diff options
Diffstat (limited to 'libhb/muxavformat.c')
| -rw-r--r-- | libhb/muxavformat.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/libhb/muxavformat.c b/libhb/muxavformat.c index 266a3ae45..643c1d0dd 100644 --- a/libhb/muxavformat.c +++ b/libhb/muxavformat.c @@ -47,6 +47,8 @@ struct hb_mux_object_s int ntracks; hb_mux_data_t ** tracks; + + int64_t chapter_delay; }; enum @@ -194,6 +196,7 @@ static int avformatInit( hb_mux_object_t * m ) job->mux_data = track; track->type = MUX_TYPE_VIDEO; + track->prev_chapter_tc = AV_NOPTS_VALUE; track->st = avformat_new_stream(m->oc, NULL); if (track->st == NULL) { @@ -959,7 +962,11 @@ static int add_chapter(hb_mux_object_t *m, int64_t start, int64_t end, char * ti chap->id = nchap; chap->time_base = m->time_base; - chap->start = start; + // libav does not currently have a good way to deal with chapters and + // delayed stream timestamps. It makes no corrections to the chapter + // track. A patch to libav would touch a lot of things, so for now, + // work around the issue here. + chap->start = start + m->chapter_delay; chap->end = end; av_dict_set(&chap->metadata, "title", title, 0); @@ -973,6 +980,20 @@ static int avformatMux(hb_mux_object_t *m, hb_mux_data_t *track, hb_buffer_t *bu hb_job_t *job = m->job; uint8_t sub_out[2048]; + if (track->type == MUX_TYPE_VIDEO && + track->prev_chapter_tc == AV_NOPTS_VALUE) + { + // Chapter timestamps are biased the same as video timestamps. + // This needs to be reflected in the initial chapter timestamp. + // + // TODO: Don't assume the first chapter is at 0. Pass the first + // chapter through the pipeline instead of dropping it as we + // currently do. + m->chapter_delay = av_rescale_q(m->job->config.h264.init_delay, + (AVRational){1,90000}, + track->st->time_base); + track->prev_chapter_tc = -m->chapter_delay; + } // We only compute dts duration for MP4 files if (track->type == MUX_TYPE_VIDEO && (job->mux & HB_MUX_MASK_MP4)) { |