mencoder with -oac mp3lame create loud static audio

[hackeron]

Binary package hint: mencoder

The current version of mplayer/mencoder in gutsy creates broken audio (crackly, static filled, difficult to make out words, etc) when used with -ao mp3lame.

A version compiled from svn doesn't have such a problem.

[jim lebans (jlebans)]

I'm having the same problem in Fiesty. Calling liblame0 from mencoder either directly through:

mencoder -oac mp3lame (etc...)

or indirectly through lavc leads to highly distorted, overmodulated audio. Passing through the audio (with -oac copy) or outputting it as pcm doesn't, so I think its the call to the encoder that's leading to the problem.

[jim lebans (jlebans)]

Revision - sorry, but it turns out that pcm encoding has the same problem (-oac copy doesn't) so it may have something to do with the decoding of the audio (in my case an mp2 stream).

JL

[Jani Alinikula (janialinikula)]

I can confirm this (in MEncoder 2:1.0~rc1-0ubuntu13). -oac copy works, mp3lame and pcm don't work. Mplayer is not affected. Mencoder uses (autodetects) mp3lib for audio decoding, mplayer libmad.

Adding -afm libmad to mencoder command line works as a workaround.

The distortion sounds like an endianness problem - horrible buzzing distortion, but the sound also has a clean component.