🚀 go-pugleaf

In article 53F8@informatik.tu-muenchen.de, Markus Steblei <steblei@informatik.tu-muenchen.de> () writes:
>
>Samuel Mackrill wrote:
>> 
>> I have an MPEG CD which says it is CD32 compatable so I thought I
>> might get it to run on my A1200/HD/4Meg/Squirrel/CDPlayer system
>> if a little slow.
>> 
>> There is a file on the CD called AVSEQ01.DAT which is 5.5 GBytes long
>> but when I try and play it using AmiPeg it says "not an MPEG stream"
>> any hints on how to run this CD greatly appreciated.
>> 
>> I don't expect anything fast, I just want to see it working.
> 
>I have the same problem, no 'normal' Video-CD can be read by AmiPeg or any other MPEG-Player
>I have tested so far.
>Can anybody tell me why this doesn't work? I think MPEG is MPEG, difference between CD-I's
>(MPEG saved on tracks) and Video-CD's (MPEG saved in files) is clear.
>So when the stream is saved in a file, why can't AmiPeg read it?
>

I'm not familiar with AmiPeg (hey, I can't keep track of everything that's
out there), but I suspect that it can only play elementary MPEG-1 Video
streams.  The bitstreams contained on VideoCD & CD-i DigitalVideo discs
are MPEG-1 system streams, containing multiplexed audio & video.
You can obtain elemental video streams from them using a program
like "SPLITMPEG".  I haven't seen a program on the Amiga that plays
system streams other than the one that Jeff Porter wrote, which was
packed in with the CD32 FMV cartridge.

Also, you should be aware that VideoCD & CD-i DV discs use Mode 2,
Form 2 sectors (with 12 sync bytes, 4 header bytes, 8 subheader bytes,
2324 user data bytes, and 4 EDC bytes).  If the software you are using
to save the MPEG data off to a file doesn't read all 2352 bytes (most
drives and drivers will only copy 2324 or 2048 user data bytes & none
of the headers) and the decoding software is expecting them (or alternatively,
if the extraction software does copy the header bytes & the decoding
software isn't expecting them), you will get an "unrecognized stream"
error.

BTW, both CD-i DV & VideoCD discs have the MPEG data saved in .DAT
files on separate tracks.  The primary difference is that VideoCD uses
the ISO-9660 file system & CD-i uses CD-RTOS (OS-9).

---
David Oseas, (davido@aimla.com)                [CD-i, MPEG & Amiga guru] 
Sr. Software Engineer, InSight Entertainment Group
Philips Media, Los Angeles, CA                  Tel: (310) 444-6150
  [OPINIONS ARE MY OWN & DO NOT NECESSARILY REFLECT PHILIPS POLICIES]