October 8th, 2003, 09:21 AM
I have been working on a project that had some 3d animations rendered out in 60fps (.mov) I have also seen where deinterlacing video will make it a 60fps clip.
My question is .... what are the theories and usefullness of having video rendered or converted into other frame rates.
Normally I am NTSC 29.97fps
October 8th, 2003, 10:10 AM
The 60 frames/s is probably meant to be interlaced to 30fps (29.97), so you get the field-motion look.. but it also works the other way around, that is you can make the clip play in slowmotion by splitting the two fields and making a new frame of each of the two fields, altho you effectively cut the Y resolution in half by doing so. Over here we work in PAL 25fps, it's a lot easier to calculate IMO :)
October 8th, 2003, 10:39 AM
When I was working in NTSC TV land, we never really worked with video plates, but often had to integrate them into our shots. Since we were primarily a visual effects house for TV series and movies of the week and occasional features, all the shows we had originated on film (We got one when I was working there, and it was a mess to complete). They would should in 35mm, and then downconvert to Dbeta at 30fps cine-expanded. We'd take the shots into flame or inferno, and cine-compress them back to their original 24fps, and work on them at that rate.
When we were handed a video element shot at 29.97 or 30fps, we'd have to timewarp the footage slower, so it'd fit into our 24fps plates, and then cine-expand back to 30fps for TV output. It was a bit convoluted, but it worked.