The message Video file selection required means the internal video list was empty when Start Execution was clicked, so no valid video file had been registered. The knowledge base has no specific entry for this exact message, so the precise cause cannot be determined from the current information. Check the following in order:
- Row 1
Select Video/Audio: select the file again and confirm that its name actually appears in the file list area; if Folder is checked, a folder must be selected — uncheck it if you only want to process a single file. - Confirm the format is supported: mp4/mkv/avi/mov/wav/mp3. Other containers must be converted to mp4 first.
- Rename the file to a short name containing only English letters and digits (for example
video1.mp4), remove emoji and special symbols, and move it to a shallow directory (for example D:/videos). Files downloaded from YouTube/Bilibili with long names or emoji are a common cause of the file not being registered. - Turn on Windows "File name extensions" (
View ➔ File name extensions) to make sure the selected file is really the video and not a same-named subtitle/audio file. - Do not run
sp.exe directly inside the archive; extract the full package first, and wait for startup to finish before selecting files.
If the file is definitely selected and still produces this message, provide the last ~30 lines of the newest log file in the logs/ folder under D:/Downloads/win-pyvideotrans-v4.18 (together with the exact video file name and path) so the cause can be analysed.
Please refer to the related documentation: