Video Loads
Sound works
Video is white Screen
Same File in lower resolution works fine.
By the way, Support for 3D Videos should be nice 
Hi,
What resolution are you using? Or perhaps can you provide a sample video that we can check this with?
Video: HVC1 7260x3630 59.94fps 39988kbps [V: hevc main 10, yuv420p10le, 7260x3630, 39988 kb/s]
Audio: AAC 48000Hz stereo 335kbps [A: SoundHandler (aac lc, 48000 Hz, stereo, 335 kb/s)]
These are 180° [3630x3630] + [3630x3630] Mpeg4 Video Files.
If I use the same file in lower resolution, everything works fine.
File size : 10 GB - 20 GB ;-)
By the way : sound works in every case => video is loaded correctly. Render issue.
When you drop this video in Edge Chromium, is Edge Chromium playing it well?
LOL,
The Media Player is a Micro Web browser 
Your assumption, that ...., was right.
Same Effect. No Picture, Sound works as well.
Maybe this helps:
Hi Bruno,
this seems to be a resolution issue. ( lower Resolution worked fine )
I can avoid this when I use lower resolution for the preview.
but there is another problem 
I can't figure out where TRectF is defined. But I think it's general not your idea,
to generate a default BeforeDraw Event Handler with an unrecognized datatype.
regards Wolfgang
Edit : -> System.Types ...
Yes in System.Types