I am in the process of building my first video project with kdenlive. I do not have access to a camcorder, so all video was shot with a pair of point-and-shoot digital cameras. One being an Olympus FE-300 and the other being a new Nikon Coolpix. The default .avi files that both cameras generate appear in the "add clip" dialog and appear to be supported.

I used avidemux (with default output settings) to do some simple cuts/trims of the raw camera .avi files prior to adding them to kdenlive. When it came time to add them to the project, they didn't show up. If I select "show all files" I can still add them and I feel like I can manipulate them just fine. Anyone know why they wouldn't show up as supported file types?

http://fixounet.free.fr/avidemux/

http://avidemux.org/admWiki/index.php?title=Output_formats

The avi files that avi produces are sometimes, somehow, not completely standards-compliant (as far as avi can be called a standard).

Are your avi files bigger than 4 Gb?

It might help to remux the files using ffmpeg or mencoder:

ffmpeg -i existing_avi -acodec copy -vcode copy -f avi new_avi
mencoder -oac copy -ovc copy -o new_avi existing_avi