[BUG] Hybrid fails to extract tx3g subtitles from a mp4 container

[Selur]

Hybrid uses:

"D:/Programs/Hybrid\64bit\MP4Box.exe" "E:\TVshows\X-Files\X-Files 08x01.mp4" -srt 4 -out "E:\TVshows\X-Files\X-Files 08x01_lang_it.srt"

which should extract the subtitle track with id 4 as srt file. Which should be correct according to https://github.com/gpac/gpac/wiki/Subtitling-with-GPAC (4.)

Do you get an error when calling that call in a Windows Command Prompt?

What confuses me is that you wrote that the extraction of the second subtitle stream fails, but according to the log the extraction of the first stream fails.

found Subtitles: 0,it,4,3,tx3g,,Timed Text ### 1,it,5,4,tx3g,,Timed Text ### 2,en,6,5,tx3g,,Timed Text

and the error states:

2020.12.28 - 19:15:38_Windows 10 Version 1909 (64bit)_2020.12.13.1 - level 9: extractorFinished 'mp4box_subtitleExtractor' for: E:\TVshows\X-Files\X-Files 08x01_lang_it_4_text.srt
2020.12.28 - 19:15:38_Windows 10 Version 1909 (64bit)_2020.12.13.1 - level 9: Couldn't extract: E:\TVshows\X-Files\X-Files 08x01_lang_it_4_text.srt

also I see no indication that the 1st stream was extracted in the debug output.
Just checked the code Hybrid checked whether the expected output file (E:\TVshows\X-Files\X-Files 08x01_lang_it_4_text.srt) exists after MP4Box finished.
If the file really exists, my guess would be that some virus scanner or similar is blocking the access to it for a short time (a few ms) after creation, which is why Hybrid can't access it and thus assumes it doesn't exist.
So if you are running a virus scanner or similar software make sure it does not scan the temp folder while Hybrid is working.

Cu Selur