[FFmpeg-devel] [PATCH V1] lavf/mov: fix fMP4 tfdt box lead to dts reset issue

[Jun Zhao]

From: Jun Zhao <barryjzhao at tencent.com>

In fMP4 format, traf maybe have zero or more trun box, in this case,
we just used tfdt as dts once. The sample layout like this:

[moof] size=8+1392
  [mfhd] size=12+4
    sequence number = 29
  [traf] size=8+1368
    [tfhd] size=12+16, flags=20038
      track ID = 1
      default sample duration = 512
      default sample size = 40720
      default sample flags = 0
    [tfdt] size=12+8, version=1
      base media decode time = 1873920
    [trun] size=12+452, version=1, flags=e01
      sample count = 37
      data offset = 1408
    [trun] size=12+452, version=1, flags=e01
      sample count = 37
      data offset = 292973
    [trun] size=12+380, version=1, flags=e01
      sample count = 31
      data offset = 586457

Signed-off-by: Jun Zhao <barryjzhao at tencent.com>
---
 libavformat/mov.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/libavformat/mov.c b/libavformat/mov.c
index 24de542..d47d491 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -4762,6 +4762,7 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
             dts = frag_stream_info->tfdt_dts - sc->time_offset;
             av_log(c->fc, AV_LOG_DEBUG, "found tfdt time %"PRId64
                     ", using it for dts\n", dts);
+            frag_stream_info->tfdt_dts = AV_NOPTS_VALUE;
         } else {
             dts = sc->track_end - sc->time_offset;
             av_log(c->fc, AV_LOG_DEBUG, "found track end time %"PRId64
-- 
1.7.1