Thanks Larry.

Sony, sort it!!

G

Hows about Avid's DNxHD codec, that support alpha, don't know about it and V11 but I'm hard pressed to imagine how they'd manage to kill it. It's also free and works in pretty well everything as it's a SMPTE standard codec.

Bob.

was under the impression that the free canopus codecs also did alpha?

Haven't tried canopus codecs but in 11 I'm unable to make a selection in DnxHD options for alpha. the radio buttons can't be selected.

I have used QT PNG in the past for alpha, but not very often anymore. The problem is that you end up with this dark black sort of halo around the non-transparent part that you can't get rid of. Now what I do is just render with a generated green where the transparent alpha layer would be and key it out later. With the New Blue keyer choke function, that way at least you can get rid of any sort of halo.

I don't think that the black halo has anything to do with QT PNG. I think it is a Vegas problem.

SONY, sort it!

Please?

G

"The problem is that you end up with this dark black sort of halo around the non-transparent part that you can't get rid of."

I have complained about this problem for over 5 years.
It has nothing to do with the codec used. The same two source videos, created in Vegas, composite perfectly in After Effects. I suspect the problem has something to do with how Vegas handles video levels but was never able to really get to the bottom of the problem.

Over the same period I've noticed a number of videos posted by other Vegas users that show this problem to a hideous extent.

Bob.

I've Lagarith. In Particle Illusion I CAN use it as my preferred tool to get my ALPHA working. Why doesn't SONY make it available in Vegas. Bizarre.

G

If you have a demon halo then swop the alpha to premultiplied dirty, even with a sequence rendered out from Vegas straight from a clean PNG will have a dark halo. Do a test and check it out. so once rendered change the rendered seq to premultiplied dirty to get rid of dark halo

Grazie you are working in 8bit right so use PNG sequences, after the initial render out work with the seq as premultiplied dirty. The codec thing gave me to many hassles DNxHD TGA format is ok for other aps not PI but still will be premut dirty.
If your content is for you tube “flip” who cares you don’t wear a tuxedo to go skateboarding

you don’t wear a tuxedo to go skateboarding

Who says so?

Thanks Roars, but SCS should get this as an option to allow, say Lagarith to ALPHA.

This IS 2012??

Grazie

I'll add, not only should every format that supports alpha internally be allowed to render alpha, but you should be able to render a separate grayscale file (in your format of choice) from Vegas' transparency channel that can be applied as a mask for compositing. In the long-ago past some NLEs allowed you to render "split-alpha" (Two files - one RGB and one 8-bit grayscale) and there's no reason that couldn't be done with most compressed formats if the user would choose to go that route.