libfdk_aac - channel 3 is corrupt

[Amnon]

Summary of the bug:
How to reproduce:

ffmpeg -i test.wav -c:a libfdk_aac -ac 8 -f flv test.flv
ffmpeg -y -i test.wav -map_channel 0.0.3 ok_channel.wav
ffmpeg -y -i test.flv -map_channel 0.0.3 defect_channel.wav

​http://ffmpeg.itgb.net/test.wav
​http://ffmpeg.itgb.net/test.flv
​http://ffmpeg.itgb.net/ok_channel.wav
​http://ffmpeg.itgb.net/defect_chennel.wav

Patches should be submitted to the ffmpeg-devel mailing list and not this bug tracker.

[Cigaes]

Channel 3 is the subwoofer, the behaviour you observe is normal.

[Carl Eugen Hoyos]

The input file reports one channel as LFE, this is not correct.

For future tickets, please don't forget to provide the command line that allows to reproduce the issue together with the complete, uncut console output.

[Amnon]

The input file is 7.1

‘7.1’
FL+FR+FC+LFE+BL+BR+SL+SR

‘7.1(wide)’
FL+FR+FC+LFE+BL+BR+FLC+FRC

‘7.1(wide-side)’
FL+FR+FC+LFE+FLC+FRC+SL+SR

So one channel is LFE.
What exactly not correct?

[Carl Eugen Hoyos]

As you reported, the channel is not actually LFE, but an independent channel. Since the input file reports the channel as LFE, it is correct to encode it as LFE. LFE-encoded channels sound bad if they are not really LFE.