[FFmpeg-trac] #929(avcodec:new): AAC 5.1 channel decoding issue

FFmpeg trac at avcodec.org
Sat Jan 21 18:06:26 CET 2012


#929: AAC 5.1 channel decoding issue
------------------------------------+-----------------------------------
             Reporter:  kaijun61    |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avcodec
              Version:  git-master  |               Resolution:
             Keywords:  AAC         |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
------------------------------------+-----------------------------------
Changes (by cehoyos):

 * version:  unspecified => git-master


Comment:

 Replying to [comment:2 kaijun61]:
 > it sounds like 5 channels not downmixed when compared with a DSP aac
 codec.
 >
 > ffmpeg -i test.mp4

 Since the command line you provide does not downmix anything (it only
 prints information about a media file and you do not claim that anything
 about the printed information is wrong), I don't think anybody could
 reproduce your issue.
 Please provide a ffmpeg command line that allows to reproduce the problem
 together with the complete, uncut console output.

 > ffmpeg version git-2012-01-20-003b81b Copyright (c) 2000-2012 the FFmpeg
 developers
 >   built on Jan 20 2012 21:40:59 with gcc 4.5.3 20110311 (prerelease)
 >   configuration: --enable-shared --enable-pthreads --disable-stripping
 --disable-gpl --disable-postproc --disable-avfilter --enable-swscale
 --enable-swresample --enable-neon --enable-pic --enable-debug --enable-
 ffmpeg --enable-ffplay --disable-avprobe --disable-avserver --cross-prefix
 =arm-angstrom-linux-gnueabi- --prefix=/usr --disable-x11grab --disable-
 libgsm --enable-libmp3lame --enable-libschroedinger --enable-libtheora
 --enable-libvorbis --disable-libvpx --arch=arm --target-os=linux --enable-
 cross-compile --disable-optimizations --extra-cflags=' -O0 -fno-omit-
 frame-pointer -ggdb3 -march=armv7-a -mtune=cortex-a8 -mfpu=neon -mfloat-
 abi=softfp -mthumb-interwork -mno-thumb
 --sysroot=/home/tang/Projects/OE/build/tmp/sysroots/armv7a-angstrom-linux-
 gnueabi' --extra-ldflags='-Wl,-O1 -Wl,--hash-style=gnu'
 --sysroot=/home/tang/Projects/OE/build/tmp/sysroots/armv7a-angstrom-linux-
 gnueabi --enable-hardcoded-tables --cpu=cortex-a8
 >   WARNING: library configuration mismatch

 While this is probably not related, you could make testing and reproducing
 the problem much easier if you you compiled without "--enable-shared"

 Any reason why you compile with "--disable-optimizations"?

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/929#comment:3>
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