How to change a track ID with ffmpeg or MP4Box?

I need to change the id of a video track in an mp4 container and of course without re-encoding. How can I do that with ffmpeg or MP4Box ? Is that even possible ?

With MP4Box you can fine-tune these parameters (more in MP4Box -h general):

• -set-track-id id1:id2 changes the id of a track from id1 to id2
• -swap-track-id id1:id2 swaps the IDs of the identified tracks

Example:

• inplace: MP4Box -set-track-id 100:101 file.mp4
• new file: MP4Box -set-track-id 100:101 file.mp4 -out new.mp4