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October 4th, 2007, 09:22 AM | #16 | |
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Avid Liquid has been a native mpeg editor for years. It "was" the first NLE to have native HDV or any type of mpeg2 editing. |
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October 4th, 2007, 04:37 PM | #17 |
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I'm not talking about the ability to edit HDV or XDCAM HD. I'm talking about the ability to edit it and then create a final edited file for output back to tape or disc without needing to recompress the footage. AFAIK Vegas is the only NLE out there that can currently do this. Though I'll put my hands up if I'm wrong.
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October 18th, 2007, 06:00 PM | #18 |
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Simon: Could you tell me how long the EX is?
It looks like it is nearly identical in size as the Z1 in these photos from: http://www.dvuser.co.uk/content.php?CID=171 But the specs say the EX is 2" shorter. Can you confirm any thing either way? Thanks Last edited by Chris Hurd; October 19th, 2007 at 12:43 AM. Reason: removed photos taken from other site |
October 18th, 2007, 10:29 PM | #19 |
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I like the looks of the EX. It has less of the HVX200 toaster shape. LOL
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October 18th, 2007, 11:41 PM | #20 | |
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-gb- |
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October 19th, 2007, 06:26 AM | #21 |
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I was under the impression that even cuts-only GOP mpeg had to have some recompression when layed out as unless you only ever cut on the I frames the GOP structure changes and needs to be "reassembled"... (which I would assume means recompressed)
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October 19th, 2007, 07:00 AM | #22 | |
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October 19th, 2007, 07:13 AM | #23 | |
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Data-wise an I frame is quite different to a P frame... So surely any edited sequence would actually need recompressing to create new I frames and P frames, as they don't work interchangeably.
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October 19th, 2007, 07:38 AM | #24 | |
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BTW, GOP length in XDCAM HD changes, not within a sequence, but based on frame rate. When shooting 24P, the GOP length is 12, as opposed to 15 in 30p or 60i. I just re-read the XDCAM Whitepaper for FCP. It states that if the sequence is a native XDCAM HD format, no re-compression is required. However, a couple pages later, it states that 'minor' re-compression may occur around edit points to ensure group of pictures and data rate meet MPEG2 compliancy. -gb- |
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October 19th, 2007, 08:20 AM | #25 | |
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October 21st, 2007, 05:34 AM | #26 | |
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I'm not sure how FCP works. I have only just started using that software so I don't know much about it. |
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October 21st, 2007, 06:04 AM | #27 |
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The demo of Vegas Pro 8 with EX1 footage in Sydney was pretty impressive. Yes if it's cuts only no recompression is required, obviously if there's dissolves or anything else that affects the image recompression is required but only of the affected portion.
FCP seemed to import the footage as easily as Vegas Pro 8 although the process didn't seem quite as fast. It seemed to loose the metadata in the process. Vegas by comparison gives it to you as markers on the T/L. You also get a basic burn to BD disk for quick previews. At the same event Edius seemed to cope quite capably, Avid Liquid seemed unable to ingest but will in the next release. They were able to playback the footage once ingested outside of Liquid. Adobe were invited but didn't show. |
October 21st, 2007, 06:15 AM | #28 |
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Thanks for the nice NLE's vs EX1 round-up, Bob. My question is: based on HDV renders, I'm getting exactly what you describe from Vegas Pro 8.0a: recompression of only substantially modified parts. However, what beats me is that when I play back the no-recompressed renders using Nero Showtime, I'm getting clean video only if the hardware accelleration is off, otherwise it seems the whole bottom 1/3 of the picture sort of gets frozen, then pixelated, from time to time - even outside the cut points of the project. Of course it goes without saying no such problem playing back the original, native m2t's.
Did you actually see any EX1 1920x1080 clips smart-rendered by Vegas, and how it was played back?
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October 21st, 2007, 06:39 AM | #29 | |
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I don't know why the hardware acceleration is having problems, this would be totally dependant on the graphics card itself, most likely not even a Nero issue. I can only speculate that as any mpeg-2 smartrender has to produce non fixed length GOPs this could be causing the hardware decoder to have issues. If this feature is vital to you my only suggestion is to try it on a better graphics card. |
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October 21st, 2007, 06:49 AM | #30 |
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Well, I guess it's vital to all of us, as it suggests the smartrendered mpg2's are not fully compliant. BTW I have a higher class ATI card with newest drivers, but this is of secondary importance as we cannot control how customers will be playing back stuff...
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