {
+                            return false;
+                        }
+                        found_vid = true;
+                    } else if istr.get_media_type() == StreamType::Audio && !found_aud && !self.no_audio {
+                        if !self.register_output_stream(aname, istr, out_sm, enc_reg) {
+                            return false;
+                        }
+                        found_aud = true;
+                    } else {
+                        self.encoders.push(OutputMode::Drop);
+                    }
+                }
+                found_vid | found_aud
+            },
+            MuxerCapabilities::OnlyVideo => {
+                if self.no_video { return false; }
+
+                let mut found_vid = false;
+                for istr in src_sm.iter() {
+                    if istr.get_media_type() == StreamType::Video && !found_vid {
+                        if !self.register_output_stream("any", istr, out_sm, enc_reg) {
+                            return false;
+                        }
+                        found_vid = true;
+                    } else {
+                        self.encoders.push(OutputMode::Drop);
+                    }
+                }
+                found_vid
+            },
+            MuxerCapabilities::OnlyAudio => {
+                if self.no_audio { return false; }
+
+                let mut found_aud = false;
+                for istr in src_sm.iter() {
+                    if istr.get_media_type() == StreamType::Audio && !found_aud {
+                        if !self.register_output_stream("any", istr, out_sm, enc_reg) {
+                            return false;
+                        }
+                        found_aud = true;
+                    } else {
+                        self.encoders.push(OutputMode::Drop);
+                    }
+                }
+                found_aud
+            },
+            MuxerCapabilities::Universal => {
+                for istr in src_sm.iter() {
+                    if (istr.get_media_type() == StreamType::Video && self.no_video) ||
+                        (istr.get_media_type() == StreamType::Audio && self.no_audio) {
+                        self.encoders.push(OutputMode::Drop);
+                        continue;
+                    }
+                    if !self.register_output_stream("any", istr, out_sm, enc_reg) {
+                        return false;
+                    }
+                }
+                true
+            },
+        }
+    }
+}
+
+macro_rules! next_arg {
+    ($args: expr, $arg_idx: expr) => {
+        if $arg_idx + 1 >= $args.len() {
+            println!("codec name is required");
+        }
+        $arg_idx += 1;
+    }
+}
+
+fn main() {
+    let args: Vec<_> = env::args().collect();
+
+    if args.len() == 1 {
+        println!("usage: nihav-encoder [-noout] [-vn] [-an] input [lastpts]");
+        return;
+    }
+
+    let mut dmx_reg = RegisteredDemuxers::new();
+    nihav_register_all_demuxers(&mut dmx_reg);
+    let mut dec_reg = RegisteredDecoders::new();
+    nihav_register_all_codecs(&mut dec_reg);
+
+    let mut mux_reg = RegisteredMuxers::new();
+    nihav_register_all_muxers(&mut mux_reg);
+    let mut enc_reg = RegisteredEncoders::new();
+    nihav_register_all_encoders(&mut enc_reg);
+
+    let mut transcoder = Transcoder::new();
+
+    let mut arg_idx = 1;
+    while arg_idx < args.len() {
+        match args[arg_idx].as_str() {
+            "--query-decoder-options" => {
+                next_arg!(args, arg_idx);
+                let cname = args[arg_idx].as_str();
+                if let Some(decfunc) = dec_reg.find_decoder(cname) {
+                    let dec = (decfunc)();
+                    let opts = dec.get_supported_options();
+                    print_options(cname, opts);
+                } else {
+                    println!("codec {} is not found", cname);
+                }
+            },
+            "--query-demuxer-options" => {
+                next_arg!(args, arg_idx);
+                let dname = args[arg_idx].as_str();
+                let mut mr = MemoryReader::new_read(&[]);
+                let mut br = ByteReader::new(&mut mr);
+                if let Some(dmx_creator) = dmx_reg.find_demuxer(dname) {
+                    let dmx = dmx_creator.new_demuxer(&mut br);
+                    let opts = dmx.get_supported_options();
+                    print_options(dname, opts);
+                } else {
+                    println!("demuxer {} is not found", dname);
+                }
+            },
+            "--query-encoder-options" => {
+                next_arg!(args, arg_idx);
+                let cname = args[arg_idx].as_str();
+                if let Some(encfunc) = enc_reg.find_encoder(cname) {
+                    let enc = (encfunc)();
+                    let opts = enc.get_supported_options();
+                    print_options(cname, opts);
+                } else {
+                    println!("codec {} is not found", cname);
+                }
+            },
+            "--query-muxer-options" => {
+                next_arg!(args, arg_idx);
+                let name = args[arg_idx].as_str();
+                let mut data = [];
+                let mut mw = MemoryWriter::new_write(&mut data);
+                let mut bw = ByteWriter::new(&mut mw);
+                if let Some(mux_creator) = mux_reg.find_muxer(name) {
+                    let mux = mux_creator.new_muxer(&mut bw);
+                    let opts = mux.get_supported_options();
+                    print_options(name, opts);
+                } else {
+                    println!("muxer {} is not found", name);
+                }
+            },
+            "--input" => {
+                next_arg!(args, arg_idx);
+                transcoder.input_name = args[arg_idx].clone();
+            },
+            "--input-format" => {
+                next_arg!(args, arg_idx);
+                transcoder.input_fmt = Some(args[arg_idx].clone());
+            },
+            "--output" => {
+                next_arg!(args, arg_idx);
+                transcoder.output_name = args[arg_idx].clone();
+            },
+            "--output-format" => {
+                next_arg!(args, arg_idx);
+                transcoder.output_fmt = Some(args[arg_idx].clone());
+            },
+            "--demuxer-options" => {
+                next_arg!(args, arg_idx);
+                if !transcoder.parse_demuxer_options(&args[arg_idx], &dmx_reg) {
+                    println!("invalid demuxer option syntax");
+                    return;
+                }
+            },
+            "--no-video" => {
+                transcoder.no_video = true;
+            },
+            "--no-audio" => {
+                transcoder.no_audio = true;
+            },
+            "--muxer-options" => {
+                next_arg!(args, arg_idx);
+                if !transcoder.parse_muxer_options(&args[arg_idx], &mux_reg) {
+                    println!("invalid muxer option syntax");
+                    return;
+                }
+            },
+            _ => {
+                if args[arg_idx].starts_with("--istream") {
+                    let opt0 = &args[arg_idx];
+                    next_arg!(args, arg_idx);
+                    if !transcoder.parse_istream_options(opt0, &args[arg_idx]) {
+                        println!("invalid input stream option syntax");
+                        return;
+                    }
+                } else if args[arg_idx].starts_with("--ostream") {
+                    let opt0 = &args[arg_idx];
+                    next_arg!(args, arg_idx);
+                    if !transcoder.parse_ostream_options(opt0, &args[arg_idx], &enc_reg) {
+                        println!("invalid output stream option syntax");
+                        return;
+                    }
+                } else if args[arg_idx].starts_with("--") {
+                    println!("unknown option");
+                } else {
+                    println!("unrecognized argument");
+                }
+            },
+        };
+        arg_idx += 1;
+    }
+
+    if transcoder.input_name.len() == 0 {
+        println!("no input name provided");
+        return;
+    }
+    if transcoder.output_name.len() == 0 {
+        println!("no output name provided");
+        return;
+    }
+
+    let res = File::open(transcoder.input_name.as_str());
+    if res.is_err() {
+        println!("error opening input");
+        return;
+    }
+    let mut file = res.unwrap();
+    let mut fr = FileReader::new_read(&mut file);
+    let mut br = ByteReader::new(&mut fr);
+
+    let dmx_name = if let Some(ref str) = transcoder.input_fmt {
+            str.as_str()
+        } else {
+            if let Some((dmx_name, score)) = detect::detect_format(transcoder.input_name.as_str(), &mut br) {
+                println!("detected {} with score {:?}", dmx_name, score);
+                dmx_name
+            } else {
+                println!("cannot detect input format");
+                return;
+            }
+        };
+    let ret = dmx_reg.find_demuxer(dmx_name);
+    if ret.is_none() {
+        println!("cannot find demuxer for '{}'", dmx_name);
+        return;
+    }
+    let dmx_fact = ret.unwrap();
+    br.seek(SeekFrom::Start(0)).unwrap();
+    let mut dmx = create_demuxer(dmx_fact, &mut br).unwrap();
+    parse_and_apply_options!(dmx, &transcoder.demux_opts, "input");
+    for i in 0..dmx.get_num_streams() {
+        let s = dmx.get_stream(i).unwrap();
+        let info = s.get_info();
+        let decfunc = dec_reg.find_decoder(info.get_name());
+println!("stream {} - {} {}", i, s, info.get_name());
+        let str_id = s.get_num() as u32;
+        if let Some(create_dec) = decfunc {
+            let mut dec = (create_dec)();
+            let mut dsupp = Box::new(NADecoderSupport::new());
+            let ret = dec.init(&mut dsupp, info.clone());
+            if ret.is_err() {
+                println!("Error initialising decoder '{}' for stream {}", info.get_name(), str_id);
+                return;
+            }
+            transcoder.apply_decoder_options(dec.as_mut(), str_id);
+            transcoder.decoders.push(Some((dsupp, dec)));
+        } else {
+            println!("No decoder for stream {} ({}) is found", str_id, info.get_name());
+            transcoder.decoders.push(None);
+        }
+    }
+
+    let output_fmt = if let Some(ref str) = transcoder.output_fmt {
+            str
+        } else {
+            if let Some(str) = detect::detect_format_by_name(transcoder.output_name.as_str()) {
+                str
+            } else {
+                println!("Cannot guess muxer for output");
+                return;
+            }
+        };
+    let ret = mux_reg.find_muxer(output_fmt);
+    let ofmt = output_fmt.to_string();
+
+    if ret.is_none() {
+        println!("cannot find muxer '{}'", output_fmt);
+    }
+    let mux_creator = ret.unwrap();
+
+    let mux_caps = mux_creator.get_capabilities();
+    let mut out_sm = StreamManager::new();
+    if !transcoder.negotiate_stream_map(dmx.get_stream_manager(), mux_caps, &mut out_sm, &enc_reg) {
+        println!("cannot determine stream map");
+        return;
+    }
+
+    let ret = File::create(transcoder.output_name.as_str());
+    if ret.is_err() {
+        println!("cannot open output file");
+        return;
+    }
+    let mut fw = FileWriter::new_write(ret.unwrap());
+    let mut bw = ByteWriter::new(&mut fw);
+    let ret = create_muxer(mux_creator, out_sm, &mut bw);
+    if let Err(err) = ret {
+        println!("cannot create muxer instance {:?}", err);
+        return;
+    }
+    let mut mux = ret.unwrap();
+    parse_and_apply_options!(mux, &transcoder.mux_opts, "output");
+
+    println!("Output {} muxer {}", transcoder.output_name, ofmt);
+    for ostr in mux.get_streams() {
+        println!(" #{}: {} {}", ostr.get_num(), ostr, ostr.get_info().get_name());
+    }
+
+    loop {
+        let pktres = dmx.get_frame();
+        if let Err(DemuxerError::EOF) = pktres { break; }
+        if pktres.is_err() {
+            println!("demuxing error");
+            break;
+        }
+        let mut pkt = pktres.unwrap();
+        let src_id = pkt.get_stream().get_num();
+        match transcoder.encoders[src_id] {
+            OutputMode::Drop => {},
+            OutputMode::Copy(dst_id) => {
+                let dstr = mux.get_stream(dst_id as usize).unwrap();
+                pkt.reassign(dstr, pkt.get_time_information());
+                if mux.mux_frame(pkt).is_err() {
+                    println!("error muxing packet");
+                    break;
+                }
+            },
+            OutputMode::Encode(dst_id, ref mut encoder, ref mut cvt) => {
+                if let Some((ref mut dsupp, ref mut decoder)) = transcoder.decoders[src_id] {
+                    let ret = decoder.decode(dsupp, &pkt);
+                    if ret.is_err() {
+                        println!("error decoding stream {}", src_id);
+                        break;
+                    }
+                    let frm = ret.unwrap();
+                    let buf = frm.get_buffer();
+                    let cbuf = match cvt {
+                            OutputConvert::None => buf,
+                            OutputConvert::Video(ref mut scaler, ref mut dbuf) => {
+                                let cur_ifmt = get_scale_fmt_from_pic(&buf);
+                                let last_ifmt = scaler.get_in_fmt();
+                                if cur_ifmt != last_ifmt {
+                                    let ofmt = scaler.get_out_fmt();
+                                    let ret = NAScale::new(cur_ifmt, ofmt);
+                                    if ret.is_err() {
+                                        println!("error re-initialising scaler for {} -> {}", cur_ifmt, ofmt);
+                                        break;
+                                    }
+                                    *scaler = ret.unwrap();
+                                }
+                                let ret = scaler.convert(&buf, dbuf);
+                                if ret.is_err() {
+                                    println!("error converting frame for encoding");
+                                    break;
+                                }
+                                dbuf.clone()
+                            },
+                            OutputConvert::Audio(ref dinfo, ref dchmap) => {
+                                let ret = convert_audio_frame(&buf, dinfo, dchmap);
+                                if ret.is_err() {
+                                    println!("error converting audio for stream {}", dst_id);
+                                    break;
+                                }
+                                ret.unwrap()
+                            },
+                        };
+                    let cfrm = NAFrame::new(frm.get_time_information(), frm.frame_type, frm.key, frm.get_info(), cbuf);
+                    encoder.encode(&cfrm).unwrap();
+                    while let Ok(Some(pkt)) = encoder.get_packet() {
+                        mux.mux_frame(pkt).unwrap();
+                    }
+                } else {
+                    println!("no decoder for stream {}", src_id);
+                    break;
+                }
+            },
+        };
+    }
+    'flush_loop: for enc in transcoder.encoders.iter_mut() {
+        match enc {
+            OutputMode::Encode(str_id, ref mut encoder, _) => {
+                let ret = encoder.flush();
+                if ret.is_err() {
+                    println!("error flushing encoder for stream {}", str_id);
+                    break;
+                } else {
+                    while let Ok(Some(pkt)) = encoder.get_packet() {
+                        if mux.mux_frame(pkt).is_err() {
+                            println!("error muxing packet");
+                            break 'flush_loop;
+                        }
+                    }
+                }
+            },
+            _ => {},
+        };
+    }
+
+    let ret = mux.end();
+    if ret.is_err() {
+        println!("error at finalising muxing");
+    }
+}