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avcodec/setts_bsf: add an option to set output time base 

And a relevant constant to use it in expressions.

Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2022-02-28 12:35:27 -03:00
parent 9c8a06a7d6
commit 4e33bae9f9
3 changed files with 14 additions and 2 deletions
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3
doc/bitstream_filters.texi
View File

@ -800,6 +800,9 @@ The next input duration.
@item TB
The timebase of stream packet belongs.
@item TB_OUT
The output timebase.
@item SR
The sample rate of stream packet belongs.

11
libavcodec/setts_bsf.c
View File

@ -47,7 +47,8 @@ static const char *const var_names[] = {
"DURATION", ///< original duration in the file of the frame
"STARTPTS", ///< PTS at start of movie
"STARTDTS", ///< DTS at start of movie
"TB", ///< timebase of the stream
"TB", ///< input timebase of the stream
"TB_OUT", ///< output timebase of the stream
"SR", ///< sample rate of the stream
"NOPTS", ///< The AV_NOPTS_VALUE constant
NULL
@ -72,6 +73,7 @@ enum var_name {
VAR_STARTPTS,
VAR_STARTDTS,
VAR_TB,
VAR_TB_OUT,
VAR_SR,
VAR_NOPTS,
VAR_VARS_NB
@ -85,6 +87,8 @@ typedef struct SetTSContext {
char *dts_str;
char *duration_str;
AVRational time_base;
int64_t frame_number;
int64_t start_pts;
@ -141,11 +145,15 @@ static int setts_init(AVBSFContext *ctx)
}
}
if (s->time_base.den)
ctx->time_base_out = s->time_base;
s->frame_number= 0;
s->start_pts = AV_NOPTS_VALUE;
s->start_dts = AV_NOPTS_VALUE;
s->var_values[VAR_NOPTS] = AV_NOPTS_VALUE;
s->var_values[VAR_TB] = ctx->time_base_in.den ? av_q2d(ctx->time_base_in) : 0;
s->var_values[VAR_TB_OUT]= ctx->time_base_out.den ? av_q2d(ctx->time_base_out) : 0;
s->var_values[VAR_SR] = ctx->par_in->sample_rate;
return 0;
@ -251,6 +259,7 @@ static const AVOption options[] = {
{ "pts", "set expression for packet PTS", OFFSET(pts_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
{ "dts", "set expression for packet DTS", OFFSET(dts_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
{ "duration", "set expression for packet duration", OFFSET(duration_str), AV_OPT_TYPE_STRING, {.str="DURATION"}, 0, 0, FLAGS },
{ "time_base", "set output timebase", OFFSET(time_base), AV_OPT_TYPE_RATIONAL, {.dbl=0}, 0, 0, FLAGS },
{ NULL },
};

2
libavcodec/version.h
View File

@ -29,7 +29,7 @@
#define LIBAVCODEC_VERSION_MAJOR 59
#define LIBAVCODEC_VERSION_MINOR 21
#define LIBAVCODEC_VERSION_MICRO 102
#define LIBAVCODEC_VERSION_MICRO 103
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \