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avfilter/af_silenceremove: add timestamp option

This commit is contained in:
Paul B Mahol 2023-05-28 12:01:27 +02:00
parent b95d123097
commit 62d4110a64
2 changed files with 27 additions and 2 deletions
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10
doc/filters.texi
View File

@ -6485,6 +6485,16 @@ In that case it may be needed to also set @option{start_silence} and/or
@option{stop_silence} to nonzero values with also @option{start_duration} and/or
@option{stop_duration} to nonzero values.
Default value is @code{0.02}. Allowed range is from @code{0} to @code{10}.
@item timestamp
Set processing mode of every audio frame output timestamp.
@table @option
@item write
Full timestamps rewrite, keep only the start time for the first output frame.
@item copy
Non-dropped frames are left with same timestamp as input audio frame.
@end table
Defaults value is @code{write}.
@end table
@subsection Examples

19
libavfilter/af_silenceremove.c
View File

@ -41,6 +41,12 @@ enum SilenceDetect {
D_NB
};
enum TimestampMode {
TS_WRITE,
TS_COPY,
TS_NB
};
enum ThresholdMode {
T_ANY,
T_ALL,
@ -67,6 +73,8 @@ typedef struct SilenceRemoveContext {
int64_t window_duration_opt;
int timestamp_mode;
int start_found_periods;
int stop_found_periods;
@ -138,6 +146,9 @@ static const AVOption silenceremove_options[] = {
{ "median", "use median of absolute values of samples", 0, AV_OPT_TYPE_CONST, {.i64=D_MEDIAN},0, 0, AF, "detection" },
{ "ptp", "use absolute of max peak to min peak difference", 0, AV_OPT_TYPE_CONST, {.i64=D_PTP}, 0, 0, AF, "detection" },
{ "window", "set duration of window for silence detection", OFFSET(window_duration_opt), AV_OPT_TYPE_DURATION, {.i64=20000}, 0, 100000000, AF },
{ "timestamp", "set how every output frame timestamp is processed", OFFSET(timestamp_mode), AV_OPT_TYPE_INT, {.i64=TS_WRITE}, 0, TS_NB-1, AF, "timestamp" },
{ "write", "full timestamps rewrite, keep only the start time", 0, AV_OPT_TYPE_CONST, {.i64=TS_WRITE}, 0, 0, AF, "timestamp" },
{ "copy", "non-dropped frames are left with same timestamp", 0, AV_OPT_TYPE_CONST, {.i64=TS_COPY}, 0, 0, AF, "timestamp" },
{ NULL }
};
@ -293,7 +304,10 @@ static int filter_frame(AVFilterLink *outlink, AVFrame *in)
return AVERROR(ENOMEM);
}
out->pts = s->next_pts;
if (s->timestamp_mode == TS_WRITE)
out->pts = s->next_pts;
else
out->pts = in->pts;
switch (outlink->format) {
case AV_SAMPLE_FMT_FLT:
@ -395,7 +409,8 @@ static int activate(AVFilterContext *ctx)
if (ret > 0) {
if (s->start_periods == 1 && s->stop_periods == 0 &&
s->start_found_periods < 0) {
in->pts = s->next_pts;
if (s->timestamp_mode == TS_WRITE)
in->pts = s->next_pts;
s->next_pts += in->nb_samples;
return ff_filter_frame(outlink, in);
}