home *** CD-ROM | disk | FTP | other *** search
- Path: nntp.teleport.com!sschaem
- From: sschaem@teleport.com (Stephan Schaem)
- Newsgroups: comp.sys.amiga.programmer
- Subject: Re: Is a real good mpeg player possible on the amiga ?
- Date: 27 Jan 1996 23:49:15 GMT
- Organization: Teleport - Portland's Public Access (503) 220-1016
- Message-ID: <4eedlr$pte@maureen.teleport.com>
- References: <4e2gqu$5ca@caers3.unicaen.fr> <oj6ensqud6u.fsf@hpsrk.fc.hp.com> <4e5l6r$r5l@ulke.hiMolde.no> <4e616e$9hq@serpens.rhein.de> <DLqtLz.FFL@unx.sas.com>
- NNTP-Posting-Host: julie.teleport.com
- X-Newsreader: TIN [version 1.2 PL2]
-
- Doug Walker (walker@chang.unx.sas.com) wrote:
- : In article <4e616e$9hq@serpens.rhein.de>,
- : Michael van Elst <mlelstv@serpens.rhein.de> wrote:
- : >runee@hai.hiMolde.no (Rune Espeseth) writes:
- : >
- : >>Maybe when someone gets their finger out and start making an mpeg-player
- : >>that supports cybergraphics (24bit) speeds will start showing.
- : >>(Won't have to do c2p and color-decoding to 8 bit.)
- : >>So, anyone ? :)
- : >
- : >Most 24bit output modes in mp1.03 do not have to do c2p or
- : >color-decoding to 8bit. However, they still have to convert
- : >from 24bit YUV to 24bit RGB and transfer the data to the card.
- : >And no, these aren't significantly faster (depending on your
- : >graphics card these are even slower).
-
- : "Software" MPEG players on the PC platform gain much of their
- : speed advantage by using the video card to automatically
- : do the YUV->RGB conversion. I think it would be difficult to
- : get a reasonable frame rate and decoding quality without this
- : kind of hardware assistance, but perhaps not impossible.
-
- I think more often then not you will find PC without this
- YUV feature... Actually I'm not sure even today window95
- support all this correctly. YUV do not take the major amount
- of time, and could be overlap with write to the buffer.
-
- : 8 bit does cost you since you have to do a significant amount
- : of dithering, but as Michael points out, the bandwidth to the
- : card may cost you more than the dithering is costing, depending
- : on the card.
-
- I played with a PC and the 8bit dither mode was the fastest...
-
- Stephan
-
-