[GH-ISSUE #677] [Problem] High CPU usage after selecting frames to import from a video #2211

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opened 2026-03-01 18:54:31 +03:00 by kerem · 0 comments

kerem commented

2026-03-01 18:54:31 +03:00

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Originally created by @theFireProject on GitHub (Jun 12, 2020).
Original GitHub issue: https://github.com/NickeManarin/ScreenToGif/issues/677

Steps to reproduce

Open the ScreenToGif Editor
Load a video
press (File) > Load
pick a video file (.mp4)

"Import frames from video" window opens up

Maximize the window
Adjust the starting point of the picture sequence that's supposed to be imported
quickly press the arrow up button to increase the time by 10ms a lot of times (20 to 50 times, 200 to 500 ms)

Actual behaviour

While adjusting the starting point, the preview picture of the current frame updates quickly. It doesn't lag behind, this becomes evident when switich directions (changing from pressing arrow down or up). Still the CPU load continues a couple of seconds, maybe half a minute or a minute after stopping to adjust the settings. For that time the loading animation of the mouse pointer flickers while it is in ScreenToGif.
Here are the exact values: ScreenToGif creates 100% load on one logical core and 25% load for the program overall. (This means, one physical core is used at 100% without multi-threading.) While ScreeToGif is not busy it doesn't use more than 1% overall most of the time.

Expected behaviour

The CPU load is understandable while the program has to load the signle frames for the preview picture while changing the starting point. I assume that as soon as the preview pictures are not loaded (don't change) anymore (in my case this is max. 1 second after I don't adjust the settings anymore) the CPU load should stop.

Maybe the CPU load has a good reason, but I don't know the inner mechanics of ScreenToGif. From my perspective (that I explained above), it seems like the program creates more CPU load than necessary. I want to report this just to check whether it is indeed a valid issue or I'm mistaken.

Context

Video properties
Resoluation: 1440*2960
Total bitrate: 5441 kBit/s
Frame rate: 35.96 frames/second

Import properties
Scale: 100 %
Resolution: 1440*2960
Frame rate: 60 fps (maximum)

Screen properties
Resolution: 1920*1080
Windows scale setting: 125% (default for notebooks)

CPU properties
Model: Intel Core i5-8350U @ 1.70GHz
Base speed: 1.90GHz
Speed under load from ScreenToGif: 3.50-3.60 GHz
Physical cores: 4
Logical cores: 8

Programm properties
ScreenToGif version: 2.25

Originally created by @theFireProject on GitHub (Jun 12, 2020). Original GitHub issue: https://github.com/NickeManarin/ScreenToGif/issues/677 ## Steps to reproduce 1. Open the ScreenToGif Editor 2. Load a video press (File) > Load pick a video file (.mp4) "Import frames from video" window opens up 3. Maximize the window 4. Adjust the starting point of the picture sequence that's supposed to be imported quickly press the arrow up button to increase the time by 10ms a lot of times (20 to 50 times, 200 to 500 ms) ### Actual behaviour While adjusting the starting point, the preview picture of the current frame updates quickly. It doesn't lag behind, this becomes evident when switich directions (changing from pressing arrow down or up). Still the CPU load continues a couple of seconds, maybe half a minute or a minute after stopping to adjust the settings. For that time the loading animation of the mouse pointer flickers while it is in ScreenToGif. Here are the exact values: ScreenToGif creates 100% load on one logical core and 25% load for the program overall. (This means, one _physical_ core is used at 100% without multi-threading.) While ScreeToGif is not busy it doesn't use more than 1% overall most of the time. ### Expected behaviour The CPU load is understandable while the program has to load the signle frames for the preview picture while changing the starting point. I assume that as soon as the preview pictures are not loaded (don't change) anymore (in my case this is max. 1 second after I don't adjust the settings anymore) the CPU load should stop. Maybe the CPU load has a good reason, but I don't know the inner mechanics of ScreenToGif. From my perspective (that I explained above), it seems like the program creates more CPU load than necessary. I want to report this just to check whether it is indeed a valid issue or I'm mistaken. ### Context **Video properties** Resoluation: 1440*2960 Total bitrate: 5441 kBit/s Frame rate: 35.96 frames/second **Import properties** Scale: 100 % Resolution: 1440*2960 Frame rate: 60 fps (maximum) **Screen properties** Resolution: 1920*1080 Windows scale setting: 125% (default for notebooks) **CPU properties** Model: Intel Core i5-8350U @ 1.70GHz Base speed: 1.90GHz Speed under load from ScreenToGif: 3.50-3.60 GHz Physical cores: 4 Logical cores: 8 **Programm properties** ScreenToGif version: 2.25

kerem

2026-03-01 18:54:31 +03:00

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starred/ScreenToGif#2211

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