Posts: 4
Joined: Tue Aug 02, 2022 12:52 am

VLC overlay

Fri Aug 12, 2022 4:54 pm

Want to draw something over VLC-video (png image or black screen for example) using Bulleyes Lite x64 (no desktop)
Read about DispmanX and it's sounds good but have trouble:
DispmanX work only with fkms but VLC bad work with fkms (glitched hevc, drops output display on start), VLC good with kms

Can't use VLC internal --logo because need to dinamically control overlay (alpha, image files)

Have it any solutions to draw over VLC or cheats for VLC with fkms? Or maybe i miss something in VLC?

Using LibVLC with python-vlc
Rpi4 8Gb
Bulleyes Lite x64 (no desktop)
VLC last avaliable in apt


Posts: 4
Joined: Tue Aug 02, 2022 12:52 am

Re: VLC overlay

Sat Aug 13, 2022 3:42 am

Found dispmanx, it work but work only with fkms

VLC glitched with fkms (bottom and center parts of image delaying and blinkinkg, top always ok). If pause and unpause video - next time (random duration 1-10sec) video glitched, sometimes on start and sometimes random (1-2 times in 2 min). With 4k 60fps hevc video

Posts: 143
Joined: Thu Sep 03, 2020 8:09 am

Re: VLC overlay

Sun Aug 14, 2022 6:51 am

32bit or 64bit OS?
And is your last try still console (no X desktop)?

If you use X and KMS VLC should automatically select DRM for HW decoding HEVC and in fullscreen it should play without glitches. At least for 1080p50 HEVC. 4K 60fps I don't know actually, but Pi4 is specified for that, so should work.

What exact version of VLC are you using? If it works or not in console might depend on it.

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