2:3 Pulldown and 3:2 Pulldown in bbMPEG?

[puertorican138]

What's the difference between 2:3 Pulldown and 3:2 Pulldown . In TMPGEnc, I encode my SVCD's with 3:2 Pulldown that have a 23.976 frame-rate. When I go to multiplex them in bbMPEG, it always sets it to 2:3 Pulldown instead of 3:2 Pulldown. Is this supposed to happen? :P

[easydvd]

I thought that the difference between the two was PAL or NTSC, but don't take this as certain......

[puertorican138]

I thought that the difference between the two was PAL or NTSC, but don't take this as certain......

easydvd, I don't think PAL uses pulldown, only NTSC. But, what's the difference in bbMPEG between the two. In TMPGEnc, when I'm encoding to 23.976fps, it's encode mode is "3:2 pulldown when playback". Why is bbMPEG setting it to 2:3 pulldown instead of 3:2 pulldown?

[Epi]

Don't get confused it's not what you think,

2:3 = taking two frames and outputting three only used when the file is being MULTIPLEXING, don't worry its still progressive.

3:2 = when CREATING a file and taking three frames and the encoder will actually put out two.

If this is not clear enough let me know.

-Epi

[Cornucopia]

Those terms can mean a number of things:

To some 3:2 and 2:3 can mean the same thing--the Telecine method for converting 24 film frames/second into 60 NTSCvideo fields/second. The difference comes in deciding which frame starts the sequence. Could be 3:2:3:2:3:2:3:2 or 2:3:2:3:2:3:2:3.

To others, the terms might be complementary. Where 3:2 might be the Telecine stage, and 2:3 might be the Inverse Telecine stage (60 NTSCvideo fields/second into 24 film frames/second). IVTC comes into play during encoding to MPEG. If it's MPEG2, then the terms could refer to the progressive/interlace flag.

You wanna be real clear, cuz some programs go by one usage for the terms, others go by the 2nd.

Oh, and PAL can do a type of telecine--it's called 2:2. And the use of the term "Pulldown" might best be reserved for what happens to the audio of a film that is being edited using a video reference. E.g.: Audio sampled at 44100Hz becomes 43658 during editing. Its inverse is "Pullup", which will make it 44100 again for final mastering.

I deal with this stuff alot, and occasionally I get confused, so I know it's trouble for those Nubees on this site.

Happy encoding!

Scott