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#16 |
Inner Circle
Join Date: Sep 2004
Location: Sacramento, CA
Posts: 2,488
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Not only that, but having 1920x1080 pixels on the sensors in the EX1 will offer four times the amount of data to start from compared to the HVX200 with 960x540 sensors. The EX1 will record as many color samples per frame as the HVX200 has pixels on its sensors, so it should be at least similar for green-screen work. If you want to compare the EX1 to more expensive HD cameras with similar sensors and 4:2:2 recording that might be a different story, but for the price the EX1 should be a fine tool relative to any competing alternatives.
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#17 |
Regular Crew
Join Date: Jun 2005
Location: Scotland
Posts: 54
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Optical drives to date do not use SATA connections !
Quote Evan Donn "Also, my 3 year old G5 has SATA - Apple hasn't used IDE for several years so your Blu-ray drive should work just fine. It sounds like you don't just need to find a new guru, you need to throw out everything yours has been telling you and start over with your research."
Evan the SATA connections are for the hard drives, the Pioneer BDR-202BK uses SATA connections this won't fit any Mac optical drive bay ATA connector that I know. I have just found out that there is no HD workflow in DVD Studio 4 for HD video as yet and Toast will only allow you to produce a DATA disc onto Blue Ray. To clear things up I am not comparing a Sony EX 4.2.0 against Panasonics 4.2.2 I am only stating a fact about 4.2.2 in general...that it is at the price range of the HVX200 better for green screen and yes I have not worked with XDCAM which I assume has 4.2.0 and may work just as well. |
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#18 | ||
Major Player
Join Date: Feb 2006
Location: Philadelphia
Posts: 795
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Quote:
http://developer.apple.com/documenta...0906_arch.html Quote:
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#19 | |
Barry Wan Kenobi
Join Date: Jul 2003
Location: North Carolina
Posts: 3,863
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Quote:
XDCAM EX, at 1920x1080, has a color resolution of 960x540 (518,400). DVCPRO-HD 25p/50i, at 1440x1080, has a color resolution of 720x1080 (777,600). DVCPRO-HD 30p/60i, at 1280x1080 has a color resolution of 640x1080 (691,200). In either case, the DVCPRO-HD color sampling is significantly more. But if considering interlaced footage (which, frankly, nobody ever should) ;) then it becomes far more complex because interlaced 4:2:0 chroma is not a straightforward proposition at all. Besides, all the math and measuring can go away once we get someone like Jim Arthurs to put both units side by side and deliver actual, final images rather than posturing based on mathematics which may or may not yield discernable results in the final images. |
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#20 | |
Major Player
Join Date: Jul 2002
Location: Juneau, AK
Posts: 814
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Quote:
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#21 | |
Inner Circle
Join Date: Sep 2004
Location: Sacramento, CA
Posts: 2,488
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Quote:
But then since DVCProHD is an I-frame codec and XDCAM EX isn't, some of the EX color advantage could be lost for subjects with a lot of motion, which of course is one of the drawbacks of a GOP-based codec. I've also heard a rumor that the internal video processing on the EX1 may be less advanced than some other inexpensive HD cameras, so if true that would be another leveling factor. But any way you look at it the EX1 should be a fine camera compared to anything else in its price range, and we'll probably have to look long and hard to find situations where the footage it produces isn't satisfying. We'll know in a few more weeks... |
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#22 |
Regular Crew
Join Date: Jun 2005
Location: Scotland
Posts: 54
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Thanks Evan
Thats good news about the 2 spare SATA ports... so we only need Apple to give us an HD workflow out of DVD Studio Pro 4 and we are laughing.
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#23 | |
Major Player
Join Date: Feb 2006
Location: Philadelphia
Posts: 795
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Quote:
The HVX uses pixel shift though, correct? In that case it's not purely interpolated info, but it's true you are starting with a lot less information in all three channels. In any case, if you're currently happy keying SD DVCPro 50 material then I stand by my argument that there's no reason to dismiss XDCAM because of it's 4:2:0 color space - I just double-checked my math on that comparison and the number still stands at 3X the pixels in the chrominance channels, not to mention 6X the pixels in the luminance channel - we're talking about a huge difference simply due to the jump to HD. The fact is that just about any of the current HD formats store enough info in each channel to equal or exceed 4:4:4 SD. The comparison between DCProHD and XDCAM is not as cut and dried - you trade luminance res with one for chrominance res on the other, but the total numbers are much closer and my guess is both will perform about equally well when it comes down to real world use. For me the biggest stand out feature of this camera is the combination of a 1/2" imaging system and a handicam form factor - there simply are no other cameras on the market that combine both of these, so I currently don't see any competition for this camera... but that's just me. Some see the small form factor as a negative but I prefer it - I can't stand big cameras.
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#24 | |
Inner Circle
Join Date: Jan 2006
Posts: 2,699
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Quote:
But go to progressive formats and that all goes away. Then 4:2:0 becomes a much more logical choice. (Assuming 4:4:4 is out of the question!) |
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#25 | |
Trustee
Join Date: Mar 2004
Location: Milwaukee, WI
Posts: 1,719
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Quote:
If George were to take any form of 4:2:0 HD and down convert in software he would end up with something even better then 4:2:2 SD. In fact I sometimes capture HDV tapes as uncompressed SD by letting the camera down convert through component. This doesn't look as good as software down conversion but it is super fast and easy and pretty darn close to a perfect 4:2:2 SD. |
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#26 |
Wrangler
Join Date: Dec 2002
Location: Mays Landing, NJ
Posts: 11,790
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