Overlay layout content isn't always on top

[alexharrington]

2R253.6

If I schedule an overlay layout (PNG image with transparency) and then at the same time run a layout with images or native video on it works as expected.

If then change the underlying layout to be an HLS widget, the overlay is initially shown but is removed once the video starts playing. May also be affected by showing embedded HTML that shows video.

[dasgarner]

This is caused by the HLS widget using the Edge browser component and not CEF. The edge component (and the IE one) are both not transparent in WPF and effectively punch a hole in the canvas.

[dasgarner]

Using the FFME replacement may solve this issue as we can render HLS using FFmpeg instead of Edge. This is proved to be the case in development.