[Question] Is it possible to play transparent web videos?

[jebenko91]

I am trying to play webm VP9 video that has transparent parts, but it appears that those transparent parts are drawn black.
Is there a setting to draw transparent parts transparent instead of black?

Steps to Reproduce

1. Open sample project
2. Choose transparent webm video
3. Play video
4. Transparent parts are painted black instead of transparent

Expected Results

• Video transparent parts should be transparent

fire-edge.webm

[LazyCuteLion]

based on my actual tests,webm only transparent on webbrowser,on wpf/ffme,you should be use mov or mp4(with png codec)

[LazyCuteLion]

hi,i got it!
on "MediaOpening", set the codec:
e.Options.DecoderCodec[0] = "libvpx-vp9";
i tested your video,it is be ok!
celebrate !!! because of mov/mp4 has too larger filesize,and it doesn't support web

[LazyCuteLion]

i convert your video,there is the file size:
mov:800MB (what!!!200% of source)
mp4:618MB (it is same as 420 files of png-sequence)