Write metadata to mkv files as well as mp4

[4c0d3r]

Start by figuring out the command line tools to edit a video:
https://mkvtoolnix.download/doc/mkvpropedit.html

You should test adding the video to a plex library to see if metadata is read - not sure if plex/jellyfin/emby support this or not.
If they don't, not sure you should be doing this work, but carry on if you want.

Once you have the commands - maybe post them here if as a comment - incase you decide to give up.

Read some code, look at two files in namer:
1: https://github.com/ThePornDatabase/namer/blob/main/namer/ffmpeg.py
To see how to properly call external commands.

2: https://github.com/ThePornDatabase/namer/blob/main/namer/mutagen.py
To see what needs to be built for mkv's. The mutagen file supports mp4s.

Write your code with a test similar to mutagen:
https://github.com/ThePornDatabase/namer/blob/main/test/namer_mutagen.py

Update namer.py to call your new file for mkvs (around here: https://github.com/ThePornDatabase/namer/blob/main/namer/namer.py#L121)

Profit.

[4c0d3r]

Maybe doable with ffmpeg:

import ffmpeg
from pathlib import Path


def metadata(file: Path, res_file: Path):
    data = {
        'metadata:g:0': "title=My Title",
        'metadata:g:1': "artist=Me",
        'metadata:g:2': "album=X",
        'metadata:g:3': "year=2019",
    }

    stream = ffmpeg.input(str(file))
    stream = ffmpeg.output(stream, str(res_file), **data)
    stream = ffmpeg.overwrite_output(stream)
    ffmpeg.run(stream)


def main():
    file = Path(r'D:\Documents\Desktop\blank.mp4')
    metadata(file, Path(r'D:\Documents\Desktop\_blank.mp4'))

    file = Path(r'D:\Documents\Desktop\blank.mkv')
    metadata(file, Path(r'D:\Documents\Desktop\_blank.mkv'))


if __name__ == '__main__':
    main()