接上回Deemo提取MIDI，今天Deemo2终于可以玩了！
然后翻了一下Deemo2跟Deemo1的“钢琴音”部分是几乎完全一样的，就是说可以用几乎同样的方法提取它的MIDI轨，稍微改了下代码，又水一篇帖子。
与上次（没看过的应该先康康，比如MIDIUtil该怎么修，逃）有两点不同，
一个是谱面资源不是放apk里的，就是游戏安装完后还需要先把那2G的资源下载，然后手机插电脑，复制Android/com.rayark.deemo2/files所有文件（当然，你知道该复制哪些的话也可以不用全复制：），然后用AssetStudio打开提取其中的TextAsset文件（同建议全提取，除非你知道哪些是要提取的：），然后看到的那堆***.easy/normal/hard.json的文件就是谱面文件。
另一个是这次的sounds里面不知道为什么有null的，所以要加个if把它提出。
最后代码：（记得改RESULT_DIR和JSON_DIR的路径，其实和上次的几乎一样的，懒得优化了，逃）
import json
from midiutil.MidiFile import MIDIFile
import numpy as np
import os
import pandas as pd
RESULT_DIR = 'path\\to\\your\\result_dir'
JSON_DIR = 'path\\to\\your\\asset_exported_dir\\TextAsset\\'
# get file name
tmp = []
for _,_,f in os.walk(JSON_DIR):
tmp = f
files = []
for t in tmp:
if 'hard' in t:
files.append(t)
#print(files)
# run
werrors = []
jerrors = []
for name in files:
print('starting -> '+name)
# get notes in file
try:
with open(JSON_DIR+name,'r') as f:
datas = json.loads(f.read())
except:
jerrors.append(name)
print('get json error -> '+name)
print('------------------')
continue
speed = datas['speed']
#print(speed)
#print(list(datas))
notes = datas['notes']
#print(list(notes[0]))
sounds = []
for n in notes:
try:
try:
t = n['_time']
except:
t = 0
if n['sounds'] != None:
for s in n['sounds']:
sounds.append({'d':s['d'],'p':s['p'],'v':s['v'],'t':t})
except KeyError:
#print('!')
None
#print(len(sounds))
#print(list(notes[0]['sounds'][0]))
try:
start = sounds[0]['t']
for s in sounds:
s['t'] -= start
except:
None
# get bpm
times = []
for s in sounds:
#if s['p']<50:
times.append(s['t'])
#times = [s['t'] for s in sounds]
if(len(times)<2):
bpm = 60
else:
dt = []
for i in range(len(times))[1:]:
r = times[i]-times[i-1]
if r != 0:
dt.append(r)
gm = pd.Series(data=dt)
bpm = 60/gm.mode()[0]
while(bpm>200):
bpm /= 2
while(bpm<60):
bpm *= 2
bpm = round(bpm)
#bpm = int(bpm)
print('bpm -> '+str(bpm))
# write midi
MyMIDI = MIDIFile(1)
track = 0
time = 0
bias = float(bpm/60)
# Add track name and tempo.
MyMIDI.addTrackName(track,time,name+'_deemo')
MyMIDI.addTempo(track,time,bpm)
for s in sounds:
MyMIDI.addNote(0,0,s['p'],s['t']*bias,s['d']*bias,s['v'])
# And write it to disk.
try:
binfile = open(RESULT_DIR + name.split('.')[0]+'.mid', 'wb')
MyMIDI.writeFile(binfile)
binfile.close()
except:
werrors.append(name)
print('write file error -> '+name)
#continue
#print('finished -> '+name)
print('------------------')
print('json_errors:')
for e in jerrors:
print(e)
print('write_error:')
for e in werrors:
print(e)
附：996（Doge
