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[GH-ISSUE #1399] [Bug] Unable to load a Video (Cannot mix synchronous...) #3657

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opened 2026-03-01 19:14:37 +03:00 by kerem · 0 comments
kerem commented 2026-03-01 19:14:37 +03:00
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Originally created by @diogotex on GitHub (Jul 7, 2025).
Original GitHub issue: https://github.com/NickeManarin/ScreenToGif/issues/1399

Originally assigned to: @NickeManarin on GitHub.

Describe the bug
When Im at editor mode and try to import a .mp4 video, the preview apears perfectly but I can only import using Media Player as importer, and not FFmpeg as before. Via Media Player the color get a bit darker.
And via FFmpeg I get the error message:

Unable to load video
Cannot mix synchronous and asynchronous operation on process stream.

To Reproduce

  1. CHoose editor mode
  2. Drag and Drop a video .mp4
  3. Click OK to import using FFMpeg

Expected behavior
Import the video on the editor mode

Screenshots
Image

Desktop (please complete the following information):
Windows 10
V 2.41.3

Originally created by @diogotex on GitHub (Jul 7, 2025). Original GitHub issue: https://github.com/NickeManarin/ScreenToGif/issues/1399 Originally assigned to: @NickeManarin on GitHub. **Describe the bug** When Im at editor mode and try to import a .mp4 video, the preview apears perfectly but I can only import using Media Player as importer, and not FFmpeg as before. Via Media Player the color get a bit darker. And via FFmpeg I get the error message: Unable to load video Cannot mix synchronous and asynchronous operation on process stream. **To Reproduce** 1. CHoose editor mode 2. Drag and Drop a video .mp4 3. Click OK to import using FFMpeg **Expected behavior** Import the video on the editor mode **Screenshots** <img width="846" height="552" alt="Image" src="https://github.com/user-attachments/assets/e87d4c05-68e0-431a-acfa-ddd77224a32f" /> **Desktop (please complete the following information):** Windows 10 V 2.41.3
kerem 2026-03-01 19:14:37 +03:00
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starred/ScreenToGif#3657
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