I'm trying to follow this tutorial on Datamoshing [url]http://www.youtube.com/watch?v=uUkEIVixcbo[/url]. As ffmpegx isn't available for Ubuntu I'm trying a few different programs with that functionality and kdenlive looks quite good. Right now I'm getting stuck at around 2:50 when he starts editing the i-frames of a movie.

Does kdenlive have the ability to edit the iframes of a movie?

No

Thanks for the concise, quick response!

Do you know of any programs for Ubuntu/Linux (other than ffmpeg via the command line) that can do it?