If you are trying to "write" or generate this file programmatically:

Is there a way to show Director or Writer for mp4 in windows explorer?

: Use the VideoWriter class. Ensure you specify the correct FourCC codec (like avc1 for H.264) to ensure compatibility.

: If you need to see details like the director or writer, you can view file properties in Windows Explorer or use specialized tools like Mp3tag . Technical Context (For Creators)

When you see a file named 9126354.mp4.mp4 , it typically means: