Replies – Forums – Isaac Arias

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Isaac Arias
August 6, 2009 at 11:24 pm in reply to: Rendering unmodified footage causes dark, incorrect video gamma and hue

I just ran the QT gamma tag stripper and it didn’t find any tags on the HDV or the ProRes files.
Isaac Arias
August 6, 2009 at 8:56 pm in reply to: Rendering unmodified footage causes dark, incorrect video gamma and hue

Thanks for the quick reply Todd. Interesting point. I have NOT tried rendering to a container other than Quicktime. However, QT is currently part of my workflow and it would be great if I could keep it that way.

But I have to say that the problem begins even before I render anything. As soon as I bring footage into AE I see the darker, murkier image in the preview window. No matter how much I fiddle with color management, working space profiles, display profile calibration, etc. I can’t get it to look “right”. Even footage that is not in a quicktime container, like a PNG sequence as I mention above in my reply to Michael, looks very different compared to how it’s displayed by other Mac applications, except, predictively, Photoshop, which recognizes the PNGs profile as sRGB. You can easily try it yourself with those plates mentioned in the other post.

I’ll look around for ways of removing the gamma tag (if it’s in there) and see if it makes a difference in the meantime, but given the PNG scenario I described, I’m a bit skeptical.

Just to be clear, I wouldn’t mind working with a darker preview if the final rendered composite matched the original footage when I roundtrip it back to FCP, for instance, but that’s currently not the case. Manually applying color correction and gamma adjustments in AE to try to match it is just crazy.
Isaac Arias
August 6, 2009 at 8:28 pm in reply to: Rendering unmodified footage causes dark, incorrect video gamma and hue

Thanks Michael. I’ve seen Dave’s “stock” answers and that’s why I also tried transcoding the captured Apple HDV QT file into ProRes, which does not have inter-frame compression. Alas, I get the same result. In fact, even starting with a PNG sequence (bypassing input codecs altogether), I still get the same problem. I created a different posting where I mention that case at: https://forums.creativecow.net/readpost/2/962191.

The only thing I haven’t tried is using something other than Quicktime as the output container. I’ll reply to Todd’s message below about that.
Isaac Arias
August 6, 2009 at 3:05 pm in reply to: HDV Prep, YUV or RGB

Hi Dale,

Without getting into the details of color spaces and sub-sampling, there’s an interesting suggestion on the first reply to this thread: https://forums.creativecow.net/archivethread/2/598463.

You might as well give it a try.