Separate text tracks (SRT, ASS) that can be turned on/off. These are easy to extract using tools like MKVToolNix.
Use Optical Character Recognition (OCR) to read the letters. Generate a timed SRT or ASS subtitle file.
Review the text for typos, then go to > Save As and save your new .srt file. Method 2: The Command-Line Approach (FFmpeg + Tesseract)

Separate text tracks (SRT, ASS) that can be turned on/off. These are easy to extract using tools like MKVToolNix.
Use Optical Character Recognition (OCR) to read the letters. Generate a timed SRT or ASS subtitle file.
Review the text for typos, then go to > Save As and save your new .srt file. Method 2: The Command-Line Approach (FFmpeg + Tesseract)
WhatsApp