From: Dirk Walther [walther@caltech.edu]
Sent: Thursday, June 05, 2003 11:04 AM
To: Cline, Danelle
Cc: Edgington, Duane
Subject: RE: mpeg encoding


Hi Danelle

You'll find the programs and more info for them at:
http://bmrc.berkeley.edu/frame/research/mpeg/

Duane and I had installed the programs at Telluride last year, but I guess
larvacean has been re-done since then.

The cool thing is that mpeg_encode works in a parallel system too! :-)

Best
Dirk

On Thu, 5 Jun 2003, Cline, Danelle wrote:

> Hi Dirk,
>
> Great tip. We'll give it a try. I'm not surprised run-length encoding works well on our seriously boring images...
>
> Where do I get mpeg_encode and mpeg_play? Is there an RPM or source somewhere? They are not installed on larvacean or beowulffish. Or perhaps I've misunderstood what you're referring to??
>
> Please advise.
>
> -D
>
> -----Original Message-----
> From: Edgington, Duane
> Sent: Wednesday, June 04, 2003 3:04 PM
> To: 'Dirk Walther'; Edgington, Duane; Cline, Danelle
> Subject: RE: mpeg encoding
>
>
> thanks, it sounds like some good things for us to try, especially given our problems of reliably viewing quicktime movies on linux systems.
>
> duane e.
>
> -----Original Message-----
> From: Dirk Walther [mailto:walther@caltech.edu]
> Sent: Wednesday, June 04, 2003 3:48 PM
> To: Edgington, Duane; Danelle Cline
> Subject: mpeg encoding
>
>
>
> Hi guys
>
> I just found a really good way to make movies for our demo. Duane, do you
> remember our attempts of using mpeg_encode? It looked terrible, especially
> the image quality. Well, with someone here I have found the best way to do
> it for us - by using MPEG's run-length compressing scheme without
> sacrificing image quality. The parameter file to do that is attached. The
> clips have visually the same quality as the quicktime movies we've made so
> far, but they are much smaller, e.g. 4.3 MB instead of 63 MB for a 300
> frame clip. They play with mpeg_play under Linux and Qicktime player under
> Windows - less jerking now, because the clip fits easily into the memory.
>
> Another trick that I have discovered: When you have a bunch of .ppm frames
> that you want to watch as a video, try: xv -wait 0 -wloop frame*.ppm
>
> Best
>
> Dirk
>
> ----------------------------------------------------------------------
> Dirk Walther                        \_|_/     phone: ++1-626-395-2878
> Computation and Neural Systems      /= =\       fax: ++1-626-796-8876
> California Institute of Technology (-O-O-)
> mail code 139-74                    \ v /  email: walther@caltech.edu
> Beckman Institute 12A                \_/            D.Walther@gmx.net
>
>

----------------------------------------------------------------------
Dirk Walther                        \_|_/     phone: ++1-626-395-2878
Computation and Neural Systems      /= =\       fax: ++1-626-796-8876
California Institute of Technology (-O-O-)
mail code 139-74                    \ v /  email: walther@caltech.edu
Beckman Institute 12A                \_/            D.Walther@gmx.net