loper

Loper · Subtitles, captions & localization

Open .mcc files on your Mac.

.mcc

CEA-708 broadcast captions: a header, then a timecode and the caption data in hex for each frame.

Loper is a free, minimal editor for macOS that opens MacCaption closed captions (.mcc) instantly and colors every part of the file, so you find the value you need at a glance and can fix it right there. No IDE, no project to load, no gray wall of text.

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NightShift_EN.mcc opened in Loper: MacCaption closed captions (.mcc) with color-coded Subtitles (SRT, VTT, LRC)
Show the file as text
File Format=MacCaption_MCC V2.0 UUID=7f2e9b40-2c1d-4c8a-9a3e-1b5f0e6d7c21Creation Program=Caption Encoder 3.2Time Code Rate=30DF 00:00:00;00	T52S524F67ZZ72F4QROO7A2E00:00:00;01	T52S524F67ZZ72F4QRFF0C94AE00:00:00;02	T52S524F67ZZ72F4QRFF0294209420

How to open .mcc files

  1. Download Loper (free, Apple silicon, signed and notarized) and move it to Applications.
  2. Double-click your .mcc file, drag it onto the Loper window, or right-click it and choose Open With › Loper.
  3. Want every .mcc file to open in Loper? Choose Loper › Make Loper the Default Editor….

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