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StainlessS · 26th April 2021, 11:56

You should use eg AssumeTFF() if necessary, as AssumeBFF() is the default.
Almost always TFF in PAL land, when interlaced, if PAL BFF interlaced, then problably done in error.

If cropped off part contains valid image, then may be useful to crop later and so
have a bit more image to use during deinterlace, however I would mostly crop first.
I'm not saying that Mounir is wrong, but perhaps he/she can give a reason for crop last.

EDIT: As your crop is left only (not top nor bottom) I dont see it making much difference,
although if crop first, then must comply with vertictal interlaced cropping restrictions due to
colorspace (chroma granularity) and interlacing. [ie multiples of 4 where interlaced YV12]
If cropping first makes you lose some image due to crop restrictions on interlaced,
might then be better to crop last. (So I would say not a concrete rule either way).

26th April 2021, 11:56	#6 \| Link
StainlessS HeartlessS Usurer Join Date: Dec 2009 Location: Over the rainbow Posts: 10,980	You should use eg AssumeTFF() if necessary, as AssumeBFF() is the default. Almost always TFF in PAL land, when interlaced, if PAL BFF interlaced, then problably done in error. If cropped off part contains valid image, then may be useful to crop later and so have a bit more image to use during deinterlace, however I would mostly crop first. I'm not saying that Mounir is wrong, but perhaps he/she can give a reason for crop last. EDIT: As your crop is left only (not top nor bottom) I dont see it making much difference, although if crop first, then must comply with vertictal interlaced cropping restrictions due to colorspace (chroma granularity) and interlacing. [ie multiples of 4 where interlaced YV12] If cropping first makes you lose some image due to crop restrictions on interlaced, might then be better to crop last. (So I would say not a concrete rule either way). __________________ I sometimes post sober. StainlessS@MediaFire ::: AND/OR ::: StainlessS@SendSpace "Some infinities are bigger than other infinities", but how many of them are infinitely bigger ??? Last edited by StainlessS; 26th April 2021 at 12:15.