Combining PAL & NTSC prints for perfect theatre authenticity?

[cafevincent]

Question 1:
Can I change PAL DVD's framerate to ~24fps (correct speed)?

Question 2:
Can I replace the soundtrack in it with a soundtrack from NTSC DVD (correct speed)?

This would (in theory) create a perfectly theatre-like transfer -- meaning 24 frames per second and no ghost frames (no stuttering) without the 4% speed gain from PAL format. Can it be done?

[oddyseus]

u cant author such a video (24fps) most authoring progs would reject it. However u can use WinDVD 6 and instruct it to play PAL sources at their correct speed. It would automatically slow them down to 24 fps for you.

[hendrix]

Originally posted by oddyseus
u cant author such a video (24fps) most authoring progs would reject it. However u can use WinDVD 6 and instruct it to play PAL sources at their correct speed. It would automatically slow them down to 24 fps for you.
true - you can however slow PAL to 23.976 fps then add 2:3 pulldown

[cafevincent]

Originally posted by oddyseus
u cant author such a video (24fps) most authoring progs would reject it.

I know most would reject it but I'm trying to find out the ones that doesn't.

Originally posted by oddyseus
However u can use WinDVD 6 and instruct it to play PAL sources at their correct speed. It would automatically slow them down to 24 fps for you.

Tried that, didn't get any sound on my S/PDIF out. Best way would be to use NTSC soundtrack with it.

[hendrix]

Originally posted by oddyseus
u cant author such a video (24fps) most authoring progs would reject it.


Originally posted by cafevincent
I know most would reject it but I'm trying to find out the ones that doesn't.

you wont - all DVD authoring programs require NTSC to be 29.97fps and PAL to be 25fps. you'll have to add 2:3 pulldown to a progressive mpeg2 file beforehand.

so in your case you'll need to go 25fps slow it down to 23.976fps then add 2:3 pulldown.

there are some authoring programs that add 2:3 pulldown automatically for you so you dont have to it manually (i.e. DVD Architect, Adobe Encore)

[cafevincent]

So authoring is not the answer
Is there any other way?

[hendrix]

Originally posted by cafevincent
So authoring is not the answer
Is there any other way?
actually you can author your video...,

what im saying is NO authoring program will accept pure 24p (23.976fps) video files - you just have to add 2:3 pulldown flags to them so standard TVs can display them.

[cafevincent]

I'm trying to preserve the quality, that's why no 2:3 pulldown and ghost frames for me please.

[hendrix]

Originally posted by cafevincent
I'm trying to preserve the quality, that's why no 2:3 pulldown and ghost frames for me please.
performing 3:2 pulldown wont give you ghosting frames de-interlacing will...plus you have to add the pulldown flag in order for the DVD Authoring programs to accept the file...adding pulldown flags are just flags...your files will still be 23.976fps - the pulldown flags tell the player how to display the DVD - if you have a progressive TV and a DVD player the flags are ignored

[cafevincent]

What does this pulldown do if framerate is still 23.976fps? I thought 2:3 pulldown puts blended frames between every 4 frames to create NTSC framerate. Anyway, I thought I should give it a try, what is the latest version of DVD Architect and what company developes it?

[hendrix]

Originally posted by cafevincent
What does this pulldown do if framerate is still 23.976fps? I thought 2:3 pulldown puts blended frames between every 4 frames to create NTSC framerate. Anyway, I thought I should give it a try, what is the latest version of DVD Architect and what company developes it?
for Film to Video - film is slowed down from 24fps to 23.976 - then 2:3 pulldown is added this is called Telecine - with pulldown frames aren't blended, extra frames are added to make the film 29.97fps for video...when you watch a film on video it's been pulldowned.

with DVD it's a little different but the concept is still the same: The film is still slowed to 23.976 fps but instead if physically adding pulldown youre adding pulldown "Flags" - the file is still 23.976 fps but if your player and TV isn't progressive ready then the flags adds the extra frames to 29.97fps...if your DVD player is progressive ready then the flags are ignored and it's played at 23.976fps.

all NTSC DVDs have the 3:2 pulldown flags

as for the blended frames - you're thinking of Deinterlacing, pulldown is different

just watch a commercial DVD and see for yourself - this is the exact same procedure

btw telecine performes a 2:3 pulldown but the term is still called 3:2 pulldown (a little confusing but the concept is the same)

the latest version of Sony DVD Architect is 2a(Build 121)