[FFmpeg-user] adding an ac3 stream to an a/v stream

[Andrew RT]

I've searched online for ways to do this, but the solutions I've found don't seem to work:

AFAICT (correct me if i'm wrong), the "-acodec copy" and similar options are obsolete, as well as "-newaudio" and things like that.

So, one command I found did not throw any errors, but the result is a file with static/buzzing audio:

ffmpeg -i myvideo.avi -i extra_audio.ac3  -map 0:0 -map 0:1 -map 1:0  -codec:v:0 copy -codec:a:0 copy -codec:a:1 copy  muxed_output.avi


This yields a playable "muxed_output.avi", but the audio starts out with an obnoxious buzz, which is followed by continuous digital static.

Any suggestions?

I've got a newly built ffmpeg --

ffmpeg version N-51346-gace0cfe Copyright (c) 2000-2013 the FFmpeg developers
  built on Mar 27 2013 16:23:10 with gcc 4.4.3 (Ubuntu 4.4.3-4ubuntu5.1)

thanks.