One possibility – some sources (e.g. Chrisvideotubedownloader) produce SRT files with the language code in the subtitle file name

e.g. XYZ.mp4 and XYZ.en.srt

These have different base names so the Humax doesn’t recognise them as belonging to each other, so rename the file.

Also, sometimes the srt file is UTF encoded, so they need stripping to plain ANSI text.

I produced a basic batch file to do this to all .en.srt files it finds in the directory – no checks, no sophistication:

rem convert
for %%f in (*.en.srt) do iconv -c -f utf-8 -t windows-1252 “%%f” >”%%f.ansi”

rem hide originals
ren *.en.srt *.utfsrt

rem rename extensions of just these files
call :stripexts en.srt.ansi
call :stripexts en.srt
ren *.en *.srt

rem delete original srts
del *.utfsrt

goto:eof

:stripexts
for %%f in (*.%1) do call :stripext “%%f”
goto:eof

:stripext
set g=%~n1
ren %1 “%g%”
goto:eof