Does anyone have opinions on the "best", or industry standard pulldown schemes for the following film frame rate conversions to video?
1) 16 fps film to PAL video
2) 18 fps film to PAL video
Any suggestions would be helpful.
- digvid
Pulldown Patterns
Moderator: Andreas Wideroe
Pulldown patterns.
If you have the ordinary 3-bladed shutter on your projector, it has to run at exactly 16 2/3 frames pr. second to avoid any flicker when transferring to PAL. PAL "runs" at 25 frames pr. second, or more correctly 50 half-frames, locked to the 50 cycles pr. second electrical system. (US-system is 60 cycles pr. second).
If it runs faster or slower, there will be some flickering.
If it runs faster or slower, there will be some flickering.
-
digvid
Patterns
What about specific pulldown patterns? For instance, for 24 fps film to NTSC video I could do one of the following:
Repeat whole frames to convert every 4 film frames to 5 video frames...
1 1 2 3 4, etc.
or, for a smoother pulldown, I could combine fields from adjacent frames like this...
1 2 3 4 4/5 5 6 7 8 8/9 9, etc.
So, are there common schemes such as this in use for converting 16 fps and 18 fps film to PAL video?
- digvid
Repeat whole frames to convert every 4 film frames to 5 video frames...
1 1 2 3 4, etc.
or, for a smoother pulldown, I could combine fields from adjacent frames like this...
1 2 3 4 4/5 5 6 7 8 8/9 9, etc.
So, are there common schemes such as this in use for converting 16 fps and 18 fps film to PAL video?
- digvid