Change multiple Alpha Channels

TeeJay wrote on 6/27/2008, 5:56 PM
Hey everyone,

I'm currently working on a project where i have a hundred or so clips that i've exported from Ultra2 as 32bit AVI. As i bring them into Vegas (using V8b) i have to right click>properties and then select Unmatted so that i get the alpha channel.

Anyway, doing this to every clip is quite tedious but if i select multiple clips and right click the properties selection is "greyed out".
Is there a way of doing this to multiple clips? I have UltimateS2 but can't see any script option for it.
Does anyone know of a way to change properties of multiple clips?

Cheers,

T

Comments

rs170a wrote on 6/27/2008, 7:42 PM
See if this works for you.
Import one clip to the timeline, right click & select Properties-Media and choose the desired alpha channel method.
Then click the Save icon beside the dropdown box next to "Stream".

Mike
TeeJay wrote on 6/27/2008, 7:56 PM
Hi Mike,

Thanks for your suggestion. I tried that and it is not working. It just seems to "detect" any time that same clip is used again within the project.
Grazie wrote on 6/28/2008, 12:16 AM
OK . .

Excalibur 6 and UltimateS Pro 4 have multiple Event media<>Alpha "change" options.

I can do this very quickly in Excalibur 6:

Make Event Selection > Set Video Properties > Set Alpha Channel > DONE!

In US4 there is a a TAB for Visual Effects where you can pick up the an Events values too!

But, but but . . here is my real question: Why is it I can Copy and Paste attributes to multiple Audio Events - eg "Normalisation" - but I can't do this with the Event's Video Alpha channel? Anybody want to have a go at that one?

Grazie


farss wrote on 6/28/2008, 1:26 AM
"Anybody want to have a go at that one?"

I'll bite :)

I think you can copy and paste any of the "Video Event" properties but not the "Media" properties.
Even in the media pool selecting multiple video clips I find I cannot change say Field Order to None.
Possibly has something to do with the Apha Channel, Field Order etc coming from the media file itself whereas things like Normalise only apply to the media within that Vegas project.

Bob.
Grazie wrote on 6/28/2008, 1:40 AM
Yes, Bob, understood. One doesn't wanna muck about with the underlying Media profiling. Sure. There must be some very good reasons NOT to be able to do this. You'd think? Yes?

Then why is it Excalibur CAN get "close" to this, and THEN go ahead and then do it?

Grazie
TeeJay wrote on 6/28/2008, 3:23 AM
Well as i suspected, it seems there isn't any native setting within Vegas to achieve this then......

Grazie, if you're sure this can be done in UltimateS4, it may well be worth my while to upgrade from my UltimateS2, been thinking about it for a while for some other features but this'll definately seal the deal.

Thanks guys!

T

farss wrote on 6/28/2008, 3:53 AM
I can understand why you'd want to be careful with the properties of the underlying media.
What concerns me a bit is that I don't ever recall seeing Vegas read the alpha flags from a file. This leaves us to guess what they should be. Combine that with the plethora of choices in compositing mode and it all becomes a bit much to wrangle getting a good looking outcome.

I don't know if:
a) Vegas just isn't doing it right.
b) There's no common standard for the flags in files anyway
c) Whatever wrote the file in the first place got it wrong.
d) All of the above.

Whichever I just wish the problem would get fixed.
Even a tool to manipulate the alpha channel flags in a file might be handy so we could fix the file(s) once and be done with it.

Bob.
Grazie wrote on 6/28/2008, 2:00 PM
"Grazie, if you're sure this can be done in UltimateS4 . . .

Is there a demo you can see if it fits the bill for you? Or ask the VASST guys if it will do it for you? Only takes an email - yeah? Up to you.

Regards

Grazie

TeeJay wrote on 6/28/2008, 4:05 PM
Yeah, downloading the demo as we speak.............. thanks.

Edit: Installed US Pro and can confirm that it does exactly what i want!
Awesome! Thanks Grazie for the "heads up" on this. What a time saver for me!

T