Avconv Can not resample 6 channels

[Beckend]

I'm getting a message, that it cannot resample 6 channels into 2 channel audio. This is the command i'm using to convert into h.264+aac:

avconv -i /var/movies/Some.movie.2010.BDRip.XviD.AC3.-HQ-ViDEO.avi -strict experimental -acodec aac -ac 2 -ab 128k -ar 44100 -y -c:v libx264 -qscale 1 -s 640x480 -g 25 -r 25 /path/to
Exact message:

Resampling output channel count must be 1 or 2 for mono input; 1, 2 or 6 for stereo input; or N for N channel input.
Can not resample 6 channels @ 48000 Hz to 2 channels @ 44100 Hz
I have tried so many configurations, have tired experimenting.

Any video guru out there? Some tip would be awesome.

Thanks.

I'm using:
avconv version 0.8.6-4:0.8.6-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers
built on Apr 2 2013 17:02:36 with gcc 4.6.3

[Selur]

-> http://www.ffmpeg.org/ffmpeg-filters.html#Mixing-examples should be able to do the job,...
(personally I use sox for downmixing -> http://forum.doom9.org/showthread.php?t=152034 and from the looks of it one can probably 'translate' the sox calls I use into ffmpeg calls)

[Beckend]

Interesting i'll test that out. Thanks.

[Beckend]

After installing lastest version of avconv from their git, all is working. Topic is closed.

[Selur]

Did you use the code from the example or did you adjust it to another downmix?