Everytime I try to export a 720x640 or 1280x720 project in P4E using the Quicktime container with H.264 compression my system hangs somewhere in the conversion process. Is anyone else seeing this issue? I can export using the iphone preset using H.264 but I cannot export 720p with this preset AFAIK.
Also, I think I would like to be able to export to Flash Video files using H.264 but PE4 limits me to Spark Sorensen or On2 VP6. Does PE7 allow for FLVs to be made using H.264 compression? Am I missing something here?
Firstly have you updated your Quicktime? Rather then exporting via Quicktime why not export directly to H.264? Use the MPEG export option, select a H.264 preset and go into Advanced and set the frame size to 1280x720.
Not do much Flash export so cant help here I am afraid.