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Thanks for all the responses; I didn't want to start any DV vs MPEG-2 argument. :)
I may consider a ATI TV Wonder due to the relatively cheap price. I actually have a spare PCI-E slot, and have noticed the HD600/650 are available as PCI-E. The spec sheet mentions 'Hardware MPEG-2' capture, only on the 650's. What is that all about? Thanks for all the suggestions. Any suggestions for a cheap TBC? |
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^ Are you wanting to stabilize horizontally or vertically?
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4:2:0 doesn't mean one of the chroma channels is discarded. If you threw out Cb or Cr, you would be left with red-tinted or blue-tinted video. The scaling is applied equally to both channels regardless of which subsampling scheme you use. With 4:2:0 you get 1/2 horizontal and 1/2 vertical. With 4:1:1 you get 1/4 horizontal and full vertical, which means you shouldn't have to worry about scaling interlaced chroma differently than progressive. 4:1:1 is considered equivalent/superior to Betacam SP's chroma resolution, so it sure as hell exceeds the pitiful color of (S-)VHS. More fun comparing pro formats here. If you're going to DVD from 4:1:1 you end up with the worst of both systems: 1/4 horizontal and 1/2 vertical (the equivalent of 4:1:0 I guess, but stored as 4:2:0). It's all academic because VHS color is low-res and noisy. If you take a look at my examples, the artifacts caused by an intermediate conversion to RGB have far higher resolution -- and those are invisible. I was surprised to find that 4:2:0 is insufficient for highly-saturated color transitions captured from LaserDisc, though. I think 4:1:1 would smear the color bars horizontally but I haven't tested that yet. |
It's still hard to type, but a conversation like this almost begs/screams for my input! I can't sit on the sidelines for this one...
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I don't really think Betacam SX or MPEG IPX are anything other than aborted formats, to an extent. It's just something you read about on Wikipedia more than anything else. MPEG is not a good shooting format anymore than DV is a good conversion/intermediary format. PAL and NTSC both need to be as close to 4:4:4 as possible. Due to the color method, 4:2:2 is just as good, and a close approximation to the analog signals. 4:2:0 is next best. Bringing up the rear is 4:1:1, which just really smears the color on anything converted with that format (i.e., not shot). Maybe if you converted 4:4:4 to DV, it would be okay, but converting 4:2:2 is dreadful. Real life -- aka shooting -- is like converting 4:4:4, and that's why it's fine. 4:2:2 converts far better to 4:2:0 than it does 4:1:1. Do note that some DV codecs suck, as there's not a single way to decode it. Nothing was ever standardized, as it was too short-lived. This site is far from the only ones that suggests lossless AVI (uncompresses AVI), or to a lesser extent, MPEG, and not DV, for converting analog video (especially VHS sources).
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I'd not really anti-DV, but there are limitations that you/anybody should be made aware of before going down that path. For some, DV is the only option. For other, there are really better choices to be made. But regardless, you should know everything first -- not just read the propaganda put out their by Canopus. (Note that since Grass Valley bought out Canopus, much of the BS is gone. But the old Canopus info still lingers online, and with its users.) Do not buy a 650 card. It has uncorrectable AGC issues. Get the 600 card. Preferably, get the ATI 600 USB card, perhaps not the internal PCI card. Gosh -- this took me forever to write. :mad4: |
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I always neglect to include that in my posts. Unless you plan to watch DV as DV -- which is pretty much impossible -- double converting is really where the issue lies. The end format is always going to be DVD, Blu-ray, H.264 streams, etc. However, I would note that even analog source 4:2:2 has issues converting well to 4:1:1. It's probably not so much the issue with DV (in theory) but with the converter boxes/cams themselves, and/or the codecs. I can always tell when something was DV converted, because the colors are cooked (IRE and gamma off), because the color detail is lacking, and because there are often artifacts in the chroma. Not to go too far off topic, but this is a good read: http://www.dvxuser.com/V6/showthread...-2-0-and-4-1-1 It's rare that somebody prefers 4:1:1 (for conversion or shooting -- but especially conversion). Getting back to the original topic is important. Let's not overlook/forget the OP. ;) |
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It seems to me that the 4:1:1 color space itself is superior to 4:2:0 for storing old home video formats. It's a shame that the hardware to capture to it apparently sucks and the hardware to play it back is nonexistent. It would be nice if MPEG had offered it as an alternative for 1/4 color storage.
