Reading images for CD VIDEO

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3 total messages Started by Mark Pulver Thu, 06 Aug 1992 02:07

Author: Mark Pulver
Date: Thu, 06 Aug 1992 02:07

10 lines
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I have a standard 12 cm Compact Disc, and also contain a video. The disc is
labeled CD VIDIO, and contains 3 audio track & 1 video track.  The audio tracks
can read with a standard CD player.

Does anyone known how, to extract the video (frame by frame) from the
disc using Sun's CDROM player.   Or does any know the storage format,
so I can decode the video data (assuming I can read the raw data).

Mark

Re: Reading images for CD VIDEO

Author: William K. McFadden
Date: Thu, 06 Aug 1992 15:44

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In article <BsJHvw.20v@research.canon.oz.au> mpulver@research.canon.oz.au (Mark Pulver) writes:
>Does anyone known how, to extract the video (frame by frame) from the
>disc using Sun's CDROM player.   Or does any know the storage format,
>so I can decode the video data (assuming I can read the raw data).

The video is encoded in an analog FM format.  The only way I know of to
read it is with a laserdisc player.  Since it is, I believe, recorded
using CLV (constant linear velocity), you would need to get an LD
player with a frame store to do frame-by-frame playback.  I have heard
of only one industrial player that can do this.  Some consumer players
can do freeze field, which might be acceptable.  You would still need
to use a frame grabber to get the video into your computer.

-- 
Bill McFadden    Tektronix, Inc.  P.O. Box 500  MS 58-639  Beaverton, OR  97077
bill@tv.tv.tek.com, ...!tektronix!tv.tv.tek.com!bill      Phone: (503) 627-6920
How can I prove I am not crazy to people who are?

Re: Reading images for CD VIDEO

#75

Author: Bob Niland
Date: Mon, 17 Aug 1992 01:16

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2062 bytes

In comp.ivideodisc, bill@thd.tv.tek.com (William K. McFadden) writes:

>> Does anyone known how, to extract the video (frame by frame) from the
>> disc using Sun's CDROM player.   Or does any know the storage format,
>> so I can decode the video data (assuming I can read the raw data).

> The video is encoded in an analog FM format.  The only way I know of to
> read it is with a laserdisc player. 

Correct.  The video portion is read at a completely different speed as well.
No CD-ROM players known to me can read CDV-5.  They would have to have a
separate composite or Y/C video output in any case, because the bit rate of
digitized video (14 Mbytes/sec or higher) is too fast for SCSI.

> Since it is, I believe, recorded using CLV (constant linear velocity), you
> would need to get an LD player with a frame store to do frame-by-frame
> playback.  I have heard of only one industrial player that can do this.

No such thing exists.  The Pioneer LD-V8000 has frame store, but can't play
5-inch media.  No consumer "combi" players have true frame store (they have
field store).

So, the only solution is to run the output of a consumer combi player into
a frame grabber.

Regards,                                              Hewlett-Packard
Bob Niland      Internet: rjn@FC.HP.COM               3404 East Harmony Road
                CompuServe:  71044,2124               Ft Collins CO 80525-9599

This article represents only the opinion[s] of its author, and is not an
official or unofficial position of, or statement by, the Hewlett-Packard
Company.  The text is provided for informational purposes only.  It is
supplied without warranty of any kind.

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