: Use the VideoWriter class. Ensure you specify the correct FourCC codec (like avc1 for H.264) to ensure compatibility.
The file appears to be a video file that has been accidentally double-extended (containing ".mp4" twice). This often happens when a user manually adds an extension to a file that already has one hidden by system settings. Understanding the Double Extension 9126354.mp4.mp4
: Most modern media players, such as Windows Media Player or VLC Media Player , will play the file regardless of the double extension because they identify the file type by its internal "atoms" or "boxes" rather than just the name. : Use the VideoWriter class
: 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) This often happens when a user manually adds
Is there a way to show Director or Writer for mp4 in windows explorer?
If you are trying to "write" or generate this file programmatically: