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BM 10-bit RGB Codec Problems in FCP2
Hello,
I have a complete project that was graded in 16-bit and rendered in the Blackmagic 10-bit RGB codec. In Final Cut Studio 2 these files now play back darker than “normal”. When the play head is stopped the “proper” color, contrast and brightness is displayed. Hit play and the sequence goes darker about “1-stop”. Everything played back fine in Final Cut Studio 1!!! Has anyone run into this same problem?
Software: Final Cut Studio 2 & Decklink 6.2 Drivers, QT 7.1.6, OS X 10.4.9
Hardware: MacPro 2 X 2.66, 5 GB RAM, Decklink HD Pro PCI-eThanks,
Eric Jones
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11 Replies
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With an h.264 clip I was messing with yes. Its normally like that all the time.. doesn’t switch.. tiz funny.
Isn’t this the whole quicktime/fcp trying to be clever issue? showing you a preview of how it will look on a tv rather than a computer display?
It’s adjusting the gamma between 2.2 and 1.8. It’s not effecting the files. So if you playout via AJA or blackmagic.. or export as whatever file format they will not be effected.
Not sure how this effects Color as not tested to much yet.
p
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This doesn’t really pertain to my particular issue. The issue is that the video playing out of the Decklink card is playing back darker on the HD monitors, scopes, etc. and only during playback. If you park the playhead, it returns to normal. I’ve tested the other BM codecs and no other BM codec seems to be affected or behaving in this manner, only the 10-bit RGB codec which is unfortunately the codec I need to be working in.
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Ah ok. I had dvi out to an lcd so took it the BM output would be fine on a macpro.
Are you sure its incorrect on play? or inccorect on stop ?
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Hi Panello,
It’s incorrect on play, checked everything out with calibrated test patterns, etc. I submitted the problem to support and Kristian Lam is looking into it, so hopefully I’ll have some more news soon. As a side note, everything worked fine in FCP 1 with 6.2 drivers, so I guess I can always revert for now but naturally would love to get this up and going.
Thanks for the input though,
Eric
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Wierd. Maybe worth tring with maybe apple animation, pretty sure thats RGB also.
p
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Eric, you’re 100% correct. Its darker than it should be on playback. I’m seeing this as well with Photo-JPEG. Looks like this is happening with any RGB codec.
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Hi Everyone
Same problem here. Any news from Blackmagic?Harun
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Has anyone tried using the YUV Blackmagic 10-bit codec instead? FCP advises that graphics work is better off done in YUV. Why is this? I’m considering using Blackmagic to transport my film to the SPFX workflow, since it provides uncompressed frames, but this thread is making me nervous. Would love any info.
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What happens, if you disable -show overlays- and enable -Image- (not image and wireframe) in the canvas view pop-up menu. The gamma on your decklink output should not switch anymore. But I don
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Hi,
This is indeed an issue. I think it has to do with different RGB gamma handling in Final Cut Pro and we’re still investigating.
Eric, I’ve sent you a little test patch. How did it go?
regards
Kristian Lam
Blackmagic Design
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