#7279 Video file selection required

This is not an error — it is a normal validation prompt. The software simply requires you to select at least one video/audio file before it can start processing.

How to fix:

1. Click the top-left button Select audio or video and choose your file (mp4/mkv/avi/mov/wav/mp3 supported).
2. If you want to process a whole folder, tick the Folder checkbox instead.
3. Verify the file path appears in the input box at the top of the interface.
4. Then click Start.

Additional note about your setup:
Your install path is D:/Program file/win-pyvideotrans-v4.12-0908, which contains a space (Program file). Spaces and special characters in the path can cause failures in FFmpeg and other subprocess calls during processing. It is strongly recommended to move the software to a simple English path without spaces, for example:

D:/pyVideoTrans

Please refer to the related documentation:

• First-time quick start
• Getting started