Keith Pratt
Forum Replies Created
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Thanks. I’ll keep an eye out.
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Whilst the bigger not always being better maxim is true, the point about uprezzing is not analogous. Upscaling is fundamentally changing the image, and in choosing an editing codec that’s exactly what you’re trying to avoid. If it wasn’t for the file size we’d all be editing uncompressed.
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“People keeps saying that Prores HQ should be used only for 2K up, but nobody gives a reason.”
I’ve seen this a lot on this forum and occasionally elsewhere. I think it might stem from people misinterpreting Gary Adcock’s PVC article on ProRes, then passing that misinterpretation on as fact.
In the article Gary suggests only using HQ for “2K” material, which makes it sound like a resolution issue, when if fact what he means is 10-bit material. Some also seem to have taken his claim that SQ “ran better” to mean transcodes to SQ were better, when what he actually meant is that playback ran better.
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“And what is the relation of all that with the size of the picture?
Why HQ only for 2K up?”It has nothing to do with frame size.
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Put this into a scientific calculator: 23.976×100.1%.
Looking at the answer it gives you, why would the speed-up ever be 100.01%?
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Is the field dominance correct all the way through your workflow? Have you tried an earlier version of Streamclip?
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You’ve got your understanding of “frame blending” the wrong way round.
Interlaced signals are a foreign language to computer, so when they display interlaced material they show both fields at once. Where you’d see 59.94 fields on a TV, you see 29.97 full frames on a computer monitor.
Most software designed for viewing media will have an option to de-interlace, and frame blending is a specific type of this. The reason you don’t see the interlacing in DVD Player is because its default setting is to de-interlace (though probably not using the frame blending method, incidentally).
To get a handle on the different types of de-interlacing, open the file you don’t like the look of in VLC, click Video, followed by De-interlace, and try Blend, then Bob, then Discard and finally Disable.
But all of that is actually a side-point. Your footage looks just as it should in Streamclip. Just ignore how it looks whilst you edit, and when you burn it back to DVD and watch on a TV, it’ll look just as it should.
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I e-mailed info@borisfx.com.
My question was whether the way DVFixer worked meant it would only be useful for smoothing blockiness that comes as a result of chroma subsampling or if it would also work (to some extent) for footage that had aliasing as an artifact of bad scaling.
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Without having the slightest clue how DV Fixer achieves what it does, I wondered if it might work (even a little bit), despite the differing reasons for the aliasing. I sent Boris an quick e-mail about it a week ago but haven’t had a response.
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I agree that most people wouldn’t notice it, but it’d bug the hell out of me. I’m sure I’ll fight it for a while and then admit defeat.
Has anyone tried Boris DV Fixer on VDSLR footage? I’m thinking the following might yield results I can live with: try to keep focus on the soft side when shooting, ingest at 1080, run DV Fixer, then downscale to 720p.