AAC audio track how to mux it

[eymerich]

Hi,

I have an MP4 video with AAC audio at constant bit rate.
I can extract the audio track in raw audio.aac file with ffmpeg or avidemux

ffmpeg -i "input.mp4" -acodec copy audio.aac

Then I need to use that audio track into a different video.
MP4Box is not working: seems the AAC file is missing the bitrate (128K) and produces the following error
[17:03:50] : Error - 2 input names specified, please check usage
Avidemux is not able to import .aac file

What is the proper workflow to extract the audio without re-encoding (do I need a container for the raw aac?) and use it with a different video into an MP4 container?

Any suggestion?

Thank you!!!

[poisondeathray]

Try the new yamb beta2

http://yamb.unite-video.com/