by Scintilla » Sat Mar 14, 2009 9:10 pm
1) See if the contest coordinator will let you submit an MPEG-2 that's 23.976fps with the 3:2 pulldown upon playback flag set. This will have the player convert the video to 29.97fps interlaced on the fly, saving you the trouble of having to convert it.
2) If that won't do, then ask the contest coordinator if the contest will be screened on a progressive or interlaced display.
2a) If progressive, then your best bet is probably to use AVISynth's ChangeFPS(), which will duplicate frames as necessary to get the frame rate up where it needs to be. This may make some motions slightly jerky, but it's better than having combing all over the place.
2b) If interlaced, then ask the coordinator which field order is preferred, and then use the ADTelecine() function found in the AMVapp. It was made for pretty much this exact purpose.