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Re: [school-discuss] [Fwd: A solution for multimedia applications in LTSP or any Linux thin client platform]
>
> I have see your website . It is a very good idea.
> But as we know, there's no sound using Linux-based thin-client system.
This is not true. Sound is available using LTSP using either esd or nasd. see
the contrib section of http://www.ltsp.org/ for details. We use sound very
successfully with our LTSP based thin clients. Of course, it's always good to
have another option.
-Derek
> There must be some limitation for school to use, espeacially in E-learning.
> We know that e-learning must use multimedia to attract children's
> attention ,and to increase their interesting.
> To solve this problem we proudly introduce our software - MuNAS, that
> turns the X-terminal into a multimedia station.
> Allow me to brief the architecture:
>
>
>
> ------------------------------------------------------------------------
>
> The MuNAS solves the problem that the X Window system does not support
> the transformation of audio data. It makes the thin-client/server
> computing model in Linux be capable of executing /multimedia
> applications/. The audio data generated by Open Sound System (OSS/Free )
> compatible audio applications which are executed in the terminal server
> can be transferred to X-terminals. The MuNAS is designed and developed
> for the thin-client system. /With MuNAS installed, you can execute
> multimedia applications in the terminal server and listen for the sound
> from your X-terminal. Otherwise, these applications must be executed
> mutely in the thin-client architecture of Unix./
>
> * It is designed to work on multi-user operating systems: several
> users can activate the network audio system by executing their own
> audio applications in the same computer ( terminal server) and
> their audio data can be forwarded to different computers
> (X-terminals) simultaneously.
> * Existing audio applications do not need to be modified or
> recompiled, and no additional audio libraries are required.
> * The program is not restricted to any special form of audio data
> format or device type; i.e., the audio applications can
> arbitrarily define their own audio data formats and device types
> according to OSS/Free.
> * The architecture of the MuNAS allows the audio mixing of audio
> data from different processes of a user. The current version of
> MuNAS does not provide this function. The MuNAS will support it in
> the future version.
> * The MuNAS performs well, as indicated by its ability to send
> stereo, 16-bit, 44.1-kHz linear audio data to forty users in the
> same Linux terminal server simultaneously.
>
> The tested multimedia applications in Linux includes:
>
> * aRts
> It can work in MuNAS 1.0 and 1.1.
> * mpg123
> * xine
> * gtv
> * mplayer (standard media player in SuSE 8.2), gmplayer
> * mplayerplug-in for Mozilla web browser
> The video player plug-in for Quicktime and Windows Media Player
> streams using mplayer.
> * shockwave flash player plug-in for Mozilla web browser
> * realplayer 8.0, 9.0
> * alsaplayer
> * record
> It can work in MuNAS 1.0 and 1.1.
> * gnome-volume-control in RedHat 9.0
> With the gnome-volume-control or similar programs, the user can
> have his X-terminal become a karaoke player.
> * kmix
> With the kmix, the user can have his X-terminal become a
> karaoke player.
> * xmms
> * Esound
> The Esound (http://www.tux.org/~ricdude/EsounD.html) /can only
> serve a single user/. It is the limitation of Esound, not to the
> MuNAS.
> * X-Movie
>
> Several manufactures of windows terminal had installed the MuNAS in
> their X-terminals. You can find their products at the CeBIT 2004. See
> the following MuNAS complied X-terminals:
>
> 1. The /*eBox*/ of Media Stream Technologies, Inc.
> <http://www.compactpc.com.tw>
> 2. The /*Thinware AP-200*/ and */AP-533 series/* of Ace Plus
> <http://www.thinware.com.tw>.
> 3. The */EPIA 5000/*
> <http://www.mini-itx.com/store/default.asp?c=2#p2> or */EPIA 800/*
> <http://www.mini-itx.com/store/default.asp?c=2#p3> with LTSP
> <http://www.ltsp.org>.
> 4. The */EPIA 5000 <http://www.mini-itx.com/store/default.asp?c=2#p2>
> /*or */EPIA 800/*
> <http://www.mini-itx.com/store/default.asp?c=2#p3> with ThinDOM
> <http://www.thinware.com.tw/products_thindom_buildinapp.htm>.
>
> Related Links:
>
> *
> http://milkyway.bounceme.net/HOWTO/diskless-howto/Diskless-HOWTO-16.html
>
> * http://hemmerling.free.fr/html/de/linux02.html
> *
> http://www.rz.informatik.uni-muenchen.de/doku/ldp/LDP/LDP/LG/issue95/lg_bytes.html
>
> * http://www.linuxgazette.com/issue95/lg_bytes.html
>
> ------------------------------------------------------------------------
> Comparsion between eSound, NAS, aRts, and MuNAS
>
> (1) Multiuser: ALL
>
> (2) Compatible software:
> eSound: The applications which invoke the eSound library.
> NAS: The applications which invoke the NAS library.
> aRts: The applications which invoke the aRts library.
> MuNAS: All the applications which follow the standard of OSS/Free to
> send audio streams. This kind of applications use basic system calls which
> include open, read, write, and ioctl on /dev/dsp, /dev/audio, and
> /dev/mixer.
>
> (3) For /dev/mixer: The /dev/mixer in OSS/Free is with many functions
> include at least the follows:
> (a) Control the volume of two speakers
> (b) Adjust the balance of two speakers.
> This is very important for karaoke applications.
> (c) Activate the hardware audio mixer of
> micro input. This is very important for karaoke applications.
> (d) .......
> The MuNAS supports full set operations of /dev/mixer. However,
> eSound,
> NAS, and aRts cannot do this kind of operations at all.
>
> (4) Software installation in the X-terminal:
> For using eSound, NAS, and aRts, the X-terminal should install the
> corresponding libraries in it.
> However, for MuNAS-compatible X-terminal, only a program named "mrcvd"
> which is only about 20 KB needs be installed in it.
>
> If you are interested in our software, please be free to contact us for
> more information.
>
> Regards,
>
> howie YU
> Innovation Group
> Advanced Thin-client Technology Inc.
> Tel: +886-2-23581990
> FAX: +886-2-23519453
> E-mail: howie@advancedthintech.com <mailto:howie@advancedthintech.com>
> ATtech http://www.advancedthintech.com
>
> --
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>
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>
> Doug Loss All men are frauds. The only
> Data Network Coordinator difference between them is that
> