Ventuz Forum

Hi all,

My client wants me to add various effects over a live video feed in our Ventuz Presentation, like falling snow, or a bouncing ball. The desired effects we can easily create using AE while maintaining the alpha channel (RBGA). However, what codec & container should I output to in order to have it run smoothly in Ventuz while still effectively utilizing the effect's alpha channel? I know Ventuz doesn't take AppleProRes, and while H.264 has worked well for me in the past, many online forums say H.264 does not support alpha channels.

FYI, project resolution is 6000x1000px as the presentation is played on 90-foot wide projection wall. I anticipate each effect will be 20-30 secs @ 30fps. File sizes might be a problem for uncompressed videos or image sequences.

Or is there a better way to achieve the desired effect?

Cheers!
Mervyn

Does this mean that you want to play a video in resolution of 6000x1000 px?
Quicktime Animation and DNxHD support alpha channel.

Cheers
Karol

Thanks Karol. I'll give it a shot and update with the results.

Cheers!

hi karol

afaik....dnxhd is supporting alpha...but ventuz is not supporting alpha in dnxhd!

greetz

christian

Yes,
I'm afraid that's true for the MovieClip Advanced node (I already issued a Bug ticket).
But in the Quicktime Movie node the Alpha channel is handled correctly

Cheers
Karol

I guess this means I will have to use 32bit Ventuz?

Karol wrote:Yes,
I'm afraid that's true for the MovieClip Advanced node (I already issued a Bug ticket).
But in the Quicktime Movie node the Alpha channel is handled correctly

Cheers
Karol

if you want to use dnxhd with alpha: yes

if you use qt animation with alpha: no....you can use the advanced movie node!

greetz

chriss

Thanks for pointing that out Chriss.

chriss0212 wrote:if you want to use dnxhd with alpha: yes

if you use qt animation with alpha: no....you can use the advanced movie node!

greetz

chriss