[FFmpeg-trac] #110(avformat:open): MP4 Muxer gives incorrect frame duration with AAC

FFmpeg trac at avcodec.org
Mon Apr 25 22:09:25 CEST 2011


#110: MP4 Muxer gives incorrect frame duration with AAC
-----------------------+-----------------------
Reporter:  thebombzen  |       Owner:
    Type:  defect      |      Status:  open
Priority:  normal      |   Component:  avformat
 Version:  git         |  Resolution:
Keywords:              |  Blocked By:
Blocking:              |  Reproduced:  0
Analyzed:  0           |
-----------------------+-----------------------

Comment (by thebombzen):

 I have confirmed that this error still occurs with git-N-29369-g03a91c7,
 built April 25.

 ffmpeg version git-N-29369-g03a91c7, Copyright (c) 2000-2011 the FFmpeg
 developers
   built on Apr 25 2011 16:05:01 with gcc 4.5.1 20100924 (Red Hat 4.5.1-4)
   configuration: --enable-static --enable-shared --enable-gpl --enable-
 version3 --enable-nonfree --enable-postproc --enable-x11grab --enable-
 runtime-cpudetect --enable-bzlib --enable-frei0r --enable-libopencore-
 amrnb --enable-libopencv --enable-libdc1394 --enable-libfaac --enable-
 libfreetype --enable-libgsm --enable-libmp3lame --enable-libopenjpeg
 --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-
 libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-
 libxavs --enable-libxvid --enable-zlib --arch=x86_64 --cpu=i7 --enable-pic
 --enable-sram --extra-libs=-lx264 --extra-cflags='-O3 -w'
   libavutil    51.  0. 0 / 51.  0. 0
   libavcodec   53.  1. 0 / 53.  1. 0
   libavformat  53.  0. 3 / 53.  0. 3
   libavdevice  53.  0. 0 / 53.  0. 0
   libavfilter   2.  0. 0 /  2.  0. 0
   libswscale    0. 13. 0 /  0. 13. 0
   libpostproc  51.  2. 0 / 51.  2. 0

 The FAAD message still holds:

 SI.m4a file info:

 LC AAC  225.617 secs, 2 ch, 44100 Hz

 tool: Lavf53.0.3

 //channel config

 MP4 seems to have incorrect frame duration, using values from AAC data.
 Decoding SI.m4a took:  0.81 sec. 278.54x real-time.

-- 
Ticket URL: <http://ffmpeg.org/trac/ffmpeg/ticket/110#comment:2>
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