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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

Banding

James Page

James Page

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I've transcoded RED footage to 1080p ProRes 422 HQ files, full debayer.

In Finder and it plays back perfectly.

In FCP there is severe banding. Instead of a smooth lattitude everything looks like its been lightly compressed, with bands and sections of colours. I am trying to grade (using colorista 2) but its impossible because the image i'm starting with is so bad.

I've attached two stills to show the difference.





I've installed the latest FCS 3 installer, everything is up to date, but the problem remains.


Please help!
 
If the same files are playing back looking alright in Quicktime Player then the RED plugin isn't your problem.

From the looks of your screenshots it looks like FCP is trying to play back a lower/dynamic quality image. What are your sequence settings as far as RT goes? I would start there.

I'm 90% certain that the issue is preview related, not file/transcode related. I would be if you rendered the clip or timeline out it would be indistinguishable from the original when played back in QTP.
 
hi

Right click on your sequence > sequence settings > Render 10-bit ....

please render the video again and check :yesnod:

*** check with the attached pictures

please tell me what happen :)

Regards

Nawaf AL-Wahaib
 

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Just as a tip. You must realize that FCP is displaying only ONE FIELD of the video information in the VIEWER and CANVAS windows.

This is no way to critically judge issues like banding.

Generally, with an outboard monitor and a proper video card like a KONA or DECKLINK through a broadcast monitor you can look at a 10-bit video image and judge if there is any banding going on.

Also, banding can be "enhanced" depending on how you are color correcting or using feathered power windows in your shot.

David
 
Could also be FCP mucking around with the gamma.

Graeme
 
Thanks for your replies.

Nawaf: way ahead of you, and unfortunately its the same either way.

David: The quicktime proxies look fine in FCP, when i view the original R3D footage, or the ProRes clips in Quicktime player, it displays properly. Its only in FCP that the pro res clips display wrongly. It displays absolutely fine in Adobe Premiere CS5 also. So it must be an FCP thing. Any suggestions?

Graham: I think you might be right, what would you suggest i do?
 
That's tricky as FCP's gamma setting is for RGB and stills. You could see what your monitor gamma is at as that might interact with FCP. Any change of you putting up a clip for people to try to see what can help. Debugging FCP / Quicktime issues is always tricky so the many eyes approach might be your best bet.

Graeme
 
Make sure the viewport is set to 100% magnification.
 
another thing to do is to delete some of the files....I have to find the thread where this was addressed. Basically if you upgraded with FCS 3 from RED....it does not always install properly. I had to go through and manually delete the redcode and other files, THEN reinstall FCS3 from RED. Let me see if i can find that thread. but helped me for transcodes of 422HQ to look 95% of the RCX look files. No banding either. back in a bit
 
Did you check your footage via an I/O card with a proper monitor attached? It might be simply a display problem.

I can confirm that we get excellent quality in ProRes from R3D, working with FCP, a BM card, a HDP2 and a Dreamcolor. No banding at all.
 
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