Topic: Exponential output dropped frames in mpv when speed > 1.0x (SVP active

Hello everyone,
I'm experiencing a performance issue with the integrated mpv on SVP that hasn't occurred before. Recently, any increase in playback speed (even just 1.1x) causes the Dropped Frames counter to rise exponentially.

In the past, I was able to achieve speeds up to 1.8x without any frame drops on the same hardware.

I was testing some "mpv.conf" files to copy and paste and ended up not backing up what I was using. I don't know which command line is sorely missed, because as I said, I was able to interpolate and speed up the frames without any problem before.

I'm even interpolating to 72 frames per second; I saw that perfect multiples are ideal, is that correct? Unfortunately, even with it enabled, I can't perceive any difference in smoothness. I hope that when I buy a 240Hz monitor, this will change.

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2 Reply by Chainik

Re: Exponential output dropped frames in mpv when speed > 1.0x (SVP active

if you have 72 Hz screen and do frame interpolation up to 72 fps, and then increase playback speed to 1.1x, then you definitely must have 7-8 frames per second dropped

3 Reply by dawkinscm (edited by dawkinscm Today 09:51:22)

Re: Exponential output dropped frames in mpv when speed > 1.0x (SVP active

Also the dropped frames rising counter doesn't always mean that you see actual issues on screen. Partially because, good displays are can hide such issues and partly because just opening the mpv overlay is a minor tax on the system which can cause mpv to drop packets if you are already at the limit.

Re: Exponential output dropped frames in mpv when speed > 1.0x (SVP active

Chainik wrote:

if you have 72 Hz screen and do frame interpolation up to 72 fps, and then increase playback speed to 1.1x, then you definitely must have 7-8 frames per second dropped

I believe the solution is some kind of command line in mpv.conf.

As I mentioned in the post, I was able to use it without problems even at speeds like 1.5-1.8x with interpolation enabled.

5 Reply by Chainik

Re: Exponential output dropped frames in mpv when speed > 1.0x (SVP active

you want something strange...
72 frames per second at 1.5 speed is 108 frames per second
your 72 Hz screen won't show 108 frames per second regardless of any command line options
it will only show 72 frames. because it's 72 hz big_smile