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DV NTSC 4:1:1 to 4:2:0 color sampling

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Travis Dao
DV NTSC 4:1:1 to 4:2:0 color sampling
on Apr 28, 2005 at 8:54:06 pm

Hi all,

I encode a lot of DV NTSC video for the web. I've been told that the best way to improve DV NTSC color sampling (4:1:1) for the web (4:2:0) is to render it using a (4:2:2) codec like MotionJPEG and DV50. I use Premiere Pro 1.5 and Final Cut Pro to capture, is there a way to change the color sampling of DV NTSC upon capturing? Or is there a compression software that will adjust the color sampling before encoding?

Thanks,
Travis


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charles simonson
Re: DV NTSC 4:1:1 to 4:2:0 color sampling
on May 2, 2005 at 3:02:18 pm

The preprocessing and color adjusting done by apps like Compression Master and ProCoder is very good. So good, that for web video output, I wouldn't worry too much about it.


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Ben Waggoner
Re: DV NTSC 4:1:1 to 4:2:0 color sampling
on May 2, 2005 at 11:24:49 pm

And rerendering from 4:1:1 to 4:2:0 doesn't help. What does help is to render from an NLE as 4:2:2 when using 4:1:1 source, so all effects, motion graphics, titles, etcetera get rendered as full resolution.

DV25 should only be treated as an acquisition format, not a post format.



My Book: http://www.benwaggoner.com/books.htm
Squeeze and ProCoder tutorials: http://www.classondemand.net/benwaggoner/
Compression Class at Stanford: http://www.digitalmediaacademy.org/compression.html


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