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Render problem when cropping image
Hi,
I’m doing a very simple crop of a picture, should be a 1 minute thing, but it’s not.
Description: I have a 1280×720 image, that I want to crop to 1280×564.
Process: I make a 1280×564 size comp and drop my 1280×720 into it. I have also tried the crop option in the render que.
Result: My blacks become grey. If I render with the same settings at 1280×720 everything is fine, but as soon as I do any cropping, I loose my blacks.
I have tried rendering the crop to tiffs first, and then importing that sequence and render out as a wmv or avi, but same problem occurs. Somehow the crop changes the black level. Anyone have any solution to this? Source is a wmv with compression none.
Thank you in advance!
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2 Replies
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Very curious. This sounds like a formats thing. What format are you rendering out?
For starters, I’d recommend that you export both versions as a Lossless Quicktime and see if they differ. If they don’t, then probably whichever format you are using only likes certain pixel dimensions?? mpeg?
I can’t say I’ve ever seen pixel size affecting gamma or levels though, although gamma is a thorny subject.
-Ben.
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Hi all,
thank you for you responses.
The scource is a 1280×720 WMV file that I converted to a TIFF sequence to work with. I converted it becuse AE didn’t seem to work very good with WMV files. The stuff I did on the sequence was just adding some text. Anyway, if I render this to my output format, which is either WMV or AVI (must play in Windows Media Player, any other suggestions?), everything works great, my blacks are black.
When I crop it by using a smaller comp or by using the crop options in the render que, my blacks become grey.
I export the 1280×720 final composite to a TIFF or Quicktime format, then import that to AE, crop it and render out, I loose my blacks.
If I render out a TIFF sequence of the final 1280×720, and open it in Photoshop, crop it, and render out as a new TIFF-sequence that I import into AE and render to a WMV or AVI, I loose my blacks.
Even if I just take one frame of the TIFF sequence, open it in Photoshop, crop it, save it, open in AE and render out as a WMV or AVI, the blacks become grey.
Suggestions?
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