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Exported DVD has artifacts all over it
Hi All.
I have exported to DVD from Premiere Pro 2.0 and for some reason I’m getting quite a number of artifacts in this particular video.
The video is only 4:30 long, and so I’m using the PAL 16×9 VBR High quality setting to maximize the quality. I have also tried other
applications (Canopus Procoder, Sorenson Media) and both exhibit the same blue and red blocks in the resultant VOB files.
Is this a problem with the original video footage (I know it’s not shot very well and some areas are crushed or blown out), or do I have a bad encoder
codec somewhere, or what? Previous DVD’s have generally been very good. -
4 Replies
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It sounds as if you’ve done the diagnostics already…
Past DVDs have been good and every encoder you own is giving you similar results…
Unless all three of these encoders are somehow broken…I’d say it’s in the source footage. Have you attempted to color correct the poor quality sections so they at least are within normal video luma and color ranges?
It may be the source file as well…perhaps there are decode problems.
TimK,
Director,
Kolb Productions,Creative Cow Host,
Author/Trainer
http://www.focalpress.com
http://www.classondemand.net -
And unfortunately, the overblown areas probably can’t be corrected. What format was the original footage in?
As Tim said, over-saturated colors will emphasize artifacts because any noise in the video becomes suddenly much more visible, forcing the encoder to deal with much more information.
BTW, save yourself some time on the encoding. For anything under 1 hour long, use CBR 8Mbps in custom settings under video.
Cheers,
Vince
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Hi Tim and Vincent.
Thanks for your responses.
Tim, yes I agree that it is probably the source footage. It’s DV, and was shot in a hurry for a previz, so lots of blown out highlights and crushed blacks.
The artifacts show particularly badly in the black areas. I have thought it might be the source footage. My main concern is that the problem might rear it’s
ugly head during a more critical encode, so thought I would ask for some hints.
Vincent, yep the highlights are definitely really overblown! Thanks for the tip on CBR. I thought VBR produced a better result regardless of video length, but now
that I have had more time to think I realized that the reason we use VBR is to maximize the quality of longer form projects!
I thought it also might be useful to post a frame-grab of the errant video. Is there a way to do this?
Cheers once again,Glenn Miers.
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Glenn,
If you want to post a grab of the timeline, just choose Frame in the export menu.
You’ll probably have to convert it to a high quality JPEG using Photoshop or the likes.
To grab a screenshot of your screen, use the print screen key on the keyboard, and again paste in Photoshop, etc.
To post it, use one of the many free websites, photobucket.com is one of them.
Vince
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