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Pan & Zoom- change in black levels
Hi,
I’m working on Avid Media Composer 2.5.3. Trying to use the Pan & Zoom tool. I have pictures that I scanned in and fixed up in photoshop. .TIFF files, 300dpi, RGB, 16 bits/channel.
When I use the pan and zoom, the black levels seem to shift, half way through the zoom out or zoom in. My settings for the pan and zomm are. Filter: Avid Ultra Quality, Source has pixels, and RGB, cache Multi-Res., progressive Render mode.
Can you please let me know what I am doing wrong here?Thank you.
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7 Replies
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Are you noticing a change through extrnal scopes?
Jon
“So you want to throw out the old you – but the old you is old enough to know it won’t make it better”
Del Amitri – “Make it Better” -
No, this computer is not hooked up to scopes. I noticed the change in the color through the output monitor and also in my record monitor in the Avid.
Thank you
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I’m not sure what’s causing the level shift, but FWIW, your image specs (300DPI/16bit) are way overkill for pan and zoom, just my opinion. I would try a test at 72DPI. Make the photos NTSC safe (safer) in Photoshop by limiting RGB levels to 16-235. Some color ranges may still be “technically” illegal, but import at 601 levels and see if you still get the shift.
Pan and Zoom can be a resource hog. The large file sizes of 300 DPI may be affecting the software.
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I brought the pics back into photoshop and made them 72dpi and also resized them to 640×480. The shift in color still happens. Do you have any other suggestions.
Thanks
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Try unchecking RGB (I’m not in front of a machine so I don’t remember the settings). I may be wrong, but RGB is a different colorspace than 601/709.
Let us know if that helps…
Jon
“So you want to throw out the old you – but the old you is old enough to know it won’t make it better”
Del Amitri – “Make it Better” -
Hi,
I made adjustments to my import settings and even rescanned the photo into my computer and the problem was still there. However, when I went into pan & zoom, I lowered the Y position from 30 to 20 and when I played it back the photo did not shift in color. I also adjusted the size/zoom factor, on my second/last keyframe from 1.20 to 1. and the change also did not occur. Why would where the photo is positioned on the Y axis and the amount of zoom cause a shift in color?Thanks for all your help!!
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Rob –
I noticed from an earlier post you were running a card Avid doesn’t qualify – did you get a new card? Have you tried exporting your sequence to see if the change shows up in your final delivery format?
Jon
“So you want to throw out the old you – but the old you is old enough to know it won’t make it better”
Del Amitri – “Make it Better”
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