Re: CD format
Re: CD format
- Subject: Re: CD format
- From: Andreas Monitzer <email@hidden>
- Date: Wed, 21 Nov 2001 16:21:51 +0100
On Wednesday, November 21, 2001, at 01:52 , Riccardo Santato wrote:
I would like some Apple engineers (if possible) to illuminate me on a
Well, I'm not from Apple, but at least I already played around with
Video CDs :)
curious thing: in doing the attempt of creating a Cocoa VideoCD
application, I'm getting several troubles.
The first things I've downloaded from developer.apple.com are the CD
relative examples.. well... let's start :-)
1) The "AudioCD sample" should tell me (as reading the source) that a CD
is an audio or just a data one. But if I insert a VCD, the app doesn't
give me any message at all, including errors !
Well, that's because it's neither audio nor data, it's video!
2) I've compiled several C sources for MPEG-1 video analysis, but when I
drag the .DAT format onto the application, it tells me it's impossible
even to read the file. The strange thing is that .DAT are normal MPEG-1
videos with error corrections, normally read on MacOS 9.2.1 ...
That .DAT-file is only a reference to a second track on the CD which
includes the data. The file itself is zero bytes (I got that info from
Astarte CD-Copy back in 8.x).
I'm now supposing that the main problem with VCDs doesn't stand on
QuickTime or damaged mpeg info but on the kernel of MacOS X.1.
Am I right or wrong ?
Please tell me which is the solution, because if it's a kernel or
extension problem I'll have to leave my project.
Thank you.
Maybe you need a kext that can read the video track, just like Audio CDs
are read. Another way would be to access the track directly via
/dev/diskXs2s2, maybe it's just the raw data (there has to be a spec
somewhere).
andy
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