Green / mauve video thumbnails

[AC Question]

I have just rooted my Nexus 7 2012 to Lineage OS vis Nexus Root Toolkit.
That's all fine, but the thumbnails for my mp4 video files are tinged green or mauve or both.
AVI and WMV and all Jpeg thumbnails are normal
This problem occurs irrespective of the viewer I use.
An internet trawl has shown no potential solution.
Help please.

 

[B. Diddy]

Moved to the Nexus 7 (2012) Rooting forum.

 

[donwb]

Could you please tell me how to find the "Nexus 7 (2012) Rooting forum"

 

[B. Diddy]

You're in it right now: https://forums.androidcentral.com/google-nexus-7-2012-rooting-roms-hacks/