[FFmpeg-trac] #2400(undetermined:new): when merging audio and video to mp4 , the audio / video not syncdiated correctly

[FFmpeg]

#2400: when merging audio and video to mp4 , the audio / video not syncdiated
correctly
-------------------------------------+-------------------------------------
             Reporter:  chinshou     |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------

Comment (by chinshou):

 Hello,

 same problem with the internal codec.

 C:\Conversion>ffmpeg -i aaa.mp4 -i bbb.mp4 -vcodec mpeg4 -strict -2
 -acodec aac
 test.mp4
 ffmpeg version N-51211-ge0e8c20 Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Mar 22 2013 08:56:38 with gcc 4.7.2 (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. 22.101 / 52. 22.101
   libavcodec     55.  1.100 / 55.  1.100
   libavformat    55.  0.100 / 55.  0.100
   libavdevice    55.  0.100 / 55.  0.100
   libavfilter     3. 48.100 /  3. 48.100
   libswscale      2.  2.100 /  2.  2.100
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  2.100 / 52.  2.100
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'aaa.mp4':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2avc1mp41
     encoder         : Lavf54.59.102
   Duration: 00:00:08.71, start: 0.000000, bitrate: 245 kb/s
     Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
 1366x768,
  241 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc
     Metadata:
       handler_name    : VideoHandler
 Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'bbb.mp4':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2mp41
     encoder         : Lavf54.59.102
   Duration: 00:00:00.13, start: 0.023220, bitrate: 9029 kb/s
     Stream #1:0(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo,
 fltp, 89
 40 kb/s
     Metadata:
       handler_name    : SoundHandler
 File 'test.mp4' already exists. Overwrite ? [y/N] y
 Output #0, mp4, to 'test.mp4':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2avc1mp41
     encoder         : Lavf55.0.100
     Stream #0:0(und): Video: mpeg4 ( [0][0][0] / 0x0020), yuv420p,
 1366x768, q=2
 -31, 200 kb/s, 30k tbn, 29.97 tbc
     Metadata:
       handler_name    : VideoHandler
     Stream #0:1(und): Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz,
 stereo, flt
 p, 128 kb/s
     Metadata:
       handler_name    : SoundHandler
 Stream mapping:
   Stream #0:0 -> #0:0 (h264 -> mpeg4)
   Stream #1:0 -> #0:1 (aac -> aac)
 Press [q] to stop, [?] for help
 frame=   10 fps=0.0 q=6.2 size=     343kB time=00:00:00.33
 bitrate=8410.3kbits/s
 frame=   93 fps= 93 q=31.0 size=     343kB time=00:00:03.10 bitrate=
 904.3kbits/
 frame=  180 fps=120 q=31.0 size=     343kB time=00:00:06.00 bitrate=
 467.2kbits/
 frame=  261 fps=130 q=31.0 Lsize=    1986kB time=00:00:08.70
 bitrate=1868.6kbits
 /s
 video:1859kB audio:124kB subtitle:0 global headers:0kB muxing overhead
 0.196587%

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2400#comment:2>
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