mp4 video to mp4 audio without reencode Problem with mobile phone player

[railbot]

Hello,

i need to convert / extract the audio stream of a mp4 video to a mp4 audio only file without re-encoding. In other words just remove the video stream from a mp4 file. The mp4 audio stream is aac.

I found the program SUPER 2009 which supports copy audio stream and disable video. The Problem is that my mobile phone (Samsung i8510 innov8) player does not play these files, winamp does.

Its also possible with this program to copy the audio stream to a aac file, which my mobile phone can play, but i want proper mp4 files. I also tried to convert the mp4 video with the in-build converter of winamp to audio only mp4. This file also works on the mobile phone but its reecoded with a specific bitrate.

I guess it has something to do with the mp4 header SUPER 2009 produces.

So does anybody know another program, which can do this? Or a program to repair / modify the mp4 audio only files to work with my mobile phone?

Thanks,
railbot