id,summary,reporter,owner,description,type,status,priority,component,version,resolution,keywords,cc,blockedby,blocking,reproduced,analyzed
2153,aac 7.1 channel layout,Crayden,,"Looking at the specification from
http://developer.apple.com/library/mac/#documentation/MusicAudio/Reference/CoreAudioDataTypesRef/Reference/reference.html#//apple_ref/doc/c_ref/kAudioChannelLayoutTag_AAC_7_1
the channels are decoded correctly for 7.1 aac files but it looks like they're mapped/mixed in the wrong way resulting in the following output behaviour:
left -> left + center
center -> center
right -> right + center
right surround -> right
left surround -> left
right rear surround -> right rear surround
left rear surround -> left rear surround
lfe -> lfe

Since most players and audio drivers don't handle this specific layout correctly it may be wise to convert the layout for 7.1 channel aac files to a standard layout.

This issue has already been fixed in the ffmpeg fork for LAV-Filter. Take a look at:
http://git.1f0.de/gitweb?p=ffmpeg.git;a=commit;h=dfcbfd57c35bbef83df5c5256485e5bfa6f81f41

If you need a test file:
https://www.dropbox.com/s/csnm34xap2176sv/Channel%20Check%20Lots%20of%20Formats.mkv
(make sure to select the 7.1 channel aac track)",defect,closed,normal,avcodec,git-master,worksforme,7.1 aac,,,,0,0