Convert 24 to 30 fps.

[David Jimerson]

Well, no. You can encode 24p files (commercial films do this). They contain flags for insertion of pulldown by the player.

Now, on a theoritical level, the 24p frames may stored as two "48i" fields, and the fields are repeated per instruction by the flags, but the video is not 60i. It doesn't pull a 24p stream out of 60i video.

Not every player can play the 24p file, though. Progressive-scan players can if playing to a progressive screen. Interlace-only players will insert the pulldown no matter the screen.

 

[RGBaker]

Thanks for the clarification.

GB

 

[bruceallen]

Hey Ryan

What's the destination?
1. 30p internet / DVD / BluRay
2. 60i DVD / BluRay / Broadcast

What's the client's demands?
1. Client that doesn't care about broadcast standards...
2. Client that does care?

What's the content?
1. Easy to Twixtor
2. Hard to Twixtor

Because depending on whether it is 30p or 60i final format... the answers are very different.

60i is easy-ish - just add 3:2 to the 24p stuff.

30p is much harder. You're going to have to do some kind of frame blending / twixtoring and it may or may not suck depending on the content.

I have personally worked on Twixtor shots that lasted 4-5 seconds but took many days to manually get perfect. It is by no means a panacea.

Bruce Allen
www.boacinema.com