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April 3rd, 2005, 11:16 PM
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#1 |
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Trustee
Join Date: Aug 2003
Location: Vancouver BC Canada
Posts: 1,315
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Which type of YUV?
I understand that the Cineform .avi is YUV 4:2:2. Is it the YV12 like a DVD's mpeg2 or something else?
Thanks
__________________
Damnit Jim, I'm a film maker not a sysytems tech. |
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April 4th, 2005, 12:25 AM
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#2 |
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CTO, CineForm Inc.
Join Date: Jul 2003
Location: Cardiff-by-the-Sea, California
Posts: 8,095
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YUV 4:2:2 means the chroma resolution is half the horizontal res and the full vertical res (if luma is 1440x1080 chroma is 720x1080.) The FOUR-CC code is YUY2 or UYVY. The FOUR-CC code you gave YV12 is a 4:2:0 chroma sampling. 4:2:0 the chroma is halved in both directions -- so a 1440x1080 only has chroma res of 720x540. CineForm chose 4:2:2 so that it has twice the chroma res of either 4:1:1 (DV) or 4:2:0 (HDV) sources. 4:2:2 is also an old broadcast standard.
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David Newman -- web: www.gopro.com blog: cineform.blogspot.com -- twitter: twitter.com/David_Newman |
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April 4th, 2005, 11:30 PM
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#3 |
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Trustee
Join Date: Aug 2003
Location: Vancouver BC Canada
Posts: 1,315
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Thanks for the education. The whole YUV and its 1,000 versions are so confusing.
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Damnit Jim, I'm a film maker not a sysytems tech. |
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