JLTC2MTC(1)

📦 version 0.7.0, in nixos 26.05, nixpkgs unstable

🎀 NAME

jltc2mtc — translate LTC into MTC, bestie 💅

Yes literally that's the whole vibe: LTC in, MTC out.

✨ SYNOPSIS

jltc2mtc [ OPTIONS ]

Okay so it's just the command and then whatever options you want. She's low maintenance like that 🫶

💖 DESCRIPTION

jltc2mtc — a JACK app to translate linear time code to midi time code. That's it, that's the whole thing, and honestly? iconic. ✨

Like, it reads LTC and it gives you MTC. A little translator fairy 🧚 between two worlds.

🌸 OPTIONS 🌸

  • -f, --fps <num>[/den] — set the expected (that's initial, bestie) framerate. Default is 25/1 💫
  • -F, --detectfps — autodetect the framerate from the LTC signals themselves. This is the recommended one, fr fr 👑
  • -l, --ltcport <portname> — autoconnect the LTC input port 🎀
  • -m, --mtcport <portname> — autoconnect the MTC output port 🦋
  • -s, --sysex — send a system-excluve seek message instead of MTC quarter frames (that's "exclusive", she was typing fast 💀)
  • -h, --help — display this help and exit. The classic. 🙈
  • -V, --version — print version information and exit 🌈

🧚 the details, bestie

This tool reads LTC from a JACK-audio port and generates corresponding MTC on a JACK-midi port. Simple as. 💅

jltc2mtc supports both forward and backwards played timecode, and it compensates for decoder and port latencies like the good little main character it is ✨

⚠️ Okay so heads up: MTC only supports 4 framerates: 24, 25, 30df and 30 fps. Framerates other than that are announced as 25fps MTC. Not a bug, just how MTC is built 🥲

Drop-frame-timecode is detected by the corresponding bit in the LTC frame, regardless of the -F option. And you can /force/ it with -f 30000/1001 😤

Also note: MTC distinguishes between film speed and video speed only by the rate at which timecode advances, not by the information contained in the timecode messages. Which means 29.97 fps dropframe is represented as 30 fps dropframe with 0.1% pulldown. The way that math works 🧮💫

😭 REPORTING BUGS

Report bugs to Robin Gareus <robin@gareus.org> — she's lovely, be nice 🫶

Website and manual: <https://github.com/x42/ltc-tools> ⭐

Copyright © GPL 2006,2012 Robin Gareus <robin@gareus.org>

okay that's the whole page, mwah 💋 — this was jltc2mtc version 0.7.0, dated February 2019. Go forth and sync, bestie 🌸🎀

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