I have used avidemux to edit video on Linux. I don't have a lot of experience with it but it was easy to use and according to the Wiki, it can save video without the audio, and it can join an external audio track to the video.
I have used avidemux to edit video on Linux. I don't have a lot of experience with it but it was easy to use and according to the Wiki, it can save video without the audio, and it can join an external audio track to the video.