Sorry for the rotten english its not my native language
had recorded 1920x1080 30p on a 60D. HAD EXPORTED MATERIAL TO Apple Pro Res LT and also to HQ. editing went fine and run smooth.
Have to export to H.264, used with default settings: same size , compressor quality high and also tried best, tried frame rate 15fps, 12fps, 150fps. I have to be honest here DONT KNOW what I'm doing with this values but had to try anyway
The resulting video is jumpy. In the pannings it runs and then stops for an instant and the continues, every time in every panning. I had never had tho problem with a H.264 exporting