Error with video format NV12

Hello Alonso,
Answering your question - most likely, if you see this message for the file, you probably will not be able to trim it with frame accuracy. However, you can send your file to our tech. support so we can check it. Please do not forget to make any reference to this post in your e-mail.

PS: I tried to insert the picture directly into this message, but I couldn't figure out how to do it. Can you tell me how to do it?

Inserting pictures directly is not possible.

I'm trying to edit a wmv file. When Splitter opens it it displays a cryptic error message:
https://www.dropbox.com/s/3419i17s7gdyts8/Screenshot%202020-02-20%2010.32.40.png?dl=0

Does it mean that I can only make the cuts in the K-frames? If so, is there any way to fix it?

Thank you

PS: I tried to insert the picture directly into this message, but I couldn't figure out how to do it. Can you tell me how to do it?