On a current project we output to HDCam tape with no color correction and send the tape to a facility with Baselight. When there are fixes we export small same as source QT .movs of the change sections and the reinsert them at the Baselight facility. I've just been informed that when we export a section that has keyed in graphics, like a score board the Baselight whacks out when these are imported. The blacks turn purple and the colors are off. Their solution is to convert the Avid DNX 220 and perhaps an occasional 220X to ProRes and then they import properly into Baselight. There was some thought about the alpha channel from the source graphics but this makes no sense as Avid doesn't support any Alpha export and DNX has no Alpha channel support other than DNX 444 as far as I know. There has been in the past a mis importation of RGB graphics as 709 which leads to video well under 0 and over 100%. Since I've been on the project I correct
this issue but I'm told they still have problems importing anything with a keyable graphic. A clip that is just a field source from a file is no problem. A graphic Animation is no problem but when the same animation has a keyable text graphic over it then there are problems. All these elements except the field source files are coming from graphics using AE. This all makes no sense to me. I checked my QT exports and they all show as Avid DNX with millions not millions + so there is no alpha channel that I can detect. I'm also told the facility has or is thinking of checking with Baselight to see if the problem is on their end. Any of our Baselight Guru's got any insight about importing issues with Avid DNX220 and or 220X. I'm am at a loss as I've not got any baselight chops to draw from.
John Moore
Barking Trout Productions
Studio City, CA
bigfish@pacbell.net
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