[Oliver Tosh] “I am trying to work on a video that is 1024×768.”
That is a really unusual frame size – are you sure it’s what you want? 1024×576 is common for 16:9 square pixel PAL, or 1050×576 if you are Adobe or the BBC (don’t ask!). Your frame size is a 4:3 ratio – is that what you mean?
If so, you are best off editing in a 1920×1080 project (pillar-boxing your source material), and exporting a Movie that you can then run through Compressor to get your final frame size, cropping as appropriate. Anything else and you will be losing resolution in the edit which you obviously want to avoid.
I should add that most NLE’s struggle in one way or another with non-standard frame sizes … not just FCPX.
Simon Ubsdell
Director/Editor/Writer
http://www.tokyo-uk.com