Language can be Python or C++.
I found https://github.com/jeffmikels/timecode_tools
They have Python files for converting SMPTE to LTC and SMPTE to MTC.
I want an open-source software which will convert LTC to MTC.
I found this: http://www.orangepi-dmx.org/orange-pi-smpte-timecode-ltc-reader-converter
Will this be useful or am I barking up the wrong tree?