diff mbox

[FFmpeg-devel,4/4] lavfi: remove af_asynts filter

Message ID 20170306024651.66336-4-atomnuker@gmail.com
State Accepted
Headers show

Commit Message

Rostislav Pehlivanov March 6, 2017, 2:46 a.m. UTC
Long overdue for removal, af_aresample should be used instead.

Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>
---
 Changelog                   |   1 +
 configure                   |   2 -
 doc/filters.texi            |  33 -----
 libavfilter/Makefile        |   1 -
 libavfilter/af_asyncts.c    | 323 --------------------------------------------
 libavfilter/allfilters.c    |   1 -
 libavfilter/version.h       |   2 +-
 tests/fate/filter-audio.mak |   6 -
 8 files changed, 2 insertions(+), 367 deletions(-)
 delete mode 100644 libavfilter/af_asyncts.c

Comments

Marton Balint March 6, 2017, 8:47 p.m. UTC | #1
On Mon, 6 Mar 2017, Rostislav Pehlivanov wrote:

> Long overdue for removal, af_aresample should be used instead.
>
> Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>
> ---
> Changelog                   |   1 +
> configure                   |   2 -
> doc/filters.texi            |  33 -----
> libavfilter/Makefile        |   1 -
> libavfilter/af_asyncts.c    | 323 --------------------------------------------
> libavfilter/allfilters.c    |   1 -
> libavfilter/version.h       |   2 +-
> tests/fate/filter-audio.mak |   6 -
> 8 files changed, 2 insertions(+), 367 deletions(-)
> delete mode 100644 libavfilter/af_asyncts.c
>
> diff --git a/Changelog b/Changelog
> index 13628ca28b..88e188bacb 100644
> --- a/Changelog
> +++ b/Changelog
> @@ -2,6 +2,7 @@ Entries are sorted chronologically from oldest to youngest within each release,
> releases are sorted from youngest to oldest.
> 
> version <next>:
> +- Removed asyncts filter (use af_aresample instead)

Entires are sorted from oldest to youngest :P

Thanks for the cleanup.

Regards,
Marton
Rostislav Pehlivanov March 16, 2017, 7:02 a.m. UTC | #2
On 6 March 2017 at 20:47, Marton Balint <cus@passwd.hu> wrote:

>
> On Mon, 6 Mar 2017, Rostislav Pehlivanov wrote:
>
> Long overdue for removal, af_aresample should be used instead.
>>
>> Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>
>> ---
>> Changelog                   |   1 +
>> configure                   |   2 -
>> doc/filters.texi            |  33 -----
>> libavfilter/Makefile        |   1 -
>> libavfilter/af_asyncts.c    | 323 ------------------------------
>> --------------
>> libavfilter/allfilters.c    |   1 -
>> libavfilter/version.h       |   2 +-
>> tests/fate/filter-audio.mak |   6 -
>> 8 files changed, 2 insertions(+), 367 deletions(-)
>> delete mode 100644 libavfilter/af_asyncts.c
>>
>> diff --git a/Changelog b/Changelog
>> index 13628ca28b..88e188bacb 100644
>> --- a/Changelog
>> +++ b/Changelog
>> @@ -2,6 +2,7 @@ Entries are sorted chronologically from oldest to
>> youngest within each release,
>> releases are sorted from youngest to oldest.
>>
>> version <next>:
>> +- Removed asyncts filter (use af_aresample instead)
>>
>
> Entires are sorted from oldest to youngest :P
>
> Thanks for the cleanup.
>
>
>
Changed locally.
I'll push this tomorrow if there are no objections.
Rostislav Pehlivanov March 27, 2017, 5:35 p.m. UTC | #3
On 16 March 2017 at 07:02, Rostislav Pehlivanov <atomnuker@gmail.com> wrote:

>
>
> On 6 March 2017 at 20:47, Marton Balint <cus@passwd.hu> wrote:
>
>>
>> On Mon, 6 Mar 2017, Rostislav Pehlivanov wrote:
>>
>> Long overdue for removal, af_aresample should be used instead.
>>>
>>> Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>
>>> ---
>>> Changelog                   |   1 +
>>> configure                   |   2 -
>>> doc/filters.texi            |  33 -----
>>> libavfilter/Makefile        |   1 -
>>> libavfilter/af_asyncts.c    | 323 ------------------------------
>>> --------------
>>> libavfilter/allfilters.c    |   1 -
>>> libavfilter/version.h       |   2 +-
>>> tests/fate/filter-audio.mak |   6 -
>>> 8 files changed, 2 insertions(+), 367 deletions(-)
>>> delete mode 100644 libavfilter/af_asyncts.c
>>>
>>> diff --git a/Changelog b/Changelog
>>> index 13628ca28b..88e188bacb 100644
>>> --- a/Changelog
>>> +++ b/Changelog
>>> @@ -2,6 +2,7 @@ Entries are sorted chronologically from oldest to
>>> youngest within each release,
>>> releases are sorted from youngest to oldest.
>>>
>>> version <next>:
>>> +- Removed asyncts filter (use af_aresample instead)
>>>
>>
>> Entires are sorted from oldest to youngest :P
>>
>> Thanks for the cleanup.
>>
>>
>>
> Changed locally.
> I'll push this tomorrow if there are no objections.
>
>
Pushed, thanks.
diff mbox

Patch

diff --git a/Changelog b/Changelog
index 13628ca28b..88e188bacb 100644
--- a/Changelog
+++ b/Changelog
@@ -2,6 +2,7 @@  Entries are sorted chronologically from oldest to youngest within each release,
 releases are sorted from youngest to oldest.
 
 version <next>:
+- Removed asyncts filter (use af_aresample instead)
 - CrystalHD decoder moved to new decode API
 - add internal ebur128 library, remove external libebur128 dependency
 - Pro-MPEG CoP #3-R2 FEC protocol
diff --git a/configure b/configure
index 0199fec5c0..a307ed81b6 100755
--- a/configure
+++ b/configure
@@ -3074,7 +3074,6 @@  afftfilt_filter_select="fft"
 amovie_filter_deps="avcodec avformat"
 aresample_filter_deps="swresample"
 ass_filter_deps="libass"
-asyncts_filter_deps="avresample"
 atempo_filter_deps="avcodec"
 atempo_filter_select="rdft"
 azmq_filter_deps="libzmq"
@@ -6460,7 +6459,6 @@  enabled zlib && add_cppflags -DZLIB_CONST
 enabled afftfilt_filter     && prepend avfilter_deps "avcodec"
 enabled amovie_filter       && prepend avfilter_deps "avformat avcodec"
 enabled aresample_filter    && prepend avfilter_deps "swresample"
-enabled asyncts_filter      && prepend avfilter_deps "avresample"
 enabled atempo_filter       && prepend avfilter_deps "avcodec"
 enabled cover_rect_filter   && prepend avfilter_deps "avformat avcodec"
 enabled ebur128_filter && enabled swresample && prepend avfilter_deps "swresample"
diff --git a/doc/filters.texi b/doc/filters.texi
index b5265d9297..da20a7e7e3 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -1642,39 +1642,6 @@  Number of occasions (not the number of samples) that the signal attained either
 Overall bit depth of audio. Number of bits used for each sample.
 @end table
 
-@section asyncts
-
-Synchronize audio data with timestamps by squeezing/stretching it and/or
-dropping samples/adding silence when needed.
-
-This filter is not built by default, please use @ref{aresample} to do squeezing/stretching.
-
-It accepts the following parameters:
-@table @option
-
-@item compensate
-Enable stretching/squeezing the data to make it match the timestamps. Disabled
-by default. When disabled, time gaps are covered with silence.
-
-@item min_delta
-The minimum difference between timestamps and audio data (in seconds) to trigger
-adding/dropping samples. The default value is 0.1. If you get an imperfect
-sync with this filter, try setting this parameter to 0.
-
-@item max_comp
-The maximum compensation in samples per second. Only relevant with compensate=1.
-The default value is 500.
-
-@item first_pts
-Assume that the first PTS should be this value. The time base is 1 / sample
-rate. This allows for padding/trimming at the start of the stream. By default,
-no assumption is made about the first frame's expected PTS, so no padding or
-trimming is done. For example, this could be set to 0 to pad the beginning with
-silence if an audio stream starts after the video stream or to trim any samples
-with a negative PTS due to encoder delay.
-
-@end table
-
 @section atempo
 
