[Owen Smithyman]

Hey all,

Thought I’d give a little more info about conversions and how SheerVideo plays into this issue.

Right, so DVCPro HD is a lossy codec, and it does several things in which it discards information. First, it reduces the horizontal luma resolution from 1920 to 1440 or from 1280 to 960. It also reduces the horizontal chroma precision from 960 to 408 or from 640 to 480, reduces the precision from 10 to 8 bits per component, discards additional image information as necessary in order to maintain a fixed data rate of 100 Mb/s, and introduces different artifacts than ProRes HQ.

Animation is limited to 8 bits per component; clips all highlights, subblacks, and other out-of-gamut colors as it converts from video range to full range; and makes huge files as it compresses real-world video barely if at all with its run-length encoding.

Sheer Y’CbCr 10bv 4:2:2 is lossless, preserves the full resolution, preserves the full component precision, preserves the full data range, and encodes real-world footage more than twice as efficiently as Animation. If 8 bits per component is enough, use Sheer Y’CbCr 8bv 4:2:2 instead.

Cheers,

Owen Smithyman
Technical Associate
BitJazz, Inc.
https://www.bitjazz.com

[Owen Smithyman]

Hello all,

I’m with SheerVideo tech support, and I’d like to say to anyone who has any questions at all about SheerVideo: if you can’t find all the answers you need by searching through forums, by all means please email us at BitJazz!

For informational questions: info [at] bitjazz.com
For customer service: service [at] bitjazz.com

We’ll be happy to answer any questions you may have, so please don’t hesitate to contact us.

I’d also like to do a little plugging: SheerVideo is 1/2 price from now until the end of NAB!

Cheers,

Owen Smithyman
Technical Associate
BitJazz, Inc.
https://www.bitjazz.com