I've posted about this before. Even in an all Mac universe if you switch between Avid Hardware like NitrisDX the default value for black will be 7.5 which is basically correct except it elevates the blacks slightly and you have to lower it to 7.4. On the same Mac running a decklink card and the default for safe color is 0 and is basically correct except again the black is slightly elevated unless you set the black to -.01.
The kicker is that the DNxIO which is branded as Avid Hardware still behaves like 3rd party IO so when I switch between the Nitris DX and DNxIO on the same system I fight the same battle.
I discovered this about a year ago when I took a 4K project home from work and work was a NitrisDX and I was running my DNxIO at home and prior to that I had a BM Decklink SDI card that show the same behavior. I haven't checked on AJA IO but my experience suggests in the mac world any 3rd party defaults to 0 and any Avid hardware, except DNxIO, defaults to 7.5.
I haven't been on any PC systems to see if the behavior is similar and this also raises the question of what the behavior is with systems without hardware. I haven't checked that.
I agree this is a big pain and makes it hard to bounce. Is the I/O on the systems you are comparing both Avid or is one Avid and one not Avid I/O?
---In Avid-L2@yahoogroups.com, <tcurren@...> wrote :
Apply safe color in Mac and black says 0. Apply in PC and it says 7.5. Both result in proper black on output. But.... move between platforms and you have a problem. Going from PC to Mac for example results in elevated blacks by 7.5 IRE.
In the new file based universe, this is killer.
Terence Curren
Posted by: bigfish@pacbell.net
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