Hello Otto,
I reported it to Ken Pepple,Technology Director, Chief Technologist CSO
Global Desktop Practice at Sun.
Video is becoming more and more an issue in educational Sunray
implementations.
Video archives and broadcast companies are putting more and more
material online for students to use.
The current Sunray performance is not good enough to compete against
standard pc's in these situations and I can imagine that this might also
be an issue in other areas.
Another question I had is about bandwidth usage.
Will the use of XVideo extensions decrease the bandwidth usage between
the sunray and the server?
Our measurements show the following bandwidth usage for an mpeg1 video
in the JDS video player.
Half size: 9 Mb/s
Normal size: 10 Mb/s
Double size: 11 Mb/s
This is measured on Solaris 10 / SSRS 3.1 alpha / Sparc.
Thanks,
Ivar
[EMAIL PROTECTED] wrote:
One thing that is clear (it's been clear for a long time) is that
Sun Ray's video performance is weak. The reason is that the player
application ends up having to use ordinary X pixmaps to play the
video frames, and it has to send those pixmaps through the X server.
There's a ton of overhead in this process, it's just the wrong tool
for the job.
The annoying thing is that Sun Ray actually has some interesting
technology in this area; it supports the notion of having the player
application bypass the X server completely and render the video
directly to the Sun Ray. This is a huge win both for the performance
of that one video stream and for the number of concurrent streams you
can drive from one machine. The bad news is that this approach
requires getting into the guts of the player application and writing
an output codec specifically for Sun Ray. This turns out to be
impractical in the real world, it's been released only for Sun's
now-dead ShowMeTV product.
One of the things on the wish list for a future SRSS release is
to implement the XVideo extension in the Sun Ray X server. This
is the same extension THINC used, it allows the player to send
video data through the X server with far lower overhead than
using X pixmaps. It's not as good as rendering directly from
the player to the client but it has the huge advantage of being
supported by lots of players and not requiring a client-specific
codec for every player.
We're in the middle of haggling over the feature list for the
next release, so now would be an excellent time to let your Sun
contacts know what features are important to you. If lots of
people tell us that video is important then that increases the
chances of XVideo happening.
OttoM.
__
ottomeister
Disclaimer: These are my poinions. I do not speak for my employer.
_______________________________________________
SunRay-Users mailing list
[email protected]
http://www.filibeto.org/mailman/listinfo/sunray-users
