On 12/27/2020 07:30 AM, Carl Eugen Hoyos wrote:
Am 27.12.2020 um 12:19 schrieb Paul B Mahol <one...@gmail.com>:
Do you know exact telecine pattern used in your samples?
I don’t think the sample is telecined...
It must have been. Now, bear with me.
1, The original video was p24:
[A/a][B/b][C/c][D/d]
2, Later, it was telecined:
[A/a][B/b][B/c][C/d][D/d]
3, Later, a modulo-5 frame was dropped [1]:
[A/a][B/c][C/d][D/d]
4, Later, a modulo-4 frame was repeated:
[A/a][B/c][C/d][D/d][D/d]
[1] Dropping a frame in lieu of detelecine was a mistake. Perhaps the engineer
was drunk.
... or at least whatever was done with it can’t be undone (even the description
confirms this)...
Ah! But it can be undone (sort of):
Decimate to:
[A/a][B/c][C/d][D/d]
Then synthesize a frame:
[A/a][B/B][B/c][C/d][D/d]
Then detelecine:
[A/a][B/B][C/c][D/d]
... so this part of the discussion seems moot.
I agree. It's moot because it doesn't bear on why decimate=ppsrc=1 isn't
working correctly.
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