d88-jwa@byse.nada.kth.se (Jon W{tte) (06/06/91)
ARGH !
We've had the possibility to discuss it for three days, and noone
has said a word ! Of course, on the morning of June, 3, I had a
bunch of drooling Windows idiots over to hit them on the head with
24bit movies from disk :-)
Anyone done a MPEG video compressor for QT yet ? (Real-time ? :-)
--
Jon W{tte
h+@nada.kth.se
- Speed !gourdol@imag.imag.fr (Gourdol Arnaud) (06/06/91)
In article <D88-JWA.91Jun5233120@byse.nada.kth.se> d88-jwa@byse.nada.kth.se (Jon W{tte) writes: >Anyone done a MPEG video compressor for QT yet ? (Real-time ? :-) What for? The (admitedly propietary) video compression algorithms are already very good. Besides, is MPEG already defined? I though they were still working on it? Arno. -- /=============================//===================================/ / Arno Gourdol. // On the Netland: Gourdol@imag.fr / / "A keyboard ! How quaint !" -- Scott, Star Trek / /=============================//===================================/
peirce@outpost.UUCP (Michael Peirce) (06/06/91)
In article <D88-JWA.91Jun5233120@byse.nada.kth.se>, d88-jwa@byse.nada.kth.se (Jon W{tte) writes: > > ARGH ! > > We've had the possibility to discuss it for three days, and noone > has said a word ! Of course, on the morning of June, 3, I had a > bunch of drooling Windows idiots over to hit them on the head with > 24bit movies from disk :-) I think QuickTime is "way cool" (quote from my 9 year old step daughter). Movies are great and will become important over time, but the PICT extensions are what have me excited over the short term. You can use JPEG to compress a PICT resource and still have it drawn with DrawPicture - QuickDraw does the decompression on the fly! Take that beautiful 24-bit splash screen that you've been hesitating to use because it would double the size of your app and just compress it down to 15K or so. -- Michael Peirce -- outpost!peirce@claris.com -- Peirce Software -- Suite 301, 719 Hibiscus Place -- Macintosh Programming -- San Jose, California 95117 -- & Consulting -- (408) 244-6554, AppleLink: PEIRCE
time@ice.com (Tim Endres) (06/06/91)
In article <D88-JWA.91Jun5233120@byse.nada.kth.se>, d88-jwa@byse.nada.kth.se (Jon W{tte) writes: > ARGH ! > > We've had the possibility to discuss it for three days, and noone > has said a word ! Of course, on the morning of June, 3, I had a > bunch of drooling Windows idiots over to hit them on the head with > 24bit movies from disk :-) > > Anyone done a MPEG video compressor for QT yet ? (Real-time ? :-) How does one obtain the QcuikTime modules from Apple. We have seen nothing here yet.... ------------------------------------------------------------- Tim Endres | time@ice.com ICE Engineering | uupsi!ice.com!time 8840 Main Street | Voice FAX Whitmore Lake MI. 48189 | (313) 449 8288 (313) 449 9208
captkidd@athena.mit.edu (Ivan Cavero Belaunde) (06/07/91)
In article <D88-JWA.91Jun5233120@byse.nada.kth.se> d88-jwa@byse.nada.kth.se (Jon W{tte) writes: >We've had the possibility to discuss it for three days, and noone >has said a word! Hey, give us a break, we're sorta too busy using it to discuss it at length... ;-) Seriously, though, there's a *lot* of stuff in there. Really slick architecture, guys. The big thumbs up. >Of course, on the morning of June, 3, I had a >bunch of drooling Windows idiots over to hit them on the head with >24bit movies from disk :-) Nitpick, nitpick... The AVC (Apple Video Compressor) effectively does only 16 bits. The RLE codec is screen-depth dependent though. Somehow I doubt you demoed the RLE movies (animation at 160x120 ain't really dazzling. Video *is*)... >Anyone done a MPEG video compressor for QT yet ? (Real-time ? :-) MPEG? What's the point? You can't really write real-time DCT-based algorithms on a 16MHz 020/030, and why would you write MPEG if it can't be real time (since it is for moving images after all)? (well, maybe if you're willing to settle for really small images...). Besides, the AVC is pretty good for motion and Apple's JPEG gets the job done for stills. Now if someone wants to throw hardware at it, a nice fast DSP or RISC chip might help. Hopefully Apple will rewrite and rerelease their 8*24GC-based AVC or another one which uses the 29K on the card (although I think MPEG is probably still not viable even then - you'd need better hardware like the C-Cubed chipset). -Ivan Cavero Belaunde Visualist Digital Video Applications (DiVA) Corp. Internet: captkidd@ATHENA.MIT.EDU Disclaimer: Opinions are like ani. Everybody has one.
