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avconv: allow -b to be used with streamcopy

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In this mode it tells the muxer about the bitrate of the input stream.
This commit is contained in:
Anton Khirnov 2017-01-30 21:35:42 +01:00
parent ab2539bd37
commit b420a27e74
4 changed files with 26 additions and 0 deletions
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3
avconv.c
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@ -1852,6 +1852,9 @@ static int init_output_stream_streamcopy(OutputStream *ost)
ost->st->time_base = ist->st->time_base;
if (ost->bitrate_override)
par_dst->bit_rate = ost->bitrate_override;
if (ist->st->nb_side_data) {
ost->st->side_data = av_realloc_array(NULL, ist->st->nb_side_data,
sizeof(*ist->st->side_data));

5
avconv.h
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@ -162,6 +162,8 @@ typedef struct OptionsContext {
int nb_sample_fmts;
SpecifierOpt *qscale;
int nb_qscale;
SpecifierOpt *bitrates;
int nb_bitrates;
SpecifierOpt *forced_key_frames;
int nb_forced_key_frames;
SpecifierOpt *force_fps;
@ -382,6 +384,9 @@ typedef struct OutputStream {
int forced_kf_index;
char *forced_keyframes;
// the bitrate to send to the muxer for streamcopy
int bitrate_override;
char *logfile_prefix;
FILE *logfile;

11
avconv_opt.c
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@ -952,6 +952,7 @@ static OutputStream *new_output_stream(OptionsContext *o, AVFormatContext *oc, e
const char *bsfs = NULL;
char *next, *codec_tag = NULL;
double qscale = -1;
int bitrate = 0;
if (!st) {
av_log(NULL, AV_LOG_FATAL, "Could not alloc stream.\n");
@ -1091,6 +1092,14 @@ static OutputStream *new_output_stream(OptionsContext *o, AVFormatContext *oc, e
ost->enc_ctx->global_quality = FF_QP2LAMBDA * qscale;
}
MATCH_PER_STREAM_OPT(bitrates, i, bitrate, oc, st);
if (bitrate > 0) {
if (ost->stream_copy)
ost->bitrate_override = bitrate;
else
ost->enc_ctx->bit_rate = bitrate;
}
ost->max_muxing_queue_size = 128;
MATCH_PER_STREAM_OPT(max_muxing_queue_size, i, ost->max_muxing_queue_size, oc, st);
ost->max_muxing_queue_size *= sizeof(AVPacket);
@ -2570,6 +2579,8 @@ const OptionDef options[] = {
{ "qscale", HAS_ARG | OPT_EXPERT | OPT_DOUBLE |
OPT_SPEC | OPT_OUTPUT, { .off = OFFSET(qscale) },
"use fixed quality scale (VBR)", "q" },
{ "b", HAS_ARG | OPT_INT | OPT_SPEC | OPT_OUTPUT, { .off = OFFSET(bitrates) },
"set stream bitrate in bits/second", "bitrate" },
{ "filter", HAS_ARG | OPT_STRING | OPT_SPEC | OPT_OUTPUT, { .off = OFFSET(filters) },
"set stream filterchain", "filter_list" },
{ "filter_script", HAS_ARG | OPT_STRING | OPT_SPEC | OPT_OUTPUT, { .off = OFFSET(filter_scripts) },

7
doc/avconv.texi
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@ -354,6 +354,13 @@ Stop writing to the stream after @var{framecount} frames.
Use fixed quality scale (VBR). The meaning of @var{q} is
codec-dependent.
@item -b[:@var{stream_specifier}] @var{bitrate} (@emph{output,per-stream})
Set the stream bitrate in bits per second. When transcoding, this tells the
encoder to use the specified bitrate for the encoded stream.
For streamcopy, this provides a hint to the muxer about the bitrate of the input
stream.
@item -filter[:@var{stream_specifier}] @var{filter_graph} (@emph{output,per-stream})
@var{filter_graph} is a description of the filter graph to apply to
the stream. Use @code{-filters} to show all the available filters