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Old 16th November 2019, 21:18   #21  |  Link
VictorLS
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Originally Posted by Cary Knoop View Post
50i (or 25i if you prefer this semantic)!
I'm not professional but I'm sure not 50i but i50=25i on my own.
May be someone know place where shader-writers are to ask them about writing HLG->BT.709 shader there?
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Old 16th November 2019, 21:59   #22  |  Link
Cary Knoop
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Originally Posted by VictorLS View Post
I'm not professional but I'm sure not 50i but i50=25i on my own.
It's semantics it refers to the same thing. 50 fields per second or 25 frames per second. Personally I prefer the 50i terminology because 2 fields do not actually make a visual frame!
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Old 16th November 2019, 23:27   #23  |  Link
VictorLS
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Originally Posted by Cary Knoop View Post
It's semantics it refers to the same thing. 50 fields per second or 25 frames per second.
I knew that but I'm about place of letter i (before or after number) is important: 25i means 25 full-height frames are get from 50 interlaced (half-height i50) frames.
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Originally Posted by Cary Knoop View Post
2 fields do not actually make a visual frame!
Commonly you're right but in case of static it's equal.
Btw high quality double framerate deinterlacers (i.e. Yadif) gives enough video quality for not too fast moving to say i50=p50=50p - in case of progressive video place of p doesn't important.
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