webm video alpha test demo

BTW, we created a Wiki article on using video textures with transparency. Feel free to add your own recipes here.

This stackoverflow topic outlines how to encode webm with alpha that works in iOS when libvpx is enabled.

I haven’t tested it yet as I just found this today and I haven’t encoded a video as posting this– but let me know if it works on your end:

https://stackoverflow.com/questions/69255568/how-can-i-convert-a-webm-file-with-alpha-channel-to-a-hevc-encoded-file-that-wil

I had to deal with videos containing alpha channels last year. The application had to run on pretty much every device (mobile and desktop). I researched that topic quite heavily at that time.

I’ve not directly used these videos in verge3d, but as part of a microsite. For pretty much every device which isnt that old webm as vp8 or vp9 works with alpha channel right out the box. Except apple, who whould have guessed that . I think the webm versions were also running on MacOS but not in Safari.

For apple devices you need to use .mov as a container and h265 as the codec.

Now the fun part: Encoding on windows the webm versions is quite easy with the adobe mediaencoder. Back then I needed to install an addon/hack in order to render webm out of mediaencoder. Dont know if this is still the case. h265: the only way back at that time was using a mac. Possible way one is using an encoder which comes prebuilt into the MacOS at a specific version. But sadly you dont have much control over bitrates and stuff. The better but the be paid option is to use compressor, there you got better control over the different encoding settings.

I dont know if this still applies today or if there is anything different when using the videos directly in verge.

Hopes this help