How do I export ATI 4:2:2 video to SheerVideo?
The easiest way is to use QuickTime 6+. ATI’s “best or 4:2:2” codec incorrectly sets the pixel depth to 16 instead of 24. QuickTime 6 ignores this error, permitting you to export it to SheerVideo Y’CbCr 8bw 4:2:2. QuickTime 5 ignores the error for playback, but not for export. If you need to use QuickTime 5, you can correct the depth setting yourself with Apple’s Dumpster utility. Open the ATI-captured movie with Dumpster, and look for a ‘trak’ Track whose ‘stsd’ Sample Description (under ‘mdia’:’minf’:’stbl’:) has a “dataFormat” of type ‘yuv2’ and “name” “ATI Video 4:2:2”. In the “depth” field, replace the number 16 with 24. Finish by choosing File>Save and File>Quit.
