Aspect Ratio & Progressive Scan

[kickass331]

Don't listen to kickass. He's trolling.

no, 24 fps is the number of actual frames in ntsc. at 30fps interlaced, every 5th frame is interleaved. It is inserted to transition, if you understand what the process of telecining is, you'd understand why you want 24 fps for IVTC which you should always do to NTSC... follow the guides!

This is based on the assumption that he has telecined material or that he isn't required to have some other fps settings due to some situation (ie: con requirements). Which could be very well wrong.
Also, you likely meant that every 5th frame is a duplicate, since the amount of interlaced frame in every set of 5 in a 3:2 pulldown is 2.

no, I was trying to state how every 5th frame pulls 2 half frames from the b frames which represents one frame since interlace represents half interpolated fields.

[Kionon]

Don't listen to kickass. He's trolling.

no, 24 fps is the number of actual frames in ntsc. at 30fps interlaced, every 5th frame is interleaved. It is inserted to transition, if you understand what the process of telecining is, you'd understand why you want 24 fps for IVTC which you should always do to NTSC... follow the guides!

I wrote one of the guides.

Telecining

NTSC Film runs at a speed of 24 frames per second (fps). NTSC Video runs at a speed of 30fps. These frames are usually interlaced as well. Showing a film in video requires adding extra frames- 6 for every second. Or for every four frames, add one. Simply removing interlacing from NTSC material will produce an effect where two frames appear to be overlaid, creating an effect known as “ghosting”. If you have deinterlaced, and you get ghosting, then your footage is a prime candidate for inverse telecining, which undoes the telecine process and produces footage that looks right.

Interlacing

Quite literally, interlacing was created to update the image twice as often, but only send half the content. Originally designed to compress video inside radio waves for broadcast television, interlacing only looks right on an old cathode ray tube television. On LCD or plasma monitors/TVs, interlaced content appears as lines where the two half images meet and alternate. Deinterlacing determines how to put the lines in the proper order, creating a sustained clear picture.