[FFmpeg-trac] #29(FFmpeg:new): Regression: Bad A/V sync for Panasonic camera recordings

[FFmpeg]

#29: Regression: Bad A/V sync for Panasonic camera recordings
----------------------+---------------------
  Reporter:  cehoyos  |      Owner:  michael
      Type:  defect   |     Status:  new
  Priority:  normal   |  Component:  FFmpeg
   Version:  git      |   Keywords:
Blocked By:           |   Blocking:
Reproduced:  0        |   Analyzed:  0
----------------------+---------------------
 samples/mplayer-bugs/bug1898/Panasonic.mts plays fine with ffplay,
 transcoding with ffmpeg leads to files with "shifted" audio (audio starts
 early). The conversion succeeds with FFmpeg 0.5.
 {{{
 ffmpeg -i Panasonic.mts -qscale 2 out.avi
 FFmpeg version git-N-28715-gd62c531, Copyright (c) 2000-2011 the FFmpeg
 developers
   built on Mar 30 2011 10:32:40 with gcc 4.5.2
   configuration: --cc=/usr/local/gcc-4.5.2/bin/gcc --enable-gpl
   libavutil    50. 40. 0 / 50. 40. 0
   libavcodec   52.116. 0 / 52.116. 0
   libavformat  52.104. 0 / 52.104. 0
   libavdevice  52.  4. 0 / 52.  4. 0
   libavfilter   1. 76. 0 /  1. 76. 0
   libswscale    0. 13. 0 /  0. 13. 0

 Seems stream 0 codec frame rate differs from container frame rate: 119.88
 (120000/1001) -> 29.97 (30000/1001)
 Input #0, mpegts, from 'Panasonic.mts':
   Duration: 00:00:14.49, start: 0.381078, bitrate: 15251 kb/s
   Program 1
     Stream #0.0[0x1011]: Video: h264 (High), yuv420p, 1280x720 [PAR 1:1
 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn, 119.88 tbc
     Stream #0.1[0x1100]: Audio: ac3, 48000 Hz, stereo, s16, 192 kb/s
 [buffer @ 0x11ff2c0] w:1280 h:720 pixfmt:yuv420p
 [setdar @ 0x122c860] a:16/9
 [setdar @ 0x122c860] w:1280 h:720 -> dar:16/9 sar:1/1
 Output #0, avi, to 'out.avi':
   Metadata:
     ISFT            : Lavf52.104.0
     Stream #0.0: Video: mpeg4, yuv420p, 1280x720 [PAR 1:1 DAR 16:9],
 q=2-31, 200 kb/s, 29.97 tbn, 29.97 tbc
     Stream #0.1: Audio: mp2, 48000 Hz, stereo, s16, 64 kb/s
 Stream mapping:
   Stream #0.0 -> #0.0
   Stream #0.1 -> #0.1
 Press ctrl-c to stop encoding
 frame=  435 fps= 55 q=2.0 Lsize=   17594kB time=14.54
 bitrate=9910.0kbits/s
 video:17444kB audio:114kB global headers:0kB muxing overhead 0.205926%
 }}}
 out.avi plays with constant ~2sec desync (video is late).

 ffplay plays the original sample fine:
 {{{
 ffplay -autoexit Panasonic.mts
 FFplay version git-N-28715-gd62c531, Copyright (c) 2003-2011 the FFmpeg
 developers
   built on Mar 30 2011 10:32:40 with gcc 4.5.2
   configuration: --cc=/usr/local/gcc-4.5.2/bin/gcc --enable-gpl
   libavutil    50. 40. 0 / 50. 40. 0
   libavcodec   52.116. 0 / 52.116. 0
   libavformat  52.104. 0 / 52.104. 0
   libavdevice  52.  4. 0 / 52.  4. 0
   libavfilter   1. 76. 0 /  1. 76. 0
   libswscale    0. 13. 0 /  0. 13. 0
 Input #0, mpegts, from 'Panasonic.mts':
   Duration: 00:00:14.49, start: 0.381078, bitrate: 15251 kb/s
   Program 1
     Stream #0.0[0x1011]: Video: h264 (High), yuv420p, 1280x720 [PAR 1:1
 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn, 119.88 tbc
     Stream #0.1[0x1100]: Audio: ac3, 48000 Hz, stereo, s16, 192 kb/s
   14.98 A-V:  0.000 s:0.0 aq=    0KB vq=    0KB sq=    0B f=0/0   f=0/0
 }}}

-- 
Ticket URL: <https://avcodec.org/trac/ffmpeg/ticket/29>
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