Problem with export of transparent webm video

[Andreas338193729wne]

Hey. I have a problem with exporting a transparent video to webm format. I used the webm plugin from fnord (version 1.5.0) for export, set the export with alpha channel, but the result is a video without transparency (yuv instead of yuva). Export to .mov (quicktime) is without problem. I have Adobe Premiere Pro 2025@windows11. Does anyone know what to do with this please?

[Ann Bens]

Dont think we can help you as its a 3rd party codec.

[Andreas338193729wne]

So no option to export or transparent webm from Adobe Premiere? In 2025?

[Ann Bens · Accepted solution]

You can export a file with alpha with Prores or cineform.

Maybe Shutter encoder can do the rest.

[Andreas338193729wne]

Thank you. The first part went off without a hitch and I got the mov video with transparency and yuva (prores). However, Shutter encoder mercilessly converts it to yuv without transparency, even though I enable the alpha channel in the vp9 codec settings (convert to webm)...

[Andreas338193729wne]

Problem solved, thanks for the advice.

[Ann Bens]

How did you solve this?

Might be useful to other users with the same problem.

[Andreas338193729wne · Accepted solution]

Disable GPU decoding and filtering in Shutter Encoder. The exported .webm file has its transparency preserved.

[Ann Bens]

Good for you!