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CrendKing / avisynth_filter

DirectShow filters that put AviSynth and VapourSynth into video playing
MIT License
107 stars 8 forks source link

Random frame skipping when playing 4K video #17

Closed z826540272 closed 3 years ago

z826540272 commented 3 years ago

Random frame skipping when playing 4K video + SVP . CPU utilization is around 50-60%.

CrendKing commented 3 years ago

Frame dropping is usually caused by CPU unable to catch up with the speed of playback. It depends on how fast your CPU can work and how much work you are giving to it. You can either upgrade the hardware, or reduce the the settings in SVP (e.g. instead of tripling the FPS, try doubling see if it improves), or select different parameters (e.g. instead of using 2 threads, try 4 threads etc).

If the source video is too large (e.g. 4K or 8K) for your hardware to handle, there is really nothing I could do to help. According to our experience, this filter does not introduce much overhead.

However, if you can identify a particular part of the source code that is not optimal, feel free to suggest a change.

z826540272 commented 3 years ago

CPU utilization is around 50-60% ,doesnt take up too much，I had a custom script to solve this problem, the secret key is : Prefetch(6,frames) parameters ，but it brings another problem, the player randomly freezes when seek . I must close it and reopen it. So it's not a problem with my computer, it's a problem with the whole playback workflow.

CrendKing commented 3 years ago

Have you tried to increase output thread count? It's a hidden setting in registry. SVP should have set it to 1 as default.

You can find the registry key by following https://github.com/CrendKing/avisynth_filter/wiki/How-to-enable-logging. Once you got there, find OutputThreads and set to 2 or more.

CrendKing commented 3 years ago

Close due to inactivity.