I'm trying to do some screencasting, but since my computer is much too old and slow the video being produced is laggy and the application I'm trying to record becomes unresponsive due to the CPU consumption. Since I can't upgrade at the moment, I'm looking to optimize what I have.
I switched from GNOME to OpenBox, and I've killed unnecessary processes, etc. Still no good. I've also optimized the application I'm recording, so the only thing left would be the recorder itself, which is FFMpeg.
What are some options and flags that can be used to get the best performance out of FFMpeg? Are there any specific codecs that are easier to process than others? I'll be recording about 10-15 mins at a time, so something that doesn't produce HUGE files sizes would also be appreciated. Any ideas?