lim@iris.ucdavis.edu (Lloyd Lim) (06/07/91)
In article <1991Jun6.191929.14421@athena.mit.edu> captkidd@athena.mit.edu (Ivan Cavero Belaunde) writes: >In article <D88-JWA.91Jun5233120@byse.nada.kth.se> d88-jwa@byse.nada.kth.se (Jon W{tte) writes: >>We've had the possibility to discuss it for three days, and noone >>has said a word! > >Hey, give us a break, we're sorta too busy using it to discuss it at >length... ;-) Seriously, though, there's a *lot* of stuff in there. >Really slick architecture, guys. The big thumbs up. And some of us aren't lucky enough to have it either. How is QuickTime being distributed now? Is it only available to registered developers? Or is it only seeded to certain developers? APDA and Internet support is great (thanks to those helpful Apple people), but I'm seriously considering shelling out the $350/year for Associates. Not having prerelease versions of System 7, IM VI, and QuickTime is getting to be a handicap for me. +++ Lloyd Lim Internet: lim@iris.eecs.ucdavis.edu America Online: LimUnltd Compuserve: 72647,660 US Mail: 215 Lysle Leach Hall, U.C. Davis, Davis, CA 95616
d88-jwa@byse.nada.kth.se (Jon W{tte) (06/07/91)
.imag.fr (Gourdol Arnaud) writes: >Anyone done a MPEG video compressor for QT yet ? (Real-time ? :-) What for? The (admitedly propietary) video compression algorithms are already very good. Besides, is MPEG already defined? I though they were still working on it? We saw JPEG before IT was defined, right ? And notice the smiley. If you want to export/import dynamic media, a proprietary algo isn't very good... -- Jon W{tte h+@nada.kth.se - Speed !
ldo@waikato.ac.nz (Lawrence D'Oliveiro, Waikato University) (06/10/91)
In article <22285@imag.imag.fr>, gourdol@imag.imag.fr (Gourdol Arnaud) questions
the need for MPEG, saying the proprietary algorithms are already very good.
The April issue of the Communications of the ACM was a multimedia special.
I'd recommend it for anybody wanting very good, yet not highly technical
overviews of what JPEG and MPEG are all about, as well as other interesting
subjects like designing video formats for interactive access, and getting
video to work over a 64K-bit channel.
One of the articles even had a performance comparison in it. As I recall,
there was no significant difference between MPEG and Intel's DVI (if that's
the proprietary algorithm you were thinking of).
Lawrence D'Oliveiro fone: +64-71-562-889
Computer Services Dept fax: +64-71-384-066
University of Waikato electric mail: ldo@waikato.ac.nz
Hamilton, New Zealand 37^ 47' 26" S, 175^ 19' 7" E, GMT+12:00
"The first phase--seeing whether data transmissions interfered with voice
communications--was a success..." -- Computerworld May 6, p55neideck@kaputt.enet.dec.com (Burkhard Neidecker-Lutz) (06/12/91)
Can anybody in the know explain a little bit more about the digitized video
component of QuickTime and the "Movie" file format ?
To cite from the QuickTime press release:
"The Movie file format is a container for [this] time-based data.
Apple is publishing the full specifications for the Movie file
format..."
Where can I get a description ?
"Video Compressor
Apple's Video Compressor--developed by Apple--allows digitized
video sequences to play back from a hard disk or CD-ROM in
real-time with no additional hardware on any Macintosh with a 68020
or higher Motorola processor.
The Video Compressor offers compression ratios ranging from 5:1
to 25:1. The video playback size is typically less than 1/4 of
the computer screen size."
What frame rate ? what image sizes ? what depth's ? Is this the same stuff
that was demonstrated at last years SIGGRAPH in Dallas ?
Burkhard Neidecker-Lutz, CEC Karlsruhe