Bug#881489: playback scaled to 4k fullscreen is choppy

[Daniel Pocock]

Package: vlc
Version: 2.2.6-1~deb9u1


Trying to play a video file with a resolution 720x526, 25fps, MPEG-1/2
(problem also observed with other videos at different resolutions)

With the window maximized and the option "Always Fit Window" selected,
it appears to zoom to 3:1 and playback appears good.

When fullscreen is selected (up to the 4k resolution of the display), I
frequently see what appears to be a horizontal tear across the middle of
the picture, especially when there is a lot of movement in the video.

Using mpv 0.23.0-2+b2 at fullscreen with the same video I don't observe
the problem.

I don't have libvdpau1 installed due to problems with the frame rate[1]

Hardware is Intel i3-7100U CPU @ 2.40GHz and Kaby Lake integrated
graphics Intel HD Graphics 620 (Kabylake GT2)

Regards,

Daniel


1. https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=856535