Distortion/stripes for HQ mp4 files

[lal12]

I noticed that VLC has some distortion (looking like stripes) on some kind of video files.
I know this issue for years but never found any information on what it is, how it occurs and if something can be done about that.

I attached an image showing the video playing in Firefox and VLC 3.0.8 (with the media information window opened). I marked some placed where the difference is more noticeable but this pretty much affects the whole movie. I assume that it has something to do with interlacing, but when I switch off the deinterlacing (or change any related setting) nothing changes.

[InTheWings]

I assume that it has something to do with interlacing, but when I switch off the deinterlacing (or change any related setting) nothing changes.

I think deinterlacing filter is not working with your hardware acceleration backend.

If you're using VLC 3.0.x and have video issues.
Try:

1. Preferences -> Input/Codecs -> Disable hw decoding
2. If you are a Windows user, Preferences -> Video -> Change from direct3d11 to direct3d9

If any solution works, please tell us which one solved your case, Please also quote your video driver name and version.

[InTheWings]

Or more stupidly, because it's 25fps, likely it was not deinterlaced before re-encoding !

[lal12]

Yeah thanks disabling HW decoding definitely helped. However I wonder that neither firefox, chrome nor other video players I tried are using hw decoding. I also noticed that issue with different notebooks/PCs Intel/AMD/dGPU on Windows and Linux so I guess it is not an issue of my hardware specifically.