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ffmpeg: make -bits_per_raw_sample a per-output-stream option

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Also, document it and make it apply to audio in addition to video.
This commit is contained in:
Anton Khirnov 2021-11-23 10:18:01 +01:00
parent b9c928a486
commit 4258893961
4 changed files with 24 additions and 8 deletions
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7
doc/ffmpeg.texi
View File

@ -1960,6 +1960,13 @@ filter (scale, aresample) in the graph.
On by default, to explicitly disable it you need to specify
@code{-noauto_conversion_filters}.
@item -bits_per_raw_sample[:@var{stream_specifier}] @var{value} (@emph{output,per-stream})
Declare the number of bits per raw sample in the given output stream to be
@var{value}. Note that this option sets the information provided to the
encoder/muxer, it does not change the stream to conform to this value. Setting
values that do not match the stream properties may result in encoding failures
or invalid output files.
@end table
@section Preset files

11
fftools/ffmpeg.c
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@ -3329,13 +3329,16 @@ static int init_output_stream_encode(OutputStream *ost, AVFrame *frame)
switch (enc_ctx->codec_type) {
case AVMEDIA_TYPE_AUDIO:
enc_ctx->sample_fmt = av_buffersink_get_format(ost->filter->filter);
if (dec_ctx)
enc_ctx->bits_per_raw_sample = FFMIN(dec_ctx->bits_per_raw_sample,
av_get_bytes_per_sample(enc_ctx->sample_fmt) << 3);
enc_ctx->sample_rate = av_buffersink_get_sample_rate(ost->filter->filter);
enc_ctx->channel_layout = av_buffersink_get_channel_layout(ost->filter->filter);
enc_ctx->channels = av_buffersink_get_channels(ost->filter->filter);
if (ost->bits_per_raw_sample)
enc_ctx->bits_per_raw_sample = ost->bits_per_raw_sample;
else if (dec_ctx)
enc_ctx->bits_per_raw_sample = FFMIN(dec_ctx->bits_per_raw_sample,
av_get_bytes_per_sample(enc_ctx->sample_fmt) << 3);
init_encoder_time_base(ost, av_make_q(1, enc_ctx->sample_rate));
break;
@ -3378,7 +3381,7 @@ static int init_output_stream_encode(OutputStream *ost, AVFrame *frame)
enc_ctx->width != dec_ctx->width ||
enc_ctx->height != dec_ctx->height ||
enc_ctx->pix_fmt != dec_ctx->pix_fmt) {
enc_ctx->bits_per_raw_sample = frame_bits_per_raw_sample;
enc_ctx->bits_per_raw_sample = ost->bits_per_raw_sample;
}
// Field order: autodetection

3
fftools/ffmpeg.h
View File

@ -228,6 +228,8 @@ typedef struct OptionsContext {
int nb_enc_time_bases;
SpecifierOpt *autoscale;
int nb_autoscale;
SpecifierOpt *bits_per_raw_sample;
int nb_bits_per_raw_sample;
} OptionsContext;
typedef struct InputFilter {
@ -483,6 +485,7 @@ typedef struct OutputStream {
int top_field_first;
int rotate_overridden;
int autoscale;
int bits_per_raw_sample;
double rotate_override_value;
AVRational frame_aspect_ratio;

11
fftools/ffmpeg_opt.c
View File

@ -96,6 +96,7 @@ static const char *const opt_name_discard[] = {"discard", NULL
static const char *const opt_name_disposition[] = {"disposition", NULL};
static const char *const opt_name_time_bases[] = {"time_base", NULL};
static const char *const opt_name_enc_time_bases[] = {"enc_time_base", NULL};
static const char *const opt_name_bits_per_raw_sample[] = {"bits_per_raw_sample", NULL};
#define WARN_MULTIPLE_OPT_USAGE(name, type, so, st)\
{\
@ -160,7 +161,6 @@ int abort_on_flags = 0;
int print_stats = -1;
int qp_hist = 0;
int stdin_interaction = 1;
int frame_bits_per_raw_sample = 0;
float max_error_rate = 2.0/3;
char *filter_nbthreads;
int filter_complex_nbthreads = 0;
@ -1604,6 +1604,9 @@ static OutputStream *new_output_stream(OptionsContext *o, AVFormatContext *oc, e
ost->muxing_queue_data_threshold = 50*1024*1024;
MATCH_PER_STREAM_OPT(muxing_queue_data_threshold, i, ost->muxing_queue_data_threshold, oc, st);
MATCH_PER_STREAM_OPT(bits_per_raw_sample, i, ost->bits_per_raw_sample,
oc, st);
if (oc->oformat->flags & AVFMT_GLOBALHEADER)
ost->enc_ctx->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
@ -1769,7 +1772,6 @@ static OutputStream *new_video_stream(OptionsContext *o, AVFormatContext *oc, in
exit_program(1);
}
video_enc->bits_per_raw_sample = frame_bits_per_raw_sample;
MATCH_PER_STREAM_OPT(frame_pix_fmts, str, frame_pix_fmt, oc, st);
if (frame_pix_fmt && *frame_pix_fmt == '+') {
ost->keep_pix_fmt = 1;
@ -3681,6 +3683,9 @@ const OptionDef options[] = {
"set the maximum number of queued packets from the demuxer" },
{ "find_stream_info", OPT_BOOL | OPT_PERFILE | OPT_INPUT | OPT_EXPERT, { &find_stream_info },
"read and decode the streams to fill missing information with heuristics" },
{ "bits_per_raw_sample", OPT_INT | HAS_ARG | OPT_EXPERT | OPT_SPEC | OPT_OUTPUT,
{ .off = OFFSET(bits_per_raw_sample) },
"set the number of bits per raw sample", "number" },
/* video options */
{ "vframes", OPT_VIDEO | HAS_ARG | OPT_PERFILE | OPT_OUTPUT, { .func_arg = opt_video_frames },
@ -3700,8 +3705,6 @@ const OptionDef options[] = {
{ "pix_fmt", OPT_VIDEO | HAS_ARG | OPT_EXPERT | OPT_STRING | OPT_SPEC |
OPT_INPUT | OPT_OUTPUT, { .off = OFFSET(frame_pix_fmts) },
"set pixel format", "format" },
{ "bits_per_raw_sample", OPT_VIDEO | OPT_INT | HAS_ARG, { &frame_bits_per_raw_sample },
"set the number of bits per raw sample", "number" },
{ "vn", OPT_VIDEO | OPT_BOOL | OPT_OFFSET | OPT_INPUT | OPT_OUTPUT,{ .off = OFFSET(video_disable) },
"disable video" },
{ "rc_override", OPT_VIDEO | HAS_ARG | OPT_EXPERT | OPT_STRING | OPT_SPEC |