How can I dub an audio track over a video I'm making with avconv?

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http://askubuntu.com – So to start out with, I having figured out how to animate a number of still frames into a video, like this: avconv -f image2 -i %06d.png -r 24 -qscale 1 aniron.avi I have a bunch of files in the directory named 000000.png, 000001.png, 000002.png. I am able to make a video of sufficiently high quality this way. However, efforts to add an audio track by putting "-i aniron.mp3" and a few other options have failed thus far. I always get this: avconv version 0.8.5-4:0.8.5-0ubuntu0.12.04.1, Copyright (c) 2000-2012 the Libav developers built on Jan 24 2013 18:03:14 with gcc 4.6.3 [mp3 @ 0x8623 (HowTos)