Bug#894191: ffmpeg: silence when copying AAC (LC) from MKV to AVI

[Рома Тенцер]

Here's a part of it (all file is too big).

I find a warning in ffmpeg/ffprobe output:

"[aac @ 0x169bc80] This stream seems to incorrectly report its last 
channel as LFE[3], mapping to LFE[0]"

I can't reproduce this bug with other files, so i think it can be a problem.

And i was wrong, it's not a silence. It's a low volume level in avi.

I use this command:

"ffmpeg -i sample.mkv -c:v mpeg4 -q:v 1 -c:a copy sample.avi"

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