rendering avid compression the options for 601 or RGB available, anyone know if one's better, obviously when importing in avid the import settings have to match up, what happens if they dont? like say you render 601 but import RGB.
having a lot of problems getting things correct for broadcast,
first my levels are hot even though i put broadcast color effect on and limited to 90 ire, still blown out. then i get this grid type thing in the background.
conforming my work to a certain method of render/import is fine, i would simply like to know the best method for quality.
does anyone know where i can consult for this. AE to avid. is there a bible for this?
thanks
I found this on the avid user forum. Thanks to Miles Archer.
Translating IRE's to a scale from 0 to 255, 7.5IRE black = 16, and 100IRE white = 235 (since there is a concept of superwhite, someone decided to leave some 'headroom' in an 8bit version of video). You can create a file where all the normal image values fall within the 16-235 range, but this is an unusual, specialized image 'color space'.
For non-video graphics, black is generally 0 and white 255. To import such an image, avid can scale the values of every pixel so that in the imported file, black becomes 16 and white 235, the normal video range. The 'rgb' import option tells avid to think this way, and is your ordinary choice for photoshop creations, images you found on the web, etc.
For the odd case where you have a file already in video color space, the '601' option tells avid to leave the values alone. This allows something like avid's color bars file to have superblack and superwhite values in the image.
The other important case is alpha channels. If you have an alpha channel with black areas at 0 and white areas at 255, and import with 'rgb' values, avid will compress the values into the 16-235 range, preventing your matte from specifying fully opaque or fully transparent pixels. The '601' option is therefore appropriate for importing mattes.
So yes, even if your colors are all 'legal', the rgb option will scale them. It will make the whites even duller and flash the blacks, if I understand correctly.
Hope this helps some.
Dave