$ grep id: subs-chi.idx
id: zh, index: 0
$ vobsub2srt subs-chi
Error opening data file /usr/share/tesseract-ocr/4.00/tessdata/zho.traineddata
Please make sure the TESSDATA_PREFIX environment variable is set to your "tessdata" directory.
Failed loading language 'zho'
Tesseract couldn't load any languages!
Failed to initialize tesseract (OCR).
I actually opened an issue there too: https://github.com/tesseract-ocr/tesseract/issues/2995
$ grep id: subs-chi.idx id: zh, index: 0 $ vobsub2srt subs-chi Error opening data file /usr/share/tesseract-ocr/4.00/tessdata/zho.traineddata Please make sure the TESSDATA_PREFIX environment variable is set to your "tessdata" directory. Failed loading language 'zho' Tesseract couldn't load any languages! Failed to initialize tesseract (OCR).