[FFmpeg-trac] #2892(undetermined:new): MPEG tbn value incorrectly evaluated: causes MOV wrap to fail

[FFmpeg]

#2892: MPEG tbn value incorrectly evaluated: causes MOV wrap to fail
-------------------------------------+-------------------------------------
             Reporter:  ortoni       |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 A longstanding bug in determining the tbn value for an mpeg source now
 prevents adding timecode to imx MOV format
 How to reproduce:
 {{{
 % ffmpeg.exe -i test.mov -c:v copy -c:a copy -vtag mx3n -timecode
 10:00:00:00 out.mov
 ffmpeg version 1.2 Copyright (c) 2000-2013 the FFmpeg developers
   built on Mar 28 2013 00:28:48 with gcc 4.8.0 (GCC)
   configuration: --enable-gpl --enable-version3 --disable-w32threads
 --enable-av
 isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls
 --enab
 le-libass --enable-libbluray --enable-libcaca --enable-libfreetype
 --enable-libg
 sm --enable-libilbc --enable-libmp3lame --enable-libopencore-amrnb
 --enable-libo
 pencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp
 --enable-li
 bschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora
 --enable-lib
 twolame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis
 --enabl
 e-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
   libavutil      52. 18.100 / 52. 18.100
   libavcodec     54. 92.100 / 54. 92.100
   libavformat    54. 63.104 / 54. 63.104
   libavdevice    54.  3.103 / 54.  3.103
   libavfilter     3. 42.103 /  3. 42.103
   libswscale      2.  2.100 /  2.  2.100
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  2.100 / 52.  2.100
 Guessed Channel Layout for  Input Stream #0.1 : stereo
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mov':
   Metadata:
     major_brand     : qt
     minor_version   : 512
     compatible_brands: qt
     creation_time   : 1970-01-01 00:00:00
   Duration: 00:00:30.03, start: 0.000000, bitrate: 32315 kb/s
     Stream #0:0(eng): Video: mpeg2video (4:2:2) (mx3n / 0x6E33786D),
 yuv422p, 72
 0x512 [SAR 128:135 DAR 4:3], 30006 kb/s, 29.97 fps, 29.97 tbr, 30k tbn,
 59.94 tbc
     Metadata:
       creation_time   : 1970-01-01 00:00:00
       handler_name    : Apple Alias Data Handler
       timecode        : 00:00:10;00
     Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz,
 stereo, s32, 2304 kb/s
     Metadata:
       creation_time   : 1970-01-01 00:00:00
       handler_name    : Apple Alias Data Handler
     Stream #0:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s
     Metadata:
       creation_time   : 2013-02-07 15:58:36
       handler_name    : Apple Alias Data Handler
       timecode        : 00:00:10;00
 Output #0, mov, to 'out.mov':
   Metadata:
     major_brand     : qt
     minor_version   : 512
     compatible_brands: qt
     timecode        : 10:00:00:00
     encoder         : Lavf54.63.104
     Stream #0:0(eng): Video: mpeg2video (mx3n / 0x6E33786D), yuv422p,
 720x512 [S
 AR 128:135 DAR 4:3], q=2-31, 30006 kb/s, 29.97 fps, 30k tbn, 30k tbc
     Metadata:
       creation_time   : 1970-01-01 00:00:00
       handler_name    : Apple Alias Data Handler
       timecode        : 00:00:10;00
     Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz,
 stereo, 23
 04 kb/s
     Metadata:
       creation_time   : 1970-01-01 00:00:00
       handler_name    : Apple Alias Data Handler
 Stream mapping:
   Stream #0:0 -> #0:0 (copy)
   Stream #0:1 -> #0:1 (copy)
 Press [q] to stop, [?] for help
 frame=  626 fps=0.0 q=-1.0 size=   78835kB time=00:00:20.85
 bitrate=30968.0kbits
 fps 30000 is too large
 frame=  900 fps=0.0 q=-1.0 Lsize=  118466kB time=00:00:30.03
 bitrate=32316.7kbits/s
 video:109998kB audio:8446kB subtitle:0 global headers:0kB muxing overhead
 0.018463%
 ffmpeg version
 built on ...
 }}}

 Thanks in advance

 m

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2892>
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