I’m working on a Mac, using Lion (10.7.3). I’m using FCPX (version 10.0) and making sequences using audio and still photos. I am then exporting the sequences as QuickTime files using the Apple ProRes 422 codec. Then, I'm importing the files into MPEG Streamclip to convert them into H.264, and again exporting them as QuickTime files. I’m using them in a web-based doc, so the smaller file, the better. It has been working perfectly except for when I use the transition tool in FCPX to add cross-dissolves between the photos. This makes it so that for whatever reason, MPEG Streamclip doesn’t compress the files properly, the photos are all pixilated. Anyone have any idea why this is happening?