[MEncoder-users] Problem when joining two video files

[RC]

On Wed, 12 Dec 2007 11:25:27 +0000 (UTC)
ApplePro <applepro7777 at gmail.com> wrote:

> Cannot mix video-only files with audio and video files. Try -nosound.

That's clearly your problem.  Mencoder can't find the audio in
logo7.avi.

You can try playing the file with -demuxer lavf or -ni and see if it can
detect the audio stream then.