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- Path: aimla.com!usenet
- From: davido@aimla.com (David Oseas)
- Newsgroups: comp.sys.amiga.multimedia
- Subject: Re: Help playing MPEG CD
- Date: 11 Mar 1996 23:13:33 GMT
- Organization: Philips Media, Inc.
- Distribution: world
- Message-ID: <4i2c2t$331@silver.aimla.com>
- References: <313EB5BF.53F8@informatik.tu-muenchen.de>
- Reply-To: davido@aimla.com
- NNTP-Posting-Host: gneiss.aimla.com
-
- 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]
-
-