How do I extract a bmiidx CHD

[DanceGameGuy]

According to http://www.progettoemma.net/gioco.php?game=bmiidx "18th March 2006: Guru - Beatmania II DX CDROM - GQ863 A01, Beatmania II DX CDROM - GQ863-JA B01 (x2) & dongle 863A02, Beatmania II DX video CD - GQ863 A04 (x2) and Beatmania II DX substream VIDEOCD - GC983 A04 arrived late yesterday from Japan." It looks like the VCD's are contained within c44jaa03.chd or 863jaa04.chd How do I extract the CHD?

[Zorlon]

chdman it is part of the official MAME package, though as the official MAME is itself, it is a command prompt program

chdman - MAME Compressed Hunks of Data (CHD) manager 0.152 (Dec 24 2013)
Usage:
chdman info: displays information about a CHD
chdman verify: verifies a CHD's integrity
chdman createraw: create a raw CHD from the input file
chdman createhd: create a hard disk CHD from the input file
chdman createcd: create a CD CHD from the input file
chdman createld: create a laserdisc CHD from the input file
chdman extractraw: extract raw file from a CHD input file
chdman extracthd: extract raw hard disk file from a CHD input file
chdman extractcd: extract CD file from a CHD input file
chdman extractld: extract laserdisc AVI from a CHD input file
chdman copy: copy data from one CHD to another of the same type
chdman addmeta: add metadata to the CHD
chdman delmeta: remove metadata from the CHD
chdman dumpmeta: dump metadata from the CHD to stdout or to a file

For help with any command, run:
chdman help <command>

chdman extractcd -i (name of input file) -o (name of output file(no file extension))

this will create one toc file with no file ext but it is just a basic txt file and one binary file

from there I would not know, maybe the MAME site has more info

[DanceGameGuy]

F:\bmiidx\chdman extractcd -i 863jaa04.chd -o videocd

Error opening CHD file <863jaa04.chd file not found

Fatal error occurred: 1

[Zorlon]

odd worked fine for me and finds the file even if you use the wrong extract command so extracthd command will also work though it would obviously not extract correctly it would still find the file

you might want to do a dir command on it's own

[DanceGameGuy]

Can you show me the exact command line you typed in?

[Zorlon]

chdman extractcd -i 863jaa04.chd -o videocd
is correct though not got that chd myself

chdman extractcd -i gc985a04.chd -o videocd
chdman - MAME Compressed Hunks of Data (CHD) manager 0.152 (Dec 24 2013)
Output TOC: videocd
Output Data: videocd.bin
Input CH gc985a04.chd
Extracting, 10.6% complete...

[DanceGameGuy]

Looks like there is a problem with the CHD itself. Hopefully I can find an alternate source.

[Zorlon]

Best of luck