Video synchronisation with display refresh rate

[x3x7]

Expected behavior of the wanted feature

I am looking for ways to avoid tearing of the video playback which is most visible on panning sequences.

I am not an expert with mpv maybe this feature is already implemented. There is a command line option --opengl-swapinterval which defaults to 1 but does not seem to do much. Even if the frame rate is identical to the display vsync I can still see tearing in the output.

Can you please clarify how to achieve a tear free decode with mpv?

Alternative behavior of the wanted feature

No response

Log File

No response

Sample Files

No response

[llyyr]

What platform? If you're on X11, enable TearFree and use a compositor. On any other platform, there should be no tearing by default.

[x3x7]

I tried to enable "TearFree" in X11 configuration. Unfortunately the Nvidia custom driver does not like it. The X log (/var/log/Xorg.0.log) message is bellow:

[2325891.989] (WW) NVIDIA(0): Option "TearFree" is not used

[CounterPillow]

I'm a bit surprised you believe we're all just sitting here watching video with tearing.

mpv vsyncs by default, i.e., does not tear. If it does for you, then your system is broken. There's an FAQ entry that might help: https://github.com/mpv-player/mpv/wiki/FAQ#user-content-Tearing

My recommendation if you're on X11 is to not be on X11.

Can you please clarify how to achieve a tear free decode with mpv?

Decode is entirely unrelated to presentation.

[x3x7]

Thank you for the information.
I am using X11 with Nvidia proprietary driver 595.84 (RTX A5000 card) and Xfce4 desktop environment.

My recommendation if you're on X11 is to not be on X11.

I do not know if with my graphic card I can switch to a more suitable option.

[CounterPillow]

I don't know if Xfce4 comes with a compositor, but using one should definitely be your first attempt at solving this.

[x3x7]

There is a compositor as long as the window manager tweaks show. The shadows settings were disabled due to very high CPU usage when playing videos.

[na-na-hi]

On Nvidia with X11, Vulkan windows tear by default. It is likely that your mpv is using Vulkan, and fullscreen mpv window bypasses compositor and tears as a result.

You need to either use --gpu-api=opengl in fullscreen, enable Force Composition Pipeline, or disable compositor bypass in fullscreen.

[x3x7]

Thank you for the information.

Indeed, I did set "Force Full Composition Pipeline" in NVIDIA Settings. Not sure if --gpu-api=opengl is still needed but playback is now tear free to my eyes. The only minor issue remaining is that I have to manually set the display to a friendly fps to the video being played. Would be nice if mpv would also set the display fps to the best value for the video stream if needed. Maybe such feature is already implemented and I just need to dig deeper into the documentation.