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Author Topic: can not paly some MPC file,why?  (Read 1997 times)

Superag

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can not paly some MPC file,why?
« on: July 29, 2003, 06:01:13 pm »

this file can be play by other plarers, but can not be played by mc 9.1?

why?


ftp://x-sound.com:x-music@www.x-sound.net/mpc/Modern_Talking_Back_For_Good/14_In_100_Years_(New_Version).mpc
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Cmagic

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Re: can not paly some MPC file,why?
« Reply #1 on: July 29, 2003, 10:25:02 pm »

Hi,

that's right I can't play it in MC9.0 but was able to play it in Winamp.
When you look at the file format (in MC9) it says:

MPC StreamVersion 616.0
Below Telephone
0 kbps, CBR
44.1 khz, Mid/Side Stereo
-1 Frames, 97391 Seconds

and here is what winamp file info says :

Stream Version 7.0,   Profile: 'Insane'
Bitrate: VBR  225.5 kbps
Sample Frequency:  44100 Hz
Frames:  9,184
Playtime:   3:59 (mm:ss)
Mid/Side Stereo:  enabled
Size: 6,767,025 Byte (6.45 MByte)

Strange, isn't it ? ALthough WInamp says its 225 kbps the file does not sound like an insane encoding at all. To me its rather poor quality very similar to a mpc telephone encoding.

Did you encode this one yourself  or did you get it somewhere on the web ?

I have a rather large set of mpc files (>8000 files) and it's the first time I encounter someting I cannot play on MC. Might be a problem of corrupted header or something.

C.
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Cmagic

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Re: can not paly some MPC file,why?
« Reply #2 on: July 29, 2003, 11:20:34 pm »

Ok, I think I have a clue on what's going on with your file.

I looked at the tag section it in an hex editor her is a sample of what I got:
ID3    !{TIT2      In 100 Years (New Version) TPE1      Modern Talking TALB      Back For Good (The 7th Album) TDRC      1998 TRCK      14 TDEN      2002-12-11T15:13 COMM      eng Encoded by KK TCON      Dance TENC       Exact Audio Copy   (Fast m...

As you can see (well if you're aware of it) it's the signature of an ID3V2 tag (TDRC, TRCK TPE1, etc..)
and that's probably the problem. Mpc is not designed to support ID3V2 it supports a better tagging system known as APE2 and also supports ID3V1.
The winamp plugin for mpc has some code which detects an ID3V2 tag and skips it. In the case of your file WInamp file info only reports and ID3V1 tag ?

But that's not all. I tried to remove the tags from the file and i could not succeed. Even winamp fails at removing the tags from this file (file info / remove tags).
I tried removing the tag using Helium2 but I only was able to crash Helium2, no luck.
So I guess this file is pretty much in a bad shape with an ID3V2 tag you can't remove. Maybe some byte surgery using an Hex Editor will succeed ?...


have a nice day,

Christian
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rocketsauce

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Re: can not paly some MPC file,why?
« Reply #3 on: July 29, 2003, 11:43:14 pm »

You might be able to remove it using Tag with Tag Frontend:

http://home.wanadoo.nl/~w.speek/tag.htm

Rob
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Cmagic

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Re: can not paly some MPC file,why?
« Reply #4 on: July 29, 2003, 11:54:09 pm »

Allright, I felt like a surgeon this morning !!

I loaded your file in an hex editor and removed the first bytes of the file till address 0x01104 (that's exactly 4357 bytes) The file now starts with bytes 4D 50 2B (MP+).
Saved it back as "cleaned.mpc" and her is what MC9 reports now in properties/format :

MPC StreamVersion 7.0
Insane
226 kbps, VBR
44.1 khz, Mid/Side Stereo
9184 Frames, 239 Seconds

Tag: ID3v1.1
  Artist: Modern Talking
  Album: Back For Good (The 7th Album)
  Title: In 100 Years (New Version)
  Comment: Encoded by KK
  Year: 1998
  Track: 14
  Genre: Dance

That's better isn't it ? The ID3V1 tag (at the end of the file) is still here.

Bye bye ID3V2, Hello MC9 !

So the solution to your problem is to remove the ID3V2 tag from your mpc files using either a tagger software if you find one that can handle your files (Winamp, MC and helium are out ) or an hex editor to remove it manualy. Then retags your mpc files with MC and APE2.

Ciao,

C.
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Superag

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Re: can not paly some MPC file,why?
« Reply #5 on: July 30, 2003, 07:39:45 pm »

thanks
i will try it
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