Carl Eugen Hoyos <[email protected]> added the comment:

You originally claimed that your problem is related to multi-channel audio and
the WAVEFORMATEX structure (0x2000 vs 00001000-0000-0020-8000-00AA00389B71).

The problem - that high-bitrate ac3 in avi muxed by ffmpeg can still be decoded
by ffmpeg, but not played by MPlayer and WMP - is perfectly reproducible for
stereo sound, just use ffmpeg -i file -acodec ac3 -ac 2 -ab 448k out.avi.

The resulting file(s) can be transcoded with ffmpeg, but not played with ffplay
(see issue 2455).

----------
status: closed -> open
substatus: invalid -> open
title: Muxing Xvid and 5.1 ac3 into .avi container broken -> Muxing ac3 >384kb 
into .avi container broken

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FFmpeg issue tracker <[email protected]>
<https://roundup.ffmpeg.org/issue2446>
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