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I have a series of x86 machines for converting multimedia, but an  bug
from avconv(from libav-tools.deb) annoyed me for a long time (and it
even happen in 14.10) that mixing video and audio using avconv generated
a bad media output - output video is continuity continuously suspended,
which cannot be used (output audio is okay).

Finnally, I find out that it only happens in 32bit 14.04 and 14.10, but
it's hard to replace i386 to amd64.

        A command to reproduce the bug:

	> avconv -f x11grab -i :0.0 -f alsa -i pulse -f flv -ar 22050 test.flv
	

	Ubuntu 12.04.5	i386:good,	amd64:good
	Ubuntu 13.10	i386:good,	amd64:good
	Ubuntu 14.04.1	i386:bad,	amd64:good
	Ubuntu 14.10	i386:bad,	amd64:good
	
	
	'bad' warning forever:

        Non-monotonous DTS in output stream 0:1; previous: 3947,
current: 3891; changing to 3947. This may result in incorrect timestamps
in the output file.

	
	Need help, thanks!

** Affects: libav (Ubuntu)
     Importance: Undecided
         Status: New

-- 
avconv from libav-tools.deb generate bad video in trusty/utopic but only "happened in i386 not amd64"
https://bugs.launchpad.net/bugs/1386218
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