I'm editing video clips that require 2-3 video overlays, and crop transfoms and find playback rather sluggish with these effects - even with proxy clips. I noticed the defauld proxy settings use mpeg2 which to my knowledge is a compressed format. Are there any uncompressed codecs I can render the proxy clips with to see if there is a noticable boost in performance?

Thanks!

why would you expect uncompressed proxy clips to perform better? Yes you don't have to uncompress them for play back - but you do have to ship loads of data around.

I figured that uncompressed files shouldn't consume that much bandwith as long as the resolution is low. My hard disk and ram aren't coming under much load, but my processor is having tofight toth and nail to keep up.

Right. I don't use proxy clips. But you know you can set up your own profile for proxy clips. So you could try an uncompressed one.
See Settings>Configure Kdenlive>Project Defaults
http://userbase.kde.org/Kdenlive/Manual ... t_Defaults
The parameters are ffmpeg parameters. Find help on them by issuing ffmpeg -h at a command line.

ttguy wrote:Right. I don't use proxy clips. But you know you can set up your own profile for proxy clips. So you could try an uncompressed one.
See Settings>Configure Kdenlive>Project Defaults
http://userbase.kde.org/Kdenlive/Manual ... t_Defaults
The parameters are ffmpeg parameters. Find help on them by issuing ffmpeg -h at a command line.

Thanks! I will give that a try and see if it helps or not.