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[GH-ISSUE #79] [Bug] KeypressOSD bugs #1440

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opened 2026-03-01 18:45:31 +03:00 by kerem · 7 comments

kerem commented

2026-03-01 18:45:31 +03:00

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Originally created by @Kristinita on GitHub (Feb 6, 2017).
Original GitHub issue: https://github.com/NickeManarin/ScreenToGif/issues/79

1. Summary

Sometimes I get bad quality GIFs use ScreenToGIF if I record GIF with KeypressOSD AutoHotkey script.

2. Expected behavior

Good GIF quality.

3. Actual behavior

Project,
ScreenToGIF encoder — I see nice image in my local PViewer program, but image nod displayed in any web hosting.
System encoder — nice image, but 150MB. Image hostings don't support very large images.
Legacy — bad quality:

4. Steps to reproduce

I record and edit my GIF → I save my GIFs in different encoders → I get actual behavior.

5. Environment

Operating system and version:
Windows 10 Enterprise LTSB 64-bit EN
ScreenToGIF:
2.4.0.170115
KeypressOSD:
2.10

Thanks.

Originally created by @Kristinita on GitHub (Feb 6, 2017). Original GitHub issue: https://github.com/NickeManarin/ScreenToGif/issues/79 ### 1. Summary Sometimes I get bad quality GIFs use ScreenToGIF if I record GIF with [**KeypressOSD**](https://autohotkey.com/boards/viewtopic.php?t=225) AutoHotkey script. ### 2. Expected behavior Good GIF quality. ### 3. Actual behavior + [**Project**](http://jmp.sh/zaTaKpJ), + [**ScreenToGIF encoder**](http://i.imgur.com/wQwsoWR.gif) — I see nice image in my local [**PViewer**](https://sourceforge.net/projects/picoviewer/) program, but image nod displayed in any web hosting. + [**System encoder**](https://app.box.com/s/pz4z0wcn322drlqn9na4a62lcrzc6lvk) — nice image, but 150MB. Image hostings don't support very large images. + Legacy — bad quality: ![Legacy](http://i.imgur.com/76Px5gN.gif) ### 4. Steps to reproduce I record and edit my GIF → I save my GIFs in different encoders → I get actual behavior. ### 5. Environment **Operating system and version:** Windows 10 Enterprise LTSB 64-bit EN **ScreenToGIF:** 2.4.0.170115 **KeypressOSD:** 2.10 Thanks.

kerem closed this issue

2026-03-01 18:45:31 +03:00

kerem commented

2026-03-01 18:45:32 +03:00

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@NickeManarin commented on GitHub (Feb 6, 2017):

The gif (from the ScreenToGif encoder) plays nicely on the link that you shared.

The gif (from the Legacy encoder) fails to render because the color being changed is close to the default dummy color (a color that will be represented as transparent), lime green.

I downloaded the project so I can debug it. Thanks.

@NickeManarin commented on GitHub (Feb 6, 2017): The gif (from the ScreenToGif encoder) plays nicely on the link that you shared. The gif (from the Legacy encoder) fails to render because the color being changed is close to the default dummy color (a color that will be represented as transparent), lime green. I downloaded the project so I can debug it. Thanks.

kerem commented

2026-03-01 18:45:32 +03:00

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@NickeManarin commented on GitHub (Feb 6, 2017):

I was able to identify and fix this bug. It happened because the encoder was set to use a dummy color, but it could not find when the perfect rectangle was introduced in a frame with no other pixel modification.

When failing to find the dummy color in the color map, the index 0 was set as transparent. That killed the red color in the example project.

@NickeManarin commented on GitHub (Feb 6, 2017): I was able to identify and fix this bug. It happened because the encoder was set to use a dummy color, but it could not find when the perfect rectangle was introduced in a frame with no other pixel modification. When failing to find the dummy color in the color map, the index 0 was set as transparent. That killed the red color in the example project.

kerem commented

2026-03-01 18:45:32 +03:00

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@Kristinita commented on GitHub (Feb 7, 2017):

The gif (from the ScreenToGif encoder) plays nicely on the link that you shared.

@NickeManarin, http://i.imgur.com/wQwsoWR.gif image successfully open for me in Chrome and Opera, but don't open in Firefox 51.0.1 (64-bit).
The problem reproduced for me in Safe Mode and in Firefox without plugins and user settings.

Firefox bug?

Thanks.

@Kristinita commented on GitHub (Feb 7, 2017): > The gif (from the ScreenToGif encoder) plays nicely on the link that you shared. @NickeManarin, **<http://i.imgur.com/wQwsoWR.gif>** image successfully open for me in Chrome and Opera, but don't open in Firefox 51.0.1 (64-bit). The problem reproduced for me in [**Safe Mode**](https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode) and in Firefox without plugins and user settings. Firefox bug? Thanks.

kerem commented

2026-03-01 18:45:32 +03:00

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@NickeManarin commented on GitHub (Feb 7, 2017):

@Kristinita Working alright with Edge.

@NickeManarin commented on GitHub (Feb 7, 2017): @Kristinita Working alright with Edge.

kerem commented

2026-03-01 18:45:32 +03:00

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@Kristinita commented on GitHub (Feb 8, 2017):

@NickeManarin , is it Firefox bug or ScreenToGIF encoder bug?

The problem reproduce for me in other file, which I get in ScreenToGIF encoder:

Project: http://jmp.sh/32AvhlU,
GIF: http://i.imgur.com/V3axgYT.gif.

GIF not open in Firefox.

Thanks.

@Kristinita commented on GitHub (Feb 8, 2017): @NickeManarin , is it Firefox bug or ScreenToGIF encoder bug? The problem reproduce for me in other file, which I get in ScreenToGIF encoder: + Project: **<http://jmp.sh/32AvhlU>**, + GIF: **<http://i.imgur.com/V3axgYT.gif>**. GIF not open in Firefox. Thanks.

kerem commented

2026-03-01 18:45:32 +03:00

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@NickeManarin commented on GitHub (Feb 8, 2017):

Looks like a Firefox bug. If you open that gif on Firefox, press F12 to open the developers tool, go to the Network tab, refresh the page to detect the GET command.

Hover the cursor on top of the thumbnail of the GET entry, you can see that the gif plays nicely.

@NickeManarin commented on GitHub (Feb 8, 2017): Looks like a Firefox bug. If you open that gif on Firefox, press F12 to open the developers tool, go to the Network tab, refresh the page to detect the `GET` command. Hover the cursor on top of the thumbnail of the `GET` entry, you can see that the gif plays nicely. ![image](https://cloud.githubusercontent.com/assets/14798947/22736675/83ed7ef8-ede6-11e6-90e9-3bb400d9de9b.png)

kerem commented

2026-03-01 18:45:32 +03:00

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@Kristinita commented on GitHub (Feb 10, 2017):

Bugzilla@Mozilla Bug 1338551.

Thanks.

@Kristinita commented on GitHub (Feb 10, 2017): Bugzilla@Mozilla [**Bug 1338551**](https://bugzilla.mozilla.org/show_bug.cgi?id=1338551). Thanks.

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