Hi all,
Was wondering if anyone can give some advice to help solve a problem I am having with Pre. Pro 7 and capturing footage recorded in 25p (PAL).
When there is movement in the shot, say an upward tilt, the sequence gets a small judder about once a second. When it first happened I thought I must have set something to NTSC, but no, it is set to PAL and at 25 f/s. I have tryed setting the capture to; no filelds (progressive scan), and lower fileds first, neither has any positive effect.
I have tryed capturing from both a small SonyDCR-HC1000 and also the camera it was filmed on, a Panasonic DVX 102b. I am on a PC platform, and have tryed adjusting as many setting related to capture as I can find, all to no avail.
Has anyone experienced this before, or has anyone got any suggestions about this.
Cheers
Jon
Was wondering if anyone can give some advice to help solve a problem I am having with Pre. Pro 7 and capturing footage recorded in 25p (PAL).
When there is movement in the shot, say an upward tilt, the sequence gets a small judder about once a second. When it first happened I thought I must have set something to NTSC, but no, it is set to PAL and at 25 f/s. I have tryed setting the capture to; no filelds (progressive scan), and lower fileds first, neither has any positive effect.
I have tryed capturing from both a small SonyDCR-HC1000 and also the camera it was filmed on, a Panasonic DVX 102b. I am on a PC platform, and have tryed adjusting as many setting related to capture as I can find, all to no avail.
Has anyone experienced this before, or has anyone got any suggestions about this.
Cheers
Jon
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Re: a judder in progressive scan capture
Wed, June 20, 2007 - 8:51 AMThree questions:
1) Are you using the same disc to capture to (scratch disc) as which your program resides? Its is reccommended that they be a separate hard disc, and I recently solved a dropped-frame problem that way.
2) Does your hard disc run at 7200 RPM? This is the minimum reccommended disc speed for capturing video.
3) Does your audio rate setting match the source? Have you tried capturing at 48k, 44.1, 3200? If these don't match, there might be a video capture problem.
It sounds like the capture process is being interrupted, but going indetected by Premiere. Do you have your capture window set to Abort on Dropped Frames? -
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Re: a judder in progressive scan capture
Thu, June 21, 2007 - 8:42 AMThanks Hjiorst for your response.
In reply to your questions I will answer as best I can:
1: I am using a Sony Vaio to capture, which in itself as a hard disk partition. Therefore the software is running from C and the Scratch disk is D. There may well being something in this issue though, but due to the desire to capture with Firewire and my vaio only has one firewire port which means captuing directly to an external drive would have to run through USB.
2: Yes I beleive the harddisk in the Vaio is running at 7200 rpm.
3: The audio rate for capture and sourse are the same at 48k.
Now I have been doing some further experimenting, and it seems that this may well be a display issue. As I have just made a DVD with a sample of the juddering capture and when viewed on a TV all is normal. I am assuming now that somehow the graphics card or CPU are struggling to cope with the size of info I am throwing at it for display purposes only. I am assuming that 25p (progressive scan) has more data than interlaced footage? As I had not noticed this issue when catuping from my Sony Camera that records interlace.
So now, not so much a problem, just an irritation when viewing while editing. Thanks for your help, and maybe this will still be of benifit to others.
Cheers -
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Re: a judder in progressive scan capture
Fri, June 22, 2007 - 10:28 AMSony Vaio? This may not be pertinent anymore, but once upon a time I was warned about using a Sony Viao for use in video presentations, because in that system, when your main processor reaches its limit, it borrows power from... the video processor! Resulting in messed up video displays when perfoming complex actions.
Sounds just like the problem you're having. Good luck.
Also, though your problem seems to be only with the display during editing, I don't know if partitioning a hard disc is the same as using a completely different hard disc. My first thought is that if anything, it would be more problematic. I believe the goal is to have one disc dedicated only to capturing video, while the other runs the program, to avoid having the one disc stop one thing to do another. But maybe someone else has more direct knowledge of this issue. -
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Re: a judder in progressive scan capture
Mon, June 25, 2007 - 5:33 AMYou may well be onto something there. The only thing is, this is the first time I have noticed a problem in the 2 years I have been editing on this system, other than slow speeds when rendering and transcribing. Also it seems that no frames are being dropped its just that the display is having trouble processing the data, thus creating this judder when editing (sort of irritating).
I wonder whether, over time the PC platform is degenerating somehow, as I have heard such life span issues about PC's in the past, or whether it is somehow due to now using footage that is filmed at 25P. But I really am not an expercienced PC user, and am just starting to experiment between Interlacing and Progressive. Any idea's?
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