"Postby anomad » Mon Jun 29, 2015 3:37 am
. if you search the forums, there is a lot of discussion regarding performance of clips on various machines.
. in short, download MPEG Streamclip ( http://www.squared5.com/svideo/mpeg-streamclip-mac.html
. convert your clips to MJPEG-B , 85%, no audio. you're using a lot of CPU to decode the H.264 files...
. run them from the SSD, change your preferences so that files are run from disk if greater than a small amount (~10MB) so they'll just play off the SSD"