Unpack music from VVVVVV's music file!

vvvvvv_music_unpacker.py

f = open("vvvvvvmusic.vvv", 'rb')
q = f.read()

FILE_NAMES = ['0levelcomplete.ogg','1pushingonwards.ogg','2positiveforce.ogg','3potentialforanything.ogg','4passionforexploring.ogg','5intermission.ogg','6presentingvvvvvv.ogg','7gamecomplete.ogg','8predestinedfate.ogg','9positiveforcereversed.ogg','10popularpotpourri.ogg','11pipedream.ogg','12pressurecooker.ogg','13pacedenergy.ogg','14piercingthesky.ogg']

startAt = endAt = -1
musStartAt = musEndAt = -1
currentMus = 0
while True:
    oldStartAt = startAt
    startAt = q.find("OggS", oldStartAt + 1)
    endAt = q.find("OggS", startAt + 1) - 1
    if oldStartAt >= startAt:
        break
    if endAt == -2:
        endAt = len(q) - 1
    sB = ord(q[startAt+5])
    if sB == 2:
        musStartAt = startAt
    elif sB == 4:
        musEndAt = endAt
        print "Found entire Ogg between",musStartAt,musEndAt
        print "Filename: ",FILE_NAMES[currentMus]
        f2 = open(FILE_NAMES[currentMus], 'wb')
        f2.write(q[musStartAt:musEndAt])
        f2.close()
        currentMus += 1
    #print "Found OggS at",startAt,"-",endAt

Me likey

Exactly what I was looking for. Thanks!

I'm just curious here... Since "OggS" is also a magic string for internal streams, how do you distinguish between the start of an ogg file and the start of a stream? Looks like there's another magic byte involved.

I wanted to do something similar at first, but because of this issue, I ended up using hard-coded offsets straced from VVVVVV... See my blog for details.

Oggs have a special 'beginning of stream'/'end of stream' byte that's set a short bit after the OggS magic string.

There is now a 16th ogg in the music file, so the FILE_NAMES list needs an extra entry. I went with "15unknown.ogg".

Only works with python 2x!

https://gist.github.com/nike4613/1b5fd6b7bb5cc5dc94cd
That one should work even with added files.

noice!

I made a Java clone of this. Should work with Java 1.8+

Works with added files

https://gist.github.com/BenjaminUrquhart/53c5abf9599e457a291510e007e5b957

python3, works with arbitrary files:

import struct
import os

with open('vvvvvvmusic.vvv', 'rb') as f:
    data = f.read()

# find filenames

# (name, len)
headers = []
iptr = 0
while data[iptr] == 0x64:
    headers.append(list(struct.unpack("<48s4xI4x", data[iptr:iptr+0x3C])))
    headers[-1][0] = headers[-1][0][:headers[-1][0].index(b'\x00')]
    iptr += 0x3C

moffset = 0x1e00

if not os.path.exists("data/music"):
    os.makedirs("data/music")

for n, length in headers:
    with open(n.decode('ascii'), 'wb') as f:
        f.write(data[moffset:moffset+length])
        moffset += length

seeing someone from years ago solving your problem you didnt even know you had until 5 minutes ago is always the best feeling.

thanks guys

This still works as of V2.3.

Had to fix some things, and posting so people don't have to go through this again.

f = open("vvvvvvmusic.vvv", 'rb')
q = f.read()

FILE_NAMES = ['0levelcomplete.ogg','1pushingonwards.ogg','2positiveforce.ogg','3potentialforanything.ogg','4passionforexploring.ogg','5intermission.ogg','6presentingvvvvvv.ogg','7gamecomplete.ogg','8predestinedfate.ogg','9positiveforcereversed.ogg','10popularpotpourri.ogg','11pipedream.ogg','12pressurecooker.ogg','13pacedenergy.ogg','14piercingthesky.ogg','predestinedfatefinallevel.ogg']

startAt = endAt = -1
musStartAt = musEndAt = -1
currentMus = 0
while True:
    oldStartAt = startAt
    startAt = q.find(b"OggS", oldStartAt + 1)
    endAt = q.find(b"OggS", startAt + 1) - 1
    if oldStartAt >= startAt:
        break
    if endAt == -2:
        endAt = len(q) - 1
    sB = q[startAt+5]
    if sB == 2:
        musStartAt = startAt
    elif sB == 4:
        musEndAt = endAt
        print( "Found entire Ogg between",musStartAt,musEndAt)
        print( "Filename: ",FILE_NAMES[currentMus])
        f2 = open(FILE_NAMES[currentMus], 'wb')
        f2.write(q[musStartAt:musEndAt])
        f2.close()
        currentMus += 1
    print( "Found OggS at",startAt,"-",endAt)