A command-line python script that prints info about a midi file. Requires mido (https://pypi.org/project/mido/)

midifileinfo

#!/usr/bin/env python3

from sys import argv
from mido import MidiFile

if len(argv) < 2:
    exit("Usage: midifile [filename]")

mid = MidiFile(argv[1])
channels = set()
for track in mid.tracks:
    for event in track:
        if hasattr(event, 'channel'):
            channels.add(event.channel)
midichannels = ', '.join([str(x + 1) for x in sorted(channels)])
length = None
if mid.type != 2:
    length = mid.length
print(f"File: {mid.filename}")
print(f"Type: {mid.type}")
print(f"No. of tracks: {len(mid.tracks)}")
print(f"Used channels: {midichannels}")
if length != None:
    print(f"Length: {length:.1f} seconds")
print(f"Ticks per beat: {mid.ticks_per_beat}")