Grey and white squares appear in viewport instead of video

Bug
1

Hello!

I recently upgraded to a new laptop and installed ShotCut (version 26.1.30).

On my old laptop, with same OS (Windows 11) and same version of ShotCut I haven’t encountered this bug: when I play my cut video, the viewport shows grey and white squares instead of the video snippet, it takes a second or two at the beginning of every shippet and I cut my snippets quite short, so I can’t preview in editing and see what I’ve done anymore unless I export them. When I export the videos, they run smoothy, no glitches, no squares, but this impedes my editing process a lot!

Laptop specifications:

Graphics card: Intel UHD Graphics

16GB RAM

Processor: Intel Core i5-1035G1 CPU @ 1.00GHz

This started happening after I enabled the Use proxy, because my viewport preview was too laggy (it was also enabled on my old laptop and didn’t cause any problems). It happens with every project now. Restarting the program doesn’t change it.

Same OS, same version of ShotCut, same preferences set, but something is not working right on the new laptop.

I am attaching the log of this project, as well as linking a short video showing what’s happening:

https://youtu.be/1lyVgA8wOss

ShotCut-log1.txt (180.6 KB)

ShotCut-screesnhot
ShotCut-screesnhot1920×1080 357 KB

Any ideas how to fix that would be greatly appreciated!

2

Try turning off Settings > Preview Scaling > Use Hardware Decoder. It is new in this version and defaults to on.

3

I opened my projects again, the grid was showing up like usual and unchecked the Use Hardware Decoder, the grid didn’t appear anymore.

Checked it again to see whether this was causing it, but I am not getting the grid overlay appearing anymore (checked or unchecked), so not sure whether that is the exact solution or not.

Anyways, THANK YOU SO MUCH!