lavfi: add trim and atrim filters.

15 files changed, 605 insertions, 0 deletions

diff --git a/Changelog b/Changelog
index f74295c010..23ed1b4cce 100644
--- a/Changelog
+++ b/Changelog
@@ -13,6 +13,7 @@ version 10:
 - new interlace filter
 - JPEG 2000 decoder
 - new asetpts filter (same as setpts, but for audio)
+- new trim and atrim filters
 
 
 version 9:
diff --git a/doc/filters.texi b/doc/filters.texi
index 0a36f5f1e0..2ee5ad556e 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -345,6 +345,70 @@ with a negative pts due to encoder delay.
 
 @end table
 
+@section atrim
+Trim the input so that the output contains one continuous subpart of the input.
+
+This filter accepts the following options:
+@table @option
+@item start
+Timestamp (in seconds) of the start of the kept section. I.e. the audio sample
+with the timestamp @var{start} will be the first sample in the output.
+
+@item end
+Timestamp (in seconds) of the first audio sample that will be dropped. I.e. the
+audio sample immediately preceding the one with the timestamp @var{end} will be
+the last sample in the output.
+
+@item start_pts
+Same as @var{start}, except this option sets the start timestamp in samples
+instead of seconds.
+
+@item end_pts
+Same as @var{end}, except this option sets the end timestamp in samples instead
+of seconds.
+
+@item duration
+Maximum duration of the output in seconds.
+
+@item start_sample
+Number of the first sample that should be passed to output.
+
+@item end_sample
+Number of the first sample that should be dropped.
+@end table
+
+Note that the first two sets of the start/end options and the @option{duration}
+option look at the frame timestamp, while the _sample options simply count the
+samples that pass through the filter. So start/end_pts and start/end_sample will
+give different results when the timestamps are wrong, inexact or do not start at
+zero. Also note that this filter does not modify the timestamps. If you wish
+that the output timestamps start at zero, insert the asetpts filter after the
+atrim filter.
+
+If multiple start or end options are set, this filter tries to be greedy and
+keep all samples that match at least one of the specified constraints. To keep
+only the part that matches all the constraints at once, chain multiple atrim
+filters.
+
+The defaults are such that all the input is kept. So it is possible to set e.g.
+just the end values to keep everything before the specified time.
+
+Examples:
+@itemize
+@item
+drop everything except the second minute of input
+@example
+avconv -i INPUT -af atrim=60:120
+@end example
+
+@item
+keep only the first 1000 samples
+@example
+avconv -i INPUT -af atrim=end_sample=1000
+@end example
+
+@end itemize
+
 @section channelsplit
 Split each channel in input audio stream into a separate output stream.
 
@@ -2251,6 +2315,67 @@ l.r     l.L
 @end example
 @end table
 
+@section trim
+Trim the input so that the output contains one continuous subpart of the input.
+
+This filter accepts the following options:
+@table @option
+@item start
+Timestamp (in seconds) of the start of the kept section. I.e. the frame with the
+timestamp @var{start} will be the first frame in the output.
+
+@item end
+Timestamp (in seconds) of the first frame that will be dropped. I.e. the frame
+immediately preceding the one with the timestamp @var{end} will be the last
+frame in the output.
+
+@item start_pts
+Same as @var{start}, except this option sets the start timestamp in timebase
+units instead of seconds.
+
+@item end_pts
+Same as @var{end}, except this option sets the end timestamp in timebase units
+instead of seconds.
+
+@item duration
+Maximum duration of the output in seconds.
+
+@item start_frame
+Number of the first frame that should be passed to output.
+
+@item end_frame
+Number of the first frame that should be dropped.
+@end table
+
+Note that the first two sets of the start/end options and the @option{duration}
+option look at the frame timestamp, while the _frame variants simply count the
+frames that pass through the filter. Also note that this filter does not modify
+the timestamps. If you wish that the output timestamps start at zero, insert a
+setpts filter after the trim filter.
+
+If multiple start or end options are set, this filter tries to be greedy and
+keep all the frames that match at least one of the specified constraints. To keep
+only the part that matches all the constraints at once, chain multiple trim
+filters.
+
+The defaults are such that all the input is kept. So it is possible to set e.g.
+just the end values to keep everything before the specified time.
+
+Examples:
+@itemize
+@item
+drop everything except the second minute of input
+@example
+avconv -i INPUT -vf trim=60:120
+@end example
+
+@item
+keep only the first second
+@example
+avconv -i INPUT -vf trim=duration=1
+@end example
+
+@end itemize
 @section unsharp
 
 Sharpen or blur the input video.
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 662dcecfd2..7555b49428 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -31,6 +31,7 @@ OBJS-$(CONFIG_ASETPTS_FILTER)                += setpts.o
 OBJS-$(CONFIG_ASHOWINFO_FILTER)              += af_ashowinfo.o
 OBJS-$(CONFIG_ASPLIT_FILTER)                 += split.o
 OBJS-$(CONFIG_ASYNCTS_FILTER)                += af_asyncts.o
+OBJS-$(CONFIG_ATRIM_FILTER)                  += trim.o
 OBJS-$(CONFIG_CHANNELMAP_FILTER)             += af_channelmap.o
 OBJS-$(CONFIG_CHANNELSPLIT_FILTER)           += af_channelsplit.o
 OBJS-$(CONFIG_JOIN_FILTER)                   += af_join.o
@@ -77,6 +78,7 @@ OBJS-$(CONFIG_SETTB_FILTER)                  += vf_settb.o
 OBJS-$(CONFIG_SHOWINFO_FILTER)               += vf_showinfo.o
 OBJS-$(CONFIG_SPLIT_FILTER)                  += split.o
 OBJS-$(CONFIG_TRANSPOSE_FILTER)              += vf_transpose.o
+OBJS-$(CONFIG_TRIM_FILTER)                   += trim.o
 OBJS-$(CONFIG_UNSHARP_FILTER)                += vf_unsharp.o
 OBJS-$(CONFIG_VFLIP_FILTER)                  += vf_vflip.o
 OBJS-$(CONFIG_YADIF_FILTER)                  += vf_yadif.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index d3802722d9..20407ced22 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -51,6 +51,7 @@ void avfilter_register_all(void)
     REGISTER_FILTER(ASHOWINFO,      ashowinfo,      af);
     REGISTER_FILTER(ASPLIT,         asplit,         af);
     REGISTER_FILTER(ASYNCTS,        asyncts,        af);
+    REGISTER_FILTER(ATRIM,          atrim,          af);
     REGISTER_FILTER(CHANNELMAP,     channelmap,     af);
     REGISTER_FILTER(CHANNELSPLIT,   channelsplit,   af);
     REGISTER_FILTER(JOIN,           join,           af);
@@ -97,6 +98,7 @@ void avfilter_register_all(void)
     REGISTER_FILTER(SHOWINFO,       showinfo,       vf);
     REGISTER_FILTER(SPLIT,          split,          vf);
     REGISTER_FILTER(TRANSPOSE,      transpose,      vf);
+    REGISTER_FILTER(TRIM,           trim,           vf);
     REGISTER_FILTER(UNSHARP,        unsharp,        vf);
     REGISTER_FILTER(VFLIP,          vflip,          vf);
     REGISTER_FILTER(YADIF,          yadif,          vf);
diff --git a/libavfilter/trim.c b/libavfilter/trim.c
new file mode 100644
index 0000000000..9a0544d1d1
--- /dev/null
+++ b/libavfilter/trim.c
@@ -0,0 +1,407 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <float.h>
+#include <math.h>
+
+#include "config.h"
+
+#include "libavutil/avassert.h"
+#include "libavutil/channel_layout.h"
+#include "libavutil/common.h"
+#include "libavutil/log.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/opt.h"
+#include "libavutil/samplefmt.h"
+
+#include "audio.h"
+#include "avfilter.h"
+#include "internal.h"
+
+typedef struct TrimContext {
+    const AVClass *class;
+
+    /*
+     * AVOptions
+     */
+    double duration;
+    double start_time, end_time;
+    int64_t start_frame, end_frame;
+    /*
+     * in the link timebase for video,
+     * in 1/samplerate for audio
+     */
+    int64_t start_pts, end_pts;
+    int64_t start_sample, end_sample;
+
+    /*
+     * number of video frames that arrived on this filter so far
+     */
+    int64_t nb_frames;
+    /*
+     * number of audio samples that arrived on this filter so far
+     */
+    int64_t nb_samples;
+    /*
+     * timestamp of the first frame in the output, in the timebase units
+     */
+    int64_t first_pts;
+    /*
+     * duration in the timebase units
+     */
+    int64_t duration_tb;
+
+    int64_t next_pts;
+
+    int eof;
+    int got_output;
+} TrimContext;
+
+static int init(AVFilterContext *ctx)
+{
+    TrimContext *s = ctx->priv;
+
+    s->first_pts = AV_NOPTS_VALUE;
+
+    return 0;
+}
+
+static int config_input(AVFilterLink *inlink)
+{
+    AVFilterContext *ctx = inlink->dst;
+    TrimContext       *s = ctx->priv;
+    AVRational tb = (inlink->type == AVMEDIA_TYPE_VIDEO) ?
+                     inlink->time_base : (AVRational){ 1, inlink->sample_rate };
+
+    if (s->start_time != DBL_MAX) {
+        int64_t start_pts = lrintf(s->start_time / av_q2d(tb));
+        if (s->start_pts == AV_NOPTS_VALUE || start_pts < s->start_pts)
+            s->start_pts = start_pts;
+    }
+    if (s->end_time != DBL_MAX) {
+        int64_t end_pts = lrintf(s->end_time / av_q2d(tb));
+        if (s->end_pts == AV_NOPTS_VALUE || end_pts > s->end_pts)
+            s->end_pts = end_pts;
+    }
+    if (s->duration)
+        s->duration_tb = lrintf(s->duration / av_q2d(tb));
+
+    return 0;
+}
+
+static int request_frame(AVFilterLink *outlink)
+{
+    AVFilterContext *ctx = outlink->src;
+    TrimContext       *s = ctx->priv;
+    int ret;
+
+    s->got_output = 0;
+    while (!s->got_output) {
+        if (s->eof)
+            return AVERROR_EOF;
+
+        ret = ff_request_frame(ctx->inputs[0]);
+        if (ret < 0)
+            return ret;
+    }
+
+    return 0;
+}
+
+#define OFFSET(x) offsetof(TrimContext, x)
+#define COMMON_OPTS                                                                                                                                                         \
+    { "start",       "Timestamp in seconds of the first frame that "                                                                                                        \
+        "should be passed",                                              OFFSET(start_time),  AV_OPT_TYPE_DOUBLE, { .dbl = DBL_MAX },       -DBL_MAX, DBL_MAX,     FLAGS }, \
+    { "end",         "Timestamp in seconds of the first frame that "                                                                                                        \
+        "should be dropped again",                                       OFFSET(end_time),    AV_OPT_TYPE_DOUBLE, { .dbl = DBL_MAX },       -DBL_MAX, DBL_MAX,     FLAGS }, \
+    { "start_pts",   "Timestamp of the first frame that should be "                                                                                                         \
+       " passed",                                                        OFFSET(start_pts),   AV_OPT_TYPE_INT64,  { .i64 = AV_NOPTS_VALUE }, INT64_MIN, INT64_MAX, FLAGS }, \
+    { "end_pts",     "Timestamp of the first frame that should be "                                                                                                         \
+        "dropped again",                                                 OFFSET(end_pts),     AV_OPT_TYPE_INT64,  { .i64 = AV_NOPTS_VALUE }, INT64_MIN, INT64_MAX, FLAGS }, \
+    { "duration",    "Maximum duration of the output in seconds",        OFFSET(duration),    AV_OPT_TYPE_DOUBLE, { .dbl = 0 },                      0,   DBL_MAX, FLAGS },
+
+
+#if CONFIG_TRIM_FILTER
+static int trim_filter_frame(AVFilterLink *inlink, AVFrame *frame)
+{
+    AVFilterContext *ctx = inlink->dst;
+    TrimContext       *s = ctx->priv;
+    int drop;
+
+    /* drop everything if EOF has already been returned */
+    if (s->eof) {
+        av_frame_free(&frame);
+        return 0;
+    }
+
+    if (s->start_frame >= 0 || s->start_pts != AV_NOPTS_VALUE) {
+        drop = 1;
+        if (s->start_frame >= 0 && s->nb_frames >= s->start_frame)
+            drop = 0;
+        if (s->start_pts != AV_NOPTS_VALUE && frame->pts != AV_NOPTS_VALUE &&
+            frame->pts >= s->start_pts)
+            drop = 0;
+        if (drop)
+            goto drop;
+    }
+
+    if (s->first_pts == AV_NOPTS_VALUE && frame->pts != AV_NOPTS_VALUE)
+        s->first_pts = frame->pts;
+
+    if (s->end_frame != INT64_MAX || s->end_pts != AV_NOPTS_VALUE || s->duration_tb) {
+        drop = 1;
+
+        if (s->end_frame != INT64_MAX && s->nb_frames < s->end_frame)
+            drop = 0;
+        if (s->end_pts != AV_NOPTS_VALUE && frame->pts != AV_NOPTS_VALUE &&
+            frame->pts < s->end_pts)
+            drop = 0;
+        if (s->duration_tb && frame->pts != AV_NOPTS_VALUE &&
+            frame->pts - s->first_pts < s->duration_tb)
+            drop = 0;
+
+        if (drop) {
+            s->eof = 1;
+            goto drop;
+        }
+    }
+
+    s->nb_frames++;
+    s->got_output = 1;
+
+    return ff_filter_frame(ctx->outputs[0], frame);
+
+drop:
+    s->nb_frames++;
+    av_frame_free(&frame);
+    return 0;
+}
+
+#define FLAGS AV_OPT_FLAG_VIDEO_PARAM
+static const AVOption trim_options[] = {
+    COMMON_OPTS
+    { "start_frame", "Number of the first frame that should be passed "
+        "to the output",                                                 OFFSET(start_frame), AV_OPT_TYPE_INT64,  { .i64 = -1 },       -1, INT64_MAX, FLAGS },
+    { "end_frame",   "Number of the first frame that should be dropped "
+        "again",                                                         OFFSET(end_frame),   AV_OPT_TYPE_INT64,  { .i64 = INT64_MAX }, 0, INT64_MAX, FLAGS },
+    { NULL },
+};
+#undef FLAGS
+
+static const AVClass trim_class = {
+    .class_name = "trim",
+    .item_name  = av_default_item_name,
+    .option     = trim_options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+static const AVFilterPad trim_inputs[] = {
+    {
+        .name         = "default",
+        .type         = AVMEDIA_TYPE_VIDEO,
+        .filter_frame = trim_filter_frame,
+        .config_props = config_input,
+    },
+    { NULL }
+};
+
+static const AVFilterPad trim_outputs[] = {
+    {
+        .name          = "default",
+        .type          = AVMEDIA_TYPE_VIDEO,
+        .request_frame = request_frame,
+    },
+    { NULL }
+};
+
+AVFilter avfilter_vf_trim = {
+    .name        = "trim",
+    .description = NULL_IF_CONFIG_SMALL("Pick one continuous section from the input, drop the rest."),
+
+    .init        = init,
+
+    .priv_size   = sizeof(TrimContext),
+    .priv_class  = &trim_class,
+
+    .inputs      = trim_inputs,
+    .outputs     = trim_outputs,
+};
+#endif // CONFIG_TRIM_FILTER
+
+#if CONFIG_ATRIM_FILTER
+static int atrim_filter_frame(AVFilterLink *inlink, AVFrame *frame)
+{
+    AVFilterContext *ctx = inlink->dst;
+    TrimContext       *s = ctx->priv;
+    int64_t start_sample, end_sample = frame->nb_samples;
+    int64_t pts;
+    int drop;
+
+    /* drop everything if EOF has already been returned */
+    if (s->eof) {
+        av_frame_free(&frame);
+        return 0;
+    }
+
+    if (frame->pts != AV_NOPTS_VALUE)
+        pts = av_rescale_q(frame->pts, inlink->time_base,
+                           (AVRational){ 1, inlink->sample_rate });
+    else
+        pts = s->next_pts;
+    s->next_pts = pts + frame->nb_samples;
+
+    /* check if at least a part of the frame is after the start time */
+    if (s->start_sample < 0 && s->start_pts == AV_NOPTS_VALUE) {
+        start_sample = 0;
+    } else {
+        drop = 1;
+        start_sample = frame->nb_samples;
+
+        if (s->start_sample >= 0 &&
+            s->nb_samples + frame->nb_samples > s->start_sample) {
+            drop         = 0;
+            start_sample = FFMIN(start_sample, s->start_sample - s->nb_samples);
+        }
+
+        if (s->start_pts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE &&
+            pts + frame->nb_samples > s->start_pts) {
+            drop = 0;
+            start_sample = FFMIN(start_sample, s->start_pts - pts);
+        }
+
+        if (drop)
+            goto drop;
+    }
+
+    if (s->first_pts == AV_NOPTS_VALUE)
+        s->first_pts = pts + start_sample;
+
+    /* check if at least a part of the frame is before the end time */
+    if (s->end_sample == INT64_MAX && s->end_pts == AV_NOPTS_VALUE && !s->duration_tb) {
+        end_sample = frame->nb_samples;
+    } else {
+        drop       = 1;
+        end_sample = 0;
+
+        if (s->end_sample != INT64_MAX &&
+            s->nb_samples < s->end_sample) {
+            drop       = 0;
+            end_sample = FFMAX(end_sample, s->end_sample - s->nb_samples);
+        }
+
+        if (s->end_pts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE &&
+            pts < s->end_pts) {
+            drop       = 0;
+            end_sample = FFMAX(end_sample, s->end_pts - pts);
+        }
+
+        if (s->duration_tb && pts - s->first_pts < s->duration_tb) {
+            drop       = 0;
+            end_sample = FFMAX(end_sample, s->first_pts + s->duration_tb - pts);
+        }
+
+        if (drop) {
+            s->eof = 1;
+            goto drop;
+        }
+    }
+
+    s->nb_samples += frame->nb_samples;
+    start_sample   = FFMAX(0, start_sample);
+    end_sample     = FFMIN(frame->nb_samples, end_sample);
+    av_assert0(start_sample < end_sample);
+
+    if (start_sample) {
+        AVFrame *out = ff_get_audio_buffer(ctx->outputs[0], end_sample - start_sample);
+        if (!out) {
+            av_frame_free(&frame);
+            return AVERROR(ENOMEM);
+        }
+
+        av_frame_copy_props(out, frame);
+        av_samples_copy(out->extended_data, frame->extended_data, 0, start_sample,
+                        out->nb_samples, av_get_channel_layout_nb_channels(frame->channel_layout),
+                        frame->format);
+        if (out->pts != AV_NOPTS_VALUE)
+            out->pts += av_rescale_q(start_sample, (AVRational){ 1, out->sample_rate },
+                                     inlink->time_base);
+
+        av_frame_free(&frame);
+        frame = out;
+    } else
+        frame->nb_samples = end_sample;
+
+    s->got_output = 1;
+    return ff_filter_frame(ctx->outputs[0], frame);
+
+drop:
+    s->nb_samples += frame->nb_samples;
+    av_frame_free(&frame);
+    return 0;
+}
+
+#define FLAGS AV_OPT_FLAG_AUDIO_PARAM
+static const AVOption atrim_options[] = {
+    COMMON_OPTS
+    { "start_sample", "Number of the first audio sample that should be "
+        "passed to the output",                                          OFFSET(start_sample), AV_OPT_TYPE_INT64,  { .i64 = -1 },       -1, INT64_MAX, FLAGS },
+    { "end_sample",   "Number of the first audio sample that should be "
+        "dropped again",                                                 OFFSET(end_sample),   AV_OPT_TYPE_INT64,  { .i64 = INT64_MAX }, 0, INT64_MAX, FLAGS },
+    { NULL },
+};
+#undef FLAGS
+
+static const AVClass atrim_class = {
+    .class_name = "atrim",
+    .item_name  = av_default_item_name,
+    .option     = atrim_options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+static const AVFilterPad atrim_inputs[] = {
+    {
+        .name         = "default",
+        .type         = AVMEDIA_TYPE_AUDIO,
+        .filter_frame = atrim_filter_frame,
+        .config_props = config_input,
+    },
+    { NULL }
+};
+
+static const AVFilterPad atrim_outputs[] = {
+    {
+        .name          = "default",
+        .type          = AVMEDIA_TYPE_AUDIO,
+        .request_frame = request_frame,
+    },
+    { NULL }
+};
+
+AVFilter avfilter_af_atrim = {
+    .name        = "atrim",
+    .description = NULL_IF_CONFIG_SMALL("Pick one continuous section from the input, drop the rest."),
+
+    .init        = init,
+
+    .priv_size   = sizeof(TrimContext),
+    .priv_class  = &atrim_class,
+
+    .inputs      = atrim_inputs,
+    .outputs     = atrim_outputs,
+};
+#endif // CONFIG_ATRIM_FILTER
diff --git a/tests/fate/filter-audio.mak b/tests/fate/filter-audio.mak
index 7f1a056f9a..ac025c4b08 100644
--- a/tests/fate/filter-audio.mak
+++ b/tests/fate/filter-audio.mak
@@ -25,6 +25,22 @@ fate-filter-asyncts: CMD = pcm -analyzeduration 10000000 -i $(SRC) -af asyncts
 fate-filter-asyncts: CMP = oneoff
 fate-filter-asyncts: REF = $(SAMPLES)/nellymoser/nellymoser-discont.pcm
 
+FATE_ATRIM += fate-filter-atrim-duration
+fate-filter-atrim-duration: CMD = framecrc -i $(SRC) -af atrim=start=0.1:duration=0.01
+FATE_ATRIM += fate-filter-atrim-mixed
+fate-filter-atrim-mixed: CMD = framecrc -i $(SRC) -af atrim=start=0.05:start_sample=1025:end=0.1:end_sample=4411
+
+FATE_ATRIM += fate-filter-atrim-samples
+fate-filter-atrim-samples: CMD = framecrc -i $(SRC) -af atrim=start_sample=26:end_sample=80
+
+FATE_ATRIM += fate-filter-atrim-time
+fate-filter-atrim-time: CMD = framecrc -i $(SRC) -af atrim=0.1:0.2
+
+$(FATE_ATRIM): tests/data/asynth-44100-2.wav
+$(FATE_ATRIM): SRC = $(TARGET_PATH)/tests/data/asynth-44100-2.wav
+
+FATE_FILTER-$(call FILTERDEMDECENCMUX, ATRIM, WAV, PCM_S16LE, PCM_S16LE, WAV) += $(FATE_ATRIM)
+
 FATE_AFILTER-$(call FILTERDEMDECENCMUX, CHANNELMAP, WAV, PCM_S16LE, PCM_S16LE, WAV) += fate-filter-channelmap
 fate-filter-channelmap: SRC = $(TARGET_PATH)/tests/data/asynth-44100-6.wav
 fate-filter-channelmap: tests/data/asynth-44100-6.wav
diff --git a/tests/fate/filter-video.mak b/tests/fate/filter-video.mak
index c85161ac81..ed4c70af15 100644
--- a/tests/fate/filter-video.mak
+++ b/tests/fate/filter-video.mak
@@ -42,6 +42,20 @@ fate-filter-setpts: CMD = framecrc -c:v pgmyuv -i $(SRC) -filter_script $(SRC_PA
 FATE_FILTER_VSYNTH-$(CONFIG_TRANSPOSE_FILTER) += fate-filter-transpose
 fate-filter-transpose: CMD = framecrc -c:v pgmyuv -i $(SRC) -vf transpose
 
+FATE_TRIM += fate-filter-trim-duration
+fate-filter-trim-duration: CMD = framecrc -i $(SRC) -vf trim=start=0.4:duration=0.05
+
+FATE_TRIM += fate-filter-trim-frame
+fate-filter-trim-frame: CMD = framecrc -i $(SRC) -vf trim=start_frame=3:end_frame=10
+
+FATE_TRIM += fate-filter-trim-mixed
+fate-filter-trim-mixed: CMD = framecrc -i $(SRC) -vf trim=start=0.2:end=0.4:start_frame=1:end_frame=3
+
+FATE_TRIM += fate-filter-trim-time
+fate-filter-trim-time: CMD = framecrc -i $(SRC) -vf trim=0:0.1
+
+FATE_FILTER_VSYNTH-$(CONFIG_TRIM_FILTER) += $(FATE_TRIM)
+
 FATE_FILTER_VSYNTH-$(CONFIG_UNSHARP_FILTER) += fate-filter-unsharp
 fate-filter-unsharp: CMD = framecrc -c:v pgmyuv -i $(SRC) -vf unsharp
 
diff --git a/tests/ref/fate/filter-atrim-duration b/tests/ref/fate/filter-atrim-duration
new file mode 100644
index 0000000000..a51dff7dfd
--- /dev/null
+++ b/tests/ref/fate/filter-atrim-duration
@@ -0,0 +1,2 @@
+#tb 0: 1/44100
+0,       4410,       4410,      441,     1764, 0x61e374f7
diff --git a/tests/ref/fate/filter-atrim-mixed b/tests/ref/fate/filter-atrim-mixed
new file mode 100644
index 0000000000..ae3281a1a8
--- /dev/null
+++ b/tests/ref/fate/filter-atrim-mixed
@@ -0,0 +1,5 @@
+#tb 0: 1/44100
+0,       1025,       1025,     1023,     4092, 0x78560a4c
+0,       2048,       2048,     1024,     4096, 0xc477fa99
+0,       3072,       3072,     1024,     4096, 0x3bc0f14f
+0,       4096,       4096,      315,     1260, 0xe4b26b50
diff --git a/tests/ref/fate/filter-atrim-samples b/tests/ref/fate/filter-atrim-samples
new file mode 100644
index 0000000000..3461666394
--- /dev/null
+++ b/tests/ref/fate/filter-atrim-samples
@@ -0,0 +1,2 @@
+#tb 0: 1/44100
+0,         26,         26,       54,      216, 0x6b376c6c
diff --git a/tests/ref/fate/filter-atrim-time b/tests/ref/fate/filter-atrim-time
new file mode 100644
index 0000000000..a3682101ce
--- /dev/null
+++ b/tests/ref/fate/filter-atrim-time
@@ -0,0 +1,6 @@
+#tb 0: 1/44100
+0,       4410,       4410,      710,     2840, 0x658982a3
+0,       5120,       5120,     1024,     4096, 0xfd6a0070
+0,       6144,       6144,     1024,     4096, 0x0b01f4cf
+0,       7168,       7168,     1024,     4096, 0x6716fd93
+0,       8192,       8192,      628,     2512, 0xda5ddff8
diff --git a/tests/ref/fate/filter-trim-duration b/tests/ref/fate/filter-trim-duration
new file mode 100644
index 0000000000..db74add00e
--- /dev/null
+++ b/tests/ref/fate/filter-trim-duration
@@ -0,0 +1,2 @@
+#tb 0: 1/25
+0,         10,         10,        1,   152064, 0xb45c4760
diff --git a/tests/ref/fate/filter-trim-frame b/tests/ref/fate/filter-trim-frame
new file mode 100644
index 0000000000..1749afd38b
--- /dev/null
+++ b/tests/ref/fate/filter-trim-frame
@@ -0,0 +1,8 @@
+#tb 0: 1/25
+0,          3,          3,        1,   152064, 0xceb080b0
+0,          4,          4,        1,   152064, 0x473db652
+0,          5,          5,        1,   152064, 0x287da8e6
+0,          6,          6,        1,   152064, 0x68b47c23
+0,          7,          7,        1,   152064, 0xe9028bac
+0,          8,          8,        1,   152064, 0x28ff8026
+0,          9,          9,        1,   152064, 0x2d7c3915
diff --git a/tests/ref/fate/filter-trim-mixed b/tests/ref/fate/filter-trim-mixed
new file mode 100644
index 0000000000..5e003f665a
--- /dev/null
+++ b/tests/ref/fate/filter-trim-mixed
@@ -0,0 +1,10 @@
+#tb 0: 1/25
+0,          1,          1,        1,   152064, 0x7f5f6551
+0,          2,          2,        1,   152064, 0xc566f64a
+0,          3,          3,        1,   152064, 0xceb080b0
+0,          4,          4,        1,   152064, 0x473db652
+0,          5,          5,        1,   152064, 0x287da8e6
+0,          6,          6,        1,   152064, 0x68b47c23
+0,          7,          7,        1,   152064, 0xe9028bac
+0,          8,          8,        1,   152064, 0x28ff8026
+0,          9,          9,        1,   152064, 0x2d7c3915
diff --git a/tests/ref/fate/filter-trim-time b/tests/ref/fate/filter-trim-time
new file mode 100644
index 0000000000..2f860258bd
--- /dev/null
+++ b/tests/ref/fate/filter-trim-time
@@ -0,0 +1,3 @@
+#tb 0: 1/25
+0,          0,          0,        1,   152064, 0x6e4f89ef
+0,          1,          1,        1,   152064, 0x7f5f6551