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deinterlacing in compressor
When I deinterlace my footage with compressor the text looks pixelated what can I do to change that ? When I don’t deinterlace the text looks just fine.
DREW
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15 Replies
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[Andrew Kennedy] “When I deinterlace my footage with compressor the text looks pixelated what can I do to change that ? When I don’t deinterlace the text looks just fine. “
Andrew,
This is a very precise business, and we want to help, but we can’t help unless people help us to help by providing precise information. You’ve told us you’re trying to deinterlace footage, but you didn’t specify the codec involved. And, more importantly, you didn’t mention why you were deinterlacing. What’s your final destination? Are you deinterlacing for the big screen, i.e. a filmout? Are you deinterlacing for the small screen, i.e. a Web video? Come on, help us to help to help you…
David Roth Weiss
Director/Editor
David Weiss Productions, Inc.
Los AngelesPOST-PRODUCTION WITHOUT THE USUAL INSANITY ™
A forum host of Creative COW’s Apple Final Cut Pro, Business & Marketing, and Indie Film & Documentary forums.
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de-interlacing in Compressor is a simple one-stop-shop for de-interlacing.
you are using ONE setting only for your entire project.
in my experience you need to use different de-interlace settings for different sorts of motion,
and for text.that’s why i de-interlace in my FCP timeline.
in general, i prefer to NEST my master sequences
and use the Nattress “Smart De-Interlace”
this is the best within-FCP de-interlacing filter there is, IMO.applying it to a nest will de-interlace any motion effects and transitions.
i’m particularly sensitive to interlaced / progressive images, and if i see a move that’s 50i when the image is 25p, it jars. (i’m using PAL figures, cos that’s where i’m from)HOWEVER, as a side note, i did notice in the BBC specs that they, for one, don’t want the mofx and transitions de-interlaced – they want them interlaced,
as they do any title roll, or crawl,
so take my nesting advice with a grain of salt.after rendering my nest, i’ll blade out any sections that need particular de-interlacing attention.
i’ll often add a Too-Much-To-Soon “Blend” filter to the text elements (within the nest),
or the FCP “Flicker” filter set to max.
if you’re not nesting, this is still a good idea.
it makes the text look nice and solid.nick
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[Nick Meyers] “applying it to a nest will de-interlace any motion effects and transitions.
i’m particularly sensitive to interlaced / progressive images, and if i see a move that’s 50i when the image is 25p, it jars. (i’m using PAL figures, cos that’s where i’m from)HOWEVER, as a side note, i did notice in the BBC specs that they, for one, don’t want the mofx and transitions de-interlaced – they want them interlaced, “
I understand the opposite.
For me it doesn’t make sense to render something in Interlaced to be de-interlaced after.
IMO the way is to de-interlace the footage and render Progressive.
This is what the BBC want’s.
Transitions and many effects will be ‘destroyed’ when de-interlaced.
Cheers,
rafael -
thanks for the reply, Rafael.
the guy doing our grade convinced me (by showing me examples) that setting his timeline to fields = NONE the results were not as good as De-interlacing.
this was with text, in particular, in mind.
it could be that i was misled.but simply working in a Progressive timeline wouldn’t get the best out of interlaced footage, i’d reckon.
or am i missing something?regarding the BBC requirements, again i could be wrong.
i was referring to this passage:
“All delivered high definition master tapes must be 1080i25 (whether acquired
1080p25 or 1080i25). Rollers and moving captions must be added in
1080i25 to prevent unacceptable judder.”but that is from a document which could be out of date:
“HD: Summary of Delivery Formats”
<https://www.bbc.co.uk/guidelines/dq/contents/television.shtml#HD%20delivery%20summary>or maybe i just read the wrong doc.
there are a lot of them!cheers,
nick -
How can you guys advise anyone on deinterlacing when you have no idea what the heck the goal of deinterlacing really is?
David Roth Weiss
Director/Editor
David Weiss Productions, Inc.
Los AngelesPOST-PRODUCTION WITHOUT THE USUAL INSANITY ™
A forum host of Creative COW’s Apple Final Cut Pro, Business & Marketing, and Indie Film & Documentary forums.
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ha!
ok, david, so what really is the goal?most often in my reality, the goal is to change (PAL) video’s 50 images a second to 25.
pretty sure i said every thing else i had to say on that in the first post.after that it’s a matter of how you go about it.
cheers,
nick -
Now I’m really confused Nick, because the thread was initiated by Andrew Kennedy.
David Roth Weiss
Director/Editor
David Weiss Productions, Inc.
Los AngelesPOST-PRODUCTION WITHOUT THE USUAL INSANITY ™
A forum host of Creative COW’s Apple Final Cut Pro, Business & Marketing, and Indie Film & Documentary forums.
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[Nick Meyers] “the guy doing our grade convinced me (by showing me examples) that setting his timeline to fields = NONE the results were not as good as De-interlacing. “
Both things must go together.
If you de-interlace but you don’t set the time-line NONE, the footage is converted to Progressive, but will be rendered as Interlaced. Filters, motion effects and transitions will be applied different to the odd and even lines.
If you set the time-line NONE but you do not de-interlace, the interlaced footage will be rendered Progressive. your progressive frames will keep all the interlacing artifacts/combs.
In both cases you are in troubles.
rafael[Nick Meyers] “regarding the BBC requirements, again i could be wrong.
i was referring to this passage:
“All delivered high definition master tapes must be 1080i25 (whether acquired
1080p25 or 1080i25). Rollers and moving captions must be added in
1080i25 to prevent unacceptable judder.” “
Progressive material can be recorded on tape as Interlaced (fp). Instead of being recorded sequentially (1,2,3,4,5..), is recorded “fractionated”. First are recorded the odd lines (1,3,5,..) then the even lines (2,4,6,..) or vice-versa. On play the image is read in the proper order: 1,2,3,4,5,..
Dear David, there are no many different Interlacing scenes. Or you hand it properly, or..
Cheers,
rafael -
“Both things must go together. ”
yes. thats why i nested the sequence and de-interlaced the nest.
it gives me a lot of control.
if for some reason i wanted a section of the film to have an “interlaced look”,
i can control that.FWIW, i HAVE done that in a show!
but it’s rare and in the future i’ll try a NONE sequencein the end, my goal is that i want to see 25 discrete images a second, NOT 50.
whether that’s recorded to, or playing off, an interlaced tape format or not doesn’t really bother me.all the best,
nick -
Nick
really appreciate your advice about making text look firmer, really useful thanks
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