It would be great to get alpha transparency to work for video output too.

Currently it works great for PNG export, but my main use case is video, and as far as I can tell, with the current version (6.2), the alpha channel is lost when generating an MP4 file.

These links might be relevant:

• https://www.digitalrebellion.com/blog/posts/list_of_video_formats_supporting_alpha_channels
• https://www.reddit.com/r/ffmpeg/comments/a06oxh/best_format_to_compress_transparent_video/

Thanks.