Ai, which doesn't always give accurate info, suggests this. Worth a try...
"Yes, there is a way to stop the filename from appearing on the first slide of your exported slideshow in NCH PhotoStage. To disable this, follow these steps:
- Open your slideshow project in PhotoStage.
- Press Control + P to open the program settings.
- Navigate to the "Subtitles/OSD settings" section.
- Untick the options for "Show Media Title on Video Start" and "Enable on screen (OSD)".
After making these changes, export your slideshow again to .mp4 format. The filename should no longer appear on the first slide when you play back your video.
If you still encounter issues, you may want to check if your video player has any settings that display file information. Some media players have options to show or hide file details, which you might need to adjust separately.