MCM2IMG

Converts Maxim analog video overlay (for example, Betaflight and iNAV OSD) fonts to desired image format.

The Maxim format is documented here: https://www.maximintegrated.com/en/design/technical-documents/app-notes/4/4117.html

Useful for: previewing fonts, converting fonts for use in other applications, etc.

Usage

python3 mcm2img.py mcmfile.mcm font.bin [rawfmt] [R] [G] [B]

Example:

python3 mcm2img.py betaflight.mcm font.bin RGBA 0 255 0` for green font colour

mcmfile.mcm file can found in the Configurator for your flight controller of choice.

For Betaflight, this is at betaflight-configurator*\resources\osd\1

If rawfmt is specified, it's one of the (many) raw bitmap formats supported by Pillow: https://github.com/python-pillow/Pillow/blob/main/src/libImaging/Unpack.c#L1483 . RGBA is probably the most common thing you will want here.

Docker

The docker container will automatically convert all .mcm fonts found in /app/fonts with mcm2img.py

Volumes

Volume	Path
fonts	/app/fonts

Environment variables

Variable	Comment	Default
RGB	Used to override the colour of the converted font	255 255 255

Building

To build the docker image locally please use the following command:

docker build . -t mcm2img:latest

Running

Copy the font files (.mcm only) somewhere and execute the following command:

docker run -v ${PWD}/fonts:/app/fonts -it mcm2img:latest