From 181031906e4984c1c539dc84d21386a4397e257e Mon Sep 17 00:00:00 2001 From: Pavel Koshevoy Date: Tue, 7 May 2019 22:39:45 -0600 Subject: [PATCH] avfilter/af_atempo: Make ffplay display correct timestamps when seeking 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);