 Adjust audio tempo.
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 6b9fba2d4c..d3641370de 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -67,7 +67,6 @@  OBJS-$(CONFIG_ASIDEDATA_FILTER)              += f_sidedata.o
 OBJS-$(CONFIG_ASPLIT_FILTER)                 += split.o
 OBJS-$(CONFIG_ASTATS_FILTER)                 += af_astats.o
 OBJS-$(CONFIG_ASTREAMSELECT_FILTER)          += f_streamselect.o
-OBJS-$(CONFIG_ASYNCTS_FILTER)                += af_asyncts.o
 OBJS-$(CONFIG_ATEMPO_FILTER)                 += af_atempo.o
 OBJS-$(CONFIG_ATRIM_FILTER)                  += trim.o
 OBJS-$(CONFIG_AZMQ_FILTER)                   += f_zmq.o
diff --git a/libavfilter/af_asyncts.c b/libavfilter/af_asyncts.c
deleted file mode 100644
index a33e0dd67e..0000000000
--- a/libavfilter/af_asyncts.c
+++ /dev/null
@@ -1,323 +0,0 @@ 
-/*
- * This file is part of FFmpeg.
- *
- * FFmpeg 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.
- *
- * FFmpeg 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 FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <stdint.h>
-
-#include "libavresample/avresample.h"
-#include "libavutil/attributes.h"
-#include "libavutil/audio_fifo.h"
-#include "libavutil/common.h"
-#include "libavutil/mathematics.h"
-#include "libavutil/opt.h"
-#include "libavutil/samplefmt.h"
-
-#include "audio.h"
-#include "avfilter.h"
-#include "internal.h"
-
-typedef struct ASyncContext {
-    const AVClass *class;
-
-    AVAudioResampleContext *avr;
-    int64_t pts;            ///< timestamp in samples of the first sample in fifo
-    int min_delta;          ///< pad/trim min threshold in samples
-    int first_frame;        ///< 1 until filter_frame() has processed at least 1 frame with a pts != AV_NOPTS_VALUE
-    int64_t first_pts;      ///< user-specified first expected pts, in samples
-    int comp;               ///< current resample compensation
-
-    /* options */
-    int resample;
-    float min_delta_sec;
-    int max_comp;
-
-    /* set by filter_frame() to signal an output frame to request_frame() */
-    int got_output;
-} ASyncContext;
-
-#define OFFSET(x) offsetof(ASyncContext, x)
-#define A AV_OPT_FLAG_AUDIO_PARAM
-#define F AV_OPT_FLAG_FILTERING_PARAM
-static const AVOption asyncts_options[] = {
-    { "compensate", "Stretch/squeeze the data to make it match the timestamps", OFFSET(resample),      AV_OPT_TYPE_BOOL,  { .i64 = 0 },   0, 1,       A|F },
-    { "min_delta",  "Minimum difference between timestamps and audio data "
-                    "(in seconds) to trigger padding/trimmin the data.",        OFFSET(min_delta_sec), AV_OPT_TYPE_FLOAT, { .dbl = 0.1 }, 0, INT_MAX, A|F },
-    { "max_comp",   "Maximum compensation in samples per second.",              OFFSET(max_comp),      AV_OPT_TYPE_INT,   { .i64 = 500 }, 0, INT_MAX, A|F },
-    { "first_pts",  "Assume the first pts should be this value.",               OFFSET(first_pts),     AV_OPT_TYPE_INT64, { .i64 = AV_NOPTS_VALUE }, INT64_MIN, INT64_MAX, A|F },
-    { NULL }
-};
-
-AVFILTER_DEFINE_CLASS(asyncts);
-
-static av_cold int init(AVFilterContext *ctx)
-{
-    ASyncContext *s = ctx->priv;
-
-    s->pts         = AV_NOPTS_VALUE;
-    s->first_frame = 1;
-
-    return 0;
-}
-
-static av_cold void uninit(AVFilterContext *ctx)
-{
-    ASyncContext *s = ctx->priv;
-
-    if (s->avr) {
-        avresample_close(s->avr);
-        avresample_free(&s->avr);
-    }
-}
-
-static int config_props(AVFilterLink *link)
-{
-    ASyncContext *s = link->src->priv;
-    int ret;
-
-    s->min_delta = s->min_delta_sec * link->sample_rate;
-    link->time_base = (AVRational){1, link->sample_rate};
-
-    s->avr = avresample_alloc_context();
-    if (!s->avr)
-        return AVERROR(ENOMEM);
-
-    av_opt_set_int(s->avr,  "in_channel_layout", link->channel_layout, 0);
-    av_opt_set_int(s->avr, "out_channel_layout", link->channel_layout, 0);
-    av_opt_set_int(s->avr,  "in_sample_fmt",     link->format,         0);
-    av_opt_set_int(s->avr, "out_sample_fmt",     link->format,         0);
-    av_opt_set_int(s->avr,  "in_sample_rate",    link->sample_rate,    0);
-    av_opt_set_int(s->avr, "out_sample_rate",    link->sample_rate,    0);
-
-    if (s->resample)
-        av_opt_set_int(s->avr, "force_resampling", 1, 0);
-
-    if ((ret = avresample_open(s->avr)) < 0)
-        return ret;
-
-    return 0;
-}
-
-/* get amount of data currently buffered, in samples */
-static int64_t get_delay(ASyncContext *s)
-{
-    return avresample_available(s->avr) + avresample_get_delay(s->avr);
-}
-
-static void handle_trimming(AVFilterContext *ctx)
-{
-    ASyncContext *s = ctx->priv;
-
-    if (s->pts < s->first_pts) {
-        int delta = FFMIN(s->first_pts - s->pts, avresample_available(s->avr));
-        av_log(ctx, AV_LOG_VERBOSE, "Trimming %d samples from start\n",
-               delta);
-        avresample_read(s->avr, NULL, delta);
-        s->pts += delta;
-    } else if (s->first_frame)
-        s->pts = s->first_pts;
-}
-
-static int request_frame(AVFilterLink *link)
-{
-    AVFilterContext *ctx = link->src;
-    ASyncContext      *s = ctx->priv;
-    int ret = 0;
-    int nb_samples;
-
-    s->got_output = 0;
-    ret = ff_request_frame(ctx->inputs[0]);
-
-    /* flush the fifo */
-    if (ret == AVERROR_EOF) {
-        if (s->first_pts != AV_NOPTS_VALUE)
-            handle_trimming(ctx);
-
-        if (nb_samples = get_delay(s)) {
-            AVFrame *buf = ff_get_audio_buffer(link, nb_samples);
-            if (!buf)
-                return AVERROR(ENOMEM);
-            ret = avresample_convert(s->avr, buf->extended_data,
-                                     buf->linesize[0], nb_samples, NULL, 0, 0);
-            if (ret <= 0) {
-                av_frame_free(&buf);
-                return (ret < 0) ? ret : AVERROR_EOF;
-            }
-
-            buf->pts = s->pts;
-            return ff_filter_frame(link, buf);
-        }
-    }
-
-    return ret;
-}
-
-static int write_to_fifo(ASyncContext *s, AVFrame *buf)
-{
-    int ret = avresample_convert(s->avr, NULL, 0, 0, buf->extended_data,
-                                 buf->linesize[0], buf->nb_samples);
-    av_frame_free(&buf);
-    return ret;
-}
-
-static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
-{
-    AVFilterContext  *ctx = inlink->dst;
-    ASyncContext       *s = ctx->priv;
-    AVFilterLink *outlink = ctx->outputs[0];
-    int nb_channels = av_get_channel_layout_nb_channels(buf->channel_layout);
-    int64_t pts = (buf->pts == AV_NOPTS_VALUE) ? buf->pts :
-                  av_rescale_q(buf->pts, inlink->time_base, outlink->time_base);
-    int out_size, ret;
-    int64_t delta;
-    int64_t new_pts;
-
-    /* buffer data until we get the next timestamp */
-    if (s->pts == AV_NOPTS_VALUE || pts == AV_NOPTS_VALUE) {
-        if (pts != AV_NOPTS_VALUE) {
-            s->pts = pts - get_delay(s);
-        }
-        return write_to_fifo(s, buf);
-    }
-
-    if (s->first_pts != AV_NOPTS_VALUE) {
-        handle_trimming(ctx);
-        if (!avresample_available(s->avr))
-            return write_to_fifo(s, buf);
-    }
-
-    /* when we have two timestamps, compute how many samples would we have
-     * to add/remove to get proper sync between data and timestamps */
-    delta    = pts - s->pts - get_delay(s);
-    out_size = avresample_available(s->avr);
-
-    if (llabs(delta) > s->min_delta ||
-        (s->first_frame && delta && s->first_pts != AV_NOPTS_VALUE)) {
-        av_log(ctx, AV_LOG_VERBOSE, "Discontinuity - %"PRId64" samples.\n", delta);
-        out_size = av_clipl_int32((int64_t)out_size + delta);
-    } else {
-        if (s->resample) {
-            // adjust the compensation if delta is non-zero
-            int delay = get_delay(s);
-            int comp = s->comp + av_clip(delta * inlink->sample_rate / delay,
-                                         -s->max_comp, s->max_comp);
-            if (comp != s->comp) {
-                av_log(ctx, AV_LOG_VERBOSE, "Compensating %d samples per second.\n", comp);
-                if (avresample_set_compensation(s->avr, comp, inlink->sample_rate) == 0) {
-                    s->comp = comp;
-                }
-            }
-        }
-        // adjust PTS to avoid monotonicity errors with input PTS jitter
-        pts -= delta;
-        delta = 0;
-    }
-
-    if (out_size > 0) {
-        AVFrame *buf_out = ff_get_audio_buffer(outlink, out_size);
-        if (!buf_out) {
-            ret = AVERROR(ENOMEM);
-            goto fail;
-        }
-
-        if (s->first_frame && delta > 0) {
-            int planar = av_sample_fmt_is_planar(buf_out->format);
-            int planes = planar ?  nb_channels : 1;
-            int block_size = av_get_bytes_per_sample(buf_out->format) *
-                             (planar ? 1 : nb_channels);
-
-            int ch;
-
-            av_samples_set_silence(buf_out->extended_data, 0, delta,
-                                   nb_channels, buf->format);
-
-            for (ch = 0; ch < planes; ch++)
-                buf_out->extended_data[ch] += delta * block_size;
-
-            avresample_read(s->avr, buf_out->extended_data, out_size);
-
-            for (ch = 0; ch < planes; ch++)
-                buf_out->extended_data[ch] -= delta * block_size;
-        } else {
-            avresample_read(s->avr, buf_out->extended_data, out_size);
-
-            if (delta > 0) {
-                av_samples_set_silence(buf_out->extended_data, out_size - delta,
-                                       delta, nb_channels, buf->format);
-            }
-        }
-        buf_out->pts = s->pts;
-        ret = ff_filter_frame(outlink, buf_out);
-        if (ret < 0)
-            goto fail;
-        s->got_output = 1;
-    } else if (avresample_available(s->avr)) {
-        av_log(ctx, AV_LOG_WARNING, "Non-monotonous timestamps, dropping "
-               "whole buffer.\n");
-    }
-
-    /* drain any remaining buffered data */
-    avresample_read(s->avr, NULL, avresample_available(s->avr));
-
-    new_pts = pts - avresample_get_delay(s->avr);
-    /* check for s->pts monotonicity */
-    if (new_pts > s->pts) {
-        s->pts = new_pts;
-        ret = avresample_convert(s->avr, NULL, 0, 0, buf->extended_data,
-                                 buf->linesize[0], buf->nb_samples);
-    } else {
-        av_log(ctx, AV_LOG_WARNING, "Non-monotonous timestamps, dropping "
-               "whole buffer.\n");
-        ret = 0;
-    }
-
-    s->first_frame = 0;
-fail:
-    av_frame_free(&buf);
-
-    return ret;
-}
-
-static const AVFilterPad avfilter_af_asyncts_inputs[] = {
-    {
-        .name          = "default",
-        .type          = AVMEDIA_TYPE_AUDIO,
-        .filter_frame  = filter_frame
-    },
-    { NULL }
-};
-
-static const AVFilterPad avfilter_af_asyncts_outputs[] = {
-    {
-        .name          = "default",
-        .type          = AVMEDIA_TYPE_AUDIO,
-        .config_props  = config_props,
-        .request_frame = request_frame
-    },
-    { NULL }
-};
-
-AVFilter ff_af_asyncts = {
-    .name        = "asyncts",
-    .description = NULL_IF_CONFIG_SMALL("Sync audio data to timestamps."),
-    .init        = init,
-    .uninit      = uninit,
-    .priv_size   = sizeof(ASyncContext),
-    .priv_class  = &asyncts_class,
-    .query_formats = ff_query_formats_all_layouts,
-    .inputs      = avfilter_af_asyncts_inputs,
-    .outputs     = avfilter_af_asyncts_outputs,
-};
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 15a74c4eed..21830fb420 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -84,7 +84,6 @@  void avfilter_register_all(void)
     REGISTER_FILTER(ASPLIT,         asplit,         af);
     REGISTER_FILTER(ASTATS,         astats,         af);
     REGISTER_FILTER(ASTREAMSELECT,  astreamselect,  af);
-    REGISTER_FILTER(ASYNCTS,        asyncts,        af);
     REGISTER_FILTER(ATEMPO,         atempo,         af);
     REGISTER_FILTER(ATRIM,          atrim,          af);
     REGISTER_FILTER(AZMQ,           azmq,           af);
diff --git a/libavfilter/version.h b/libavfilter/version.h
index 3cd6e24b27..4be7abb653 100644
--- a/libavfilter/version.h
+++ b/libavfilter/version.h
@@ -31,7 +31,7 @@ 
 
 #define LIBAVFILTER_VERSION_MAJOR   6
 #define LIBAVFILTER_VERSION_MINOR  75
-#define LIBAVFILTER_VERSION_MICRO 100
+#define LIBAVFILTER_VERSION_MICRO 101
 
 #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
                                                LIBAVFILTER_VERSION_MINOR, \
diff --git a/tests/fate/filter-audio.mak b/tests/fate/filter-audio.mak
index 6de3c46b0e..2b8ac98562 100644
--- a/tests/fate/filter-audio.mak
+++ b/tests/fate/filter-audio.mak
@@ -187,12 +187,6 @@  $(FATE_AMIX): SRC1 = $(TARGET_PATH)/tests/data/asynth-44100-2-2.wav
 $(FATE_AMIX): CMP  = oneoff
 $(FATE_AMIX): CMP_UNIT = f32
 
-FATE_AFILTER_SAMPLES-$(call FILTERDEMDECMUX, ASYNCTS, FLV, NELLYMOSER, PCM_S16LE) += fate-filter-asyncts
-fate-filter-asyncts: SRC = $(TARGET_SAMPLES)/nellymoser/nellymoser-discont.flv
-fate-filter-asyncts: CMD = pcm -analyzeduration 10000000 -i $(SRC) -af asyncts
-fate-filter-asyncts: CMP = oneoff
-fate-filter-asyncts: REF = $(SAMPLES)/nellymoser/nellymoser-discont-async-v3.pcm
-
 FATE_AFILTER_SAMPLES-$(CONFIG_ARESAMPLE_FILTER) += fate-filter-aresample
 fate-filter-aresample: SRC = $(TARGET_SAMPLES)/nellymoser/nellymoser-discont.flv
 fate-filter-aresample: CMD = pcm -analyzeduration 10000000 -i $(SRC) -af aresample=min_comp=0.001:min_hard_comp=0.1:first_pts=0