[FFmpeg-trac] #1002(avcodec:new): AV out of sync on hTC 7 Mozart

FFmpeg trac at avcodec.org
Fri Feb 17 14:43:10 CET 2012


#1002: AV out of sync on hTC 7 Mozart
---------------------------------+---------------------------------------
             Reporter:  zxvc     |                     Type:  defect
               Status:  new      |                 Priority:  normal
            Component:  avcodec  |                  Version:  unspecified
             Keywords:           |               Blocked By:
             Blocking:           |  Reproduced by developer:  0
Analyzed by developer:  0        |
---------------------------------+---------------------------------------
 I could find a x264 bug!?

  My smartphone is hTC 7 Mozart.
  It supports .mp4 + H.264 + HE-AAC v2.

  I rip three DVD by MeGUI with x264 and Nero AAC.
  The x264 configuration is:
  auto 2-pass + 800 Kbps + main profile + preset medium (I also tried "very
 fast")

  I find all three movies have the video lag problem
  such that audio and video are out of sync.
  An amazing fact is that the video lag times are all between
  the time interval 34:00-36:00 (seconds).
  However, those files are played well without sync problem on PC.
  After I change the x264 preset to ultra fast,
  the sync problem also disappear on my phone.

  The three DVD are:
  It Happened In One Night
  Funny Face
  Scaramouche

 The attached html shows the MediaInfo of "It Happened In One Night" with
 preset "very fast" and having the sync problem.

  Could anyone explain this problem?

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1002>
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