I second @soloporhoy666 note, it probably is caused because of a audio decoding error. What does ffprobe say? If you share your audio file I can try to run a test on it.Thanks for the tip! I used supjav, converted to a sound file via VLC, and ran it again. Made it to 1:07:00 this time - 1000 lines. Its strange because the converted file still has clear sound but Whisper/VAD process did nothing with it. I'll mess around with it again and let you know. I don't want to clutter up the jav subtitle posting area with my tech problems too much.