Do you have any experience with the ATI HD 750 PCIe card to check for the AGC issue? I know there are complaints about the USB stick, but that's apparently different hardware (no 3D comb filter). I've been evaluating inexpensive USB sticks and I prefer the Diamond VC500 to the ATI 600. It doesn't have the issue that was recently pointed out of the 600 filtering S-Video chroma bandwidth, and at least with my DVD player it seems to get the levels closer to the original file. |
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Review with sample footage: |
No, MPEG is the worst capture codec both with hardware and software. I've done several of my own tests over the past ten years, and MPEG I always find has crushed blacks, even when I've lowered the black levels, and it has multi-generational issues very similar to S-VHS. Plus I can always tell when stuff has been captured via MPEG because the color smears when played back by anything but composite. I've seen a number of DVD's made by my competitors here in the Ottawa area, and the vast majority of time,e ven on playback via composite, the Colors are smeared (and a number of them hav come from set-top DVD players as the menus can attest).
I've even run these DVD's through the ADVC-300 (besides VHS) and I've achieved results that are equal to or close enough to look like Betacam SP. DV is the superior of the two codecs. I'm not arguing that uncompressed is the ultimate way to transfer, but MPEG is garbage. I worked at an independent production studio years ago, and we would occasionally get footage in in MPEG, and we would always hate working with it, since even using Handbrake and Fnal Cut Pro, the footage never looked as good as the stuff we were shooting in DV/DVCPRO (at first we used DV then went to DVCPRO), and even when it broadcast it looked even worse. But that's not surprising with MPEG's 10:1 compression ratio vs DV's 5:1. DV is the superior format. |
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Then you have never seen high def. captured mpeg, quality is very good. |
Tom is wrong - and every expert on the forum seems to concur
back to the OP: all in wonder cards for PCI-E using XP are the x600 x800 x1300 x1800 and x1900 if you are using 7 use an ATI600USB troll ebay for cheap TBC's i scored a Datavideo TBC-100 PCI card recently for $70 and free shipping the TBC-1000 and AVT-8710 are recommended i have had a For.a FA-125 and a Keywest BVTBC-10 and thought they where pretty good units too. dont mess with any of the old big rackmount TBC's |
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And I'm no hobbyist. My work has been seen all across Canada, the US and Europe. I am a professional. Quote:
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Personally I prefer the Premiere Pro line (although I can use any editing system), and I even asked Adobe why I couldn't get decent quality MPEG transfers (and I even tried reinstalling the MPEG codec for PPro). Adobe told me that I needed to remove the MPEG compression completely, otherwise the MPEG codec is so compressed at it's base that it is not good for capturing (and the only way was to either capture it uncompressed digitally or send it out via analog). Adobe suggested that I use a hardware codec (not a software codec), such as the ADVC-300. I used it and I was impressed at the quality that it offered over the software codecs. And I have seen High-Definition MPEG, and it is good, but we are talking Standard Definition here. For Standard Definition MPEG is garbage. Quote:
I found this interesting article written by Adam Wilt online regarding 4:1:1 and 4:2:0: Quote:
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i feel very sorry for your customers who obviously cant tell the quality they are missing out on.
anyone using 4:1:1 DV to capture customer videotapes is not a pro you cant make chicken salad out of chicken **** :wall2: this thread should just be locked - OPs questions have been answered - i sincerely hope decided against DV |
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This may be one argument where as Professionals we must agree to disagree, because I know that I am an expert and Professional and I only offer High Quality Professional Transfers, and I agree with Adam Wilt there about interlace sources already suffering from a loss of vertical resolution quality due to the nature of interlace and I find that 4:2:0 just adds to that loss, not to mention that the MPEG generational loss does not help; so why add to that loss with 4:2:0 just to recompress it again for DVD? In this case it might be wiser to suggest to the OP that he try both and decide for himself. |
i apologize - that was a pretty obnoxious post.
i guess if i was paying a pro service i would want them to be capturing lossless. the OP is capturing PAL. does the canpous device capture PAL sources as NTSC 4:1:1 DV or PAL 4:2:0 DV? because if it is PAL DV this entire argument was pretty moot |
The ADVC's capture PAL DV 4:2:0.
But even for NTSC I would still go with DV. |
Disagreements are fine -- but behave.:buttkick:
I had to rename the post title to include MPEG vs DV. It is a pretty good discussion, although it did derail the thread some. The OP is free to open another thread for more questions. Thanks for keeping it professional. :) |
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