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I don't quite follow. Feel free to define a custom composition size as you see fit. Indeed AE does not provide presets for everything, but given the plethora of possible output targets, this cannot be the goal of such an exercise. You should only use the DVCPro preset, if you plan on roundtripping without modifying the resolution, i.e. writing the modified clips back to a tape with the same specs/ via the same deck. The more interesting question here is, whether the stuff will actually be played via such a deck on the event or if it e.g. will be output from a BluRay disc via a Playstation or something. In the latter case they'd probably even prefer it to remain at the original full HD res for output via HDMI without extra conversions, as the 960x res would be of no use to them...
Thanks and just got back from a test. What you say is dead on.
I have a job yet to do however where I will have to take a variety of HD sources and combine them in AE and then output to 1280 x 720. I remain unsure about how to do this without having some distortion via pixel aspect ration and/or frame size problems. But I will try what you say, and output custom via Animation compressor and avoid DVC PRO HD presets altogether. That may just do it.
While AE may not provide custom composition presets for everything, these problems should be covered correctly by the automatic footage interpretation. Therefore, your 960x720 pixel footage will be correctly "un-squeezed" when dropping it into a 1280x720 comp. Regardless of this, you can of course always enforce a different interpretation to correct any mix&match issues.
If I'm not mistaken, the Canon 5D mkII shoots square-pixel 1920 x 1080 30p, so that's how you should interpret the footage. Just drop that into a comp with a 1280 x 720, square pixels at 30 fps and you're good to go.
- Jonas Hummelstrand