python - Python：从midi文件中获取正确的开始和结束

Question

我正在玩 python mido 库，我正在尝试获取笔记数据，但我不明白。

我的代码：

    # open midi file
    midi = str(MidiFile('./midi/piano/WA_Mozart_Marche_Turque_Turkish_March_fingered.mid', clip=True))
    
    # copy content of midi file to text file for easier work
    midiTextFile = open("midi.txt", "w")
    midiTextFile.write(midi)

输出的一些示例部分

 Message('note_on', channel=0, note=80, velocity=96, time=1),
    Message('note_on', channel=0, note=80, velocity=0, time=119),
    Message('note_on', channel=0, note=64, velocity=96, time=1),
    Message('note_on', channel=0, note=64, velocity=0, time=119),
    Message('note_on', channel=0, note=76, velocity=96, time=1),
    Message('note_on', channel=0, note=76, velocity=0, time=119),
    MetaMessage('time_signature', numerator=1, denominator=4, clocks_per_click=24, notated_32nd_notes_per_beat=8, time=1),
    Message('note_on', channel=0, note=69, velocity=96, time=0),
    Message('note_on', channel=0, note=81, velocity=96, time=0),
    MetaMessage('set_tempo', tempo=500000, time=479),
    Message('note_on', channel=0, note=69, velocity=0, time=0),
    Message('note_on', channel=0, note=81, velocity=0, time=0),
    MetaMessage('key_signature', key='A', time=1),
    Message('note_on', channel=0, note=69, velocity=96, time=0),
    Message('note_on', channel=0, note=69, velocity=0, time=119),
    Message('note_on', channel=0, note=81, velocity=96, time=1),
    Message('note_on', channel=0, note=81, velocity=0, time=119),
    Message('note_on', channel=0, note=71, velocity=96, time=1),
    Message('note_on', channel=0, note=71, velocity=0, time=119),
    Message('note_on', channel=0, note=83, velocity=96, time=1),
    Message('note_on', channel=0, note=83, velocity=0, time=119),
    MetaMessage('time_signature', numerator=2, denominator=4, clocks_per_click=24, notated_32nd_notes_per_beat=8, time=1),
    Message('note_on', channel=0, note=73, velocity=96, time=0),
    Message('note_on', channel=0, note=73, velocity=0, time=119),
    Message('note_on', channel=0, note=85, velocity=96, time=1),
    Message('note_on', channel=0, note=85, velocity=0, time=119),
    Message('note_on', channel=0, note=69, velocity=96, time=241),
    Message('note_on', channel=0, note=69, velocity=0, time=119),
    Message('note_on', channel=0, note=81, velocity=96, time=1),
    Message('note_on', channel=0, note=81, velocity=0, time=119),
    Message('note_on', channel=0, note=71, velocity=96, time=1),

现在我不确定几件事。这部分意味着音符 64 开始于 1 毫秒并结束于 119 毫秒？如果是的话，有没有比这更好的方法来开始和结束笔记？

Message('note_on', channel=0, note=64, velocity=96, time=1),
Message('note_on', channel=0, note=64, velocity=0, time=119),

我不明白的另一件事是midi编辑器中的歌曲有3分钟，而在这个midi文本文件中没有时间值更大time=500

谢谢你的帮助。

标签： pythonpython-3.xmidimido