PlayCD and mounted .iso images

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Re: PlayCD and mounted .iso images

Postby Roland » Mon Dec 03, 2018 10:48 am

nbache wrote:That's because you didn't really create them directly from music CDs. The CDFileSystem interprets an audio CD and presents it to AmigaOS as a (data) disc with AIFF files, one per track. Then, when you ask AmiDVD to create an ISO from those, it creates it as a data CD image with those files in it.


Thanks for the info, I wasn't aware of all that... It explains also why the image was not mountable on Linux. On the other hand, an image made with a CD Burner on Linux was not mountable on Amiga. What is then the right way to make an CD image on Linux, so that it works also on Amiga? Maybe DD...?
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Re: PlayCD and mounted .iso images

Postby Roland » Mon Dec 03, 2018 10:56 am

Raziel wrote:If i hex edit this .iso i can see a lot of blank space at the beginning, the next .iso from a "longplay" cd starts with data right at the first bit. Every .iso is different and so far i have not found any marker to make it distinguishable (e.g. with DefIcons)

There is, as far as i know, no program on the amiga who can produce .iso files (there are some on aminet, but none of them worked under OS4)

So, either you split up whatever you are trying to achieve (let's say backup your cds as .iso under Linux and use them under amigaos) or you code yourself a "RAW/AIFF/AUDIO CD to .iso" imager ;-)


Ok, thanks... I'm afraid I have to leave the coding for someone more qualified!-) So, Linux is the way to go.
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Re: PlayCD and mounted .iso images

Postby nbache » Mon Dec 03, 2018 11:35 am

Raziel wrote:There is, as far as i know, no program on the amiga who can produce .iso files
The DiskImage device comes with some command-line utilities. One of them is simply called DiskImage. I have successfully produced .iso images with that from a real disc (CD as well as DVD, even dual layer).

So if the purpose is simply to back up real discs and be able to play them from the image, I'd try that.

The syntax is simply:

DiskImage CD0: diskimage.iso

(taken from diskimage.guide in the package).

Then of course you may need to create that contents file. Something that might be helpful there is to make a CD ripper create the CDDB file from the real CD, since it contains all the track offsets, albeit in "frames" (each frame is 1/75 of a second).

Note: I've never tried to use my .isos for playing, I simply use them as backup to be able to burn new physical discs (with AmiDVD). Nor have I tried using the CDDB offsets to create the contents file. So YMMV ;-)

Best regards,

Niels
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Re: PlayCD and mounted .iso images

Postby Raziel » Mon Dec 03, 2018 12:02 pm

nbache wrote:
Raziel wrote:There is, as far as i know, no program on the amiga who can produce .iso files
The DiskImage device comes with some command-line utilities. One of them is simply called DiskImage. I have successfully produced .iso images with that from a real disc (CD as well as DVD, even dual layer).

So if the purpose is simply to back up real discs and be able to play them from the image, I'd try that.

The syntax is simply:

DiskImage CD0: diskimage.iso

(taken from diskimage.guide in the package).

Then of course you may need to create that contents file. Something that might be helpful there is to make a CD ripper create the CDDB file from the real CD, since it contains all the track offsets, albeit in "frames" (each frame is 1/75 of a second).

Note: I've never tried to use my .isos for playing, I simply use them as backup to be able to burn new physical discs (with AmiDVD). Nor have I tried using the CDDB offsets to create the contents file. So YMMV ;-)

Best regards,

Niels

Neat, i didn't know that, because for some reason it didn't install the c commands, rectified now, but it gives me a read error:
diskimage CD0: cd_test.iso
Sector size: 2048
Start offset: 0
End offset: 94195712
Reading...
Progress: 0.0 %
DiskImage: read error (20) - not specified

so i cannot further test if the resulting .iso would work.

Maybe it works for @Roland?
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Re: PlayCD and mounted .iso images

Postby Roland » Mon Dec 03, 2018 9:36 pm

Raziel wrote:Neat, i didn't know that, because for some reason it didn't install the c commands, rectified now, but it gives me a read error:
diskimage CD0: cd_test.iso
Sector size: 2048
Start offset: 0
End offset: 94195712
Reading...
Progress: 0.0 %
DiskImage: read error (20) - not specified

so i cannot further test if the resulting .iso would work.

Maybe it works for @Roland?


I had to disconnect my DVD drive in order to get again my second hard disk to use, so unfortunately I cannot test that now... But I did some testing on the Linux side. I found out that 'Brasero' has three alternative formats for diskimages, and I tested the '.cue' option which you got to work. It created from the CD a .bin and a .cue file. On the Amiga side, loading the .cue file Diskimage was succesful (had just to remove the Linux style path), and the .bin was mounted ok. The tracks could be accessed via amigados and they worked in MPlayer.

Also PlayCD accepted now the image via ICD0: and listed the tracks and their lengths correctly. BUT... When I tried to listen the the tracs, only noise was coming out! Looks like PlayCD cannot interpret correctly the .bin file created by Brasero...
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Re: PlayCD and mounted .iso images

Postby Raziel » Mon Dec 03, 2018 11:11 pm

I had that noise aswell.
But that was with a ."iso" created from AmiDVD.

So, it seems the "Brasero" .iso is also not a real .iso but a fs image, too bad :-/
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