How do you make a video with a transparent background?

[Douglas Spotted eagle]

1. Shoot
2. Use Chromakey, Mask tool, or secondary color corrector to create transparent areas.
3. Render as uncompressed avi and in Custom, select the “render Alpha Channel and Create OpenDML.

This will give you the transparent channel you want. Only a 32bit file can carry the alpha channel.
You could also output a sequential PNG with transparency.

Douglas Spotted Eagle
VASST

Certified Sony Vegas Trainer
Aerial Camera/Instructor

[Jerry Waters]

Go to:

https://www.digitalproducer.com/articles/viewarticle.jsp?id=31596

that is the best Vegas Chroma instruction I ever found and it works well.

[Gary Vey]

THANK YOU very much! I was going crazy trying to figure out what format to render a video with alpha channel for import in Flash.

Thanks
Gary

[Holly O’neil]

Hello Borba Fett,

I am in search of the same thing you were about creating a transparent background “on” my chroma key green screen in Vegas. We want to also import it into flash. I see the answer you got but it didn’t work for us. Do you have any further insight?

The part selecting “render Alpha Channel” was greyed out and already checked it appeared. That was the only part of the directions we weren’t able to influence.

Any suggestions? Thank you so very much, in advance, Holly

[Douglas Spotted eagle]

If you want to import it to Flash, you’ll need to use the Uncompressed template, with the transparency enabled. There are other workflows, but this is the best way we’ve found.
https://www.liveoutloud.com/eventsAboutTeleseminars.php

Douglas Spotted Eagle
VASST

Certified Sony Vegas Trainer
Aerial Camera/Instructor

[Holly O’neil]

Thanks so much. The color picker (eyedropper?) did take out the green. I rendered as uncompressed AVI. Where is the transparency enabler? In Flash? If so, where in Flash? Our Flash person doesn’t know.

Can’t thank you enough. Holly

[Holly O’neil]

We have figured out how to render a transparent background using the chroma keyer! Thanks so much for your help! It was awesome! Holly

[Lee Bateman]

I am still having trouble where is the transparent setting? I have used crhoma keyer for projects before but not a transparent background for a video. I have tryed all suggestions above and I am not sure what to try next.
Thank you
Lee

[Edward Troxel]

You have to render to a format that can handle the alpha channel. Try rendering to Uncompressed AVI, go into the preferences, and make sure the option to include Alpha Channel is turned on.

Edward Troxel

[Holly O’neil]

Well, we had success this way. Open the video from the chroma keyer movie icon on the video. It is the little icon on the bottom right. It opens up all kinds of options. It’s the Video Event FX button. Then select the Chroma Keyer option. Then use the eydropper tool to take away green (or whatever color) background. You can even do this on the preview screen. Then to adjust the thresholds appropriately go ahead and place some video underneath the chroma key video to move thresholds till you get the best look. Then go ahead and delete that video. Then render as: Video for Windows AVI, use default template- uncompressed, then choose custom setting and then choose video rendering quallity best, then select the Video settings button and set at 720×480, field order none (progressive scan) and make sure render alpha channel (uncompressed window formats only) and create an OpenDML are checked. Then render. Voila! Thanks Douglas Spotted Eagle, Holly O’Neil