diff options
Diffstat (limited to 'libhb/reader.c')
| -rw-r--r-- | libhb/reader.c | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/libhb/reader.c b/libhb/reader.c index 7f1e7cc1a..53a8180a1 100644 --- a/libhb/reader.c +++ b/libhb/reader.c @@ -159,9 +159,29 @@ static int hb_reader_open( hb_work_private_t * r ) return 1; if (r->job->start_at_preview) { - hb_stream_seek(r->stream, (float)(r->job->start_at_preview - 1) / - (r->job->seek_points ? (r->job->seek_points + 1.0) - : 11.0)); + // First try seeking to PTS title duration / (seek_points + 1) + float frac = (float)(r->job->start_at_preview - 1) / + (r->job->seek_points ? (r->job->seek_points + 1.0) + : 11.0); + int64_t start = r->title->duration * frac; + if (hb_stream_seek_ts(r->stream, start) >= 0) + { + // If successful, we know the video stream has been seeked + // to the right location. But libav does not seek all + // streams (e.g. audio and subtitles) to the same position + // for some stream types (AVI). Setting start_found = 0 + // enables code that filters out packets that we receive + // before the correct start time is encountered. + r->start_found = 0; + r->job->reader_pts_offset = AV_NOPTS_VALUE; + } + else + { + // hb_stream_seek_ts only works for libav streams. + // TS and PS streams have not index and have timestamp + // discontinuities, so we seek to a byte position in these. + hb_stream_seek(r->stream, frac); + } } else if (r->job->pts_to_start) { |