On 5/8/19, Pavel Koshevoy <pkoshe...@gmail.com> wrote: > NOTE: this is a refinement of the patch from Paul B Mahol > offset all output timestamps by same amount of first input timestamp > --- > libavfilter/af_atempo.c | 11 ++++++++++- > 1 file changed, 10 insertions(+), 1 deletion(-) > > diff --git a/libavfilter/af_atempo.c b/libavfilter/af_atempo.c > index bfdad7d76b..688dac5464 100644 > --- a/libavfilter/af_atempo.c > +++ b/libavfilter/af_atempo.c > @@ -103,6 +103,9 @@ typedef struct ATempoContext { > // 1: output sample position > int64_t position[2]; > > + // first input timestamp, all other timestamps are offset by this one > + int64_t start_pts; > + > // sample format: > enum AVSampleFormat format; > > @@ -186,6 +189,7 @@ static void yae_clear(ATempoContext *atempo) > > atempo->nfrag = 0; > atempo->state = YAE_LOAD_FRAGMENT; > + atempo->start_pts = AV_NOPTS_VALUE; > > atempo->position[0] = 0; > atempo->position[1] = 0; > @@ -1068,7 +1072,7 @@ static int push_samples(ATempoContext *atempo, > atempo->dst_buffer->nb_samples = n_out; > > // adjust the PTS: > - atempo->dst_buffer->pts = > + atempo->dst_buffer->pts = atempo->start_pts + > av_rescale_q(atempo->nsamples_out, > (AVRational){ 1, outlink->sample_rate }, > outlink->time_base); > @@ -1097,6 +1101,11 @@ static int filter_frame(AVFilterLink *inlink, AVFrame > *src_buffer) > const uint8_t *src = src_buffer->data[0]; > const uint8_t *src_end = src + n_in * atempo->stride; > > + if (atempo->start_pts == AV_NOPTS_VALUE) > + atempo->start_pts = av_rescale_q(src_buffer->pts, > + inlink->time_base, > + outlink->time_base); > + > while (src < src_end) { > if (!atempo->dst_buffer) { > atempo->dst_buffer = ff_get_audio_buffer(outlink, n_out); > -- > 2.16.4 > > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
Should be fine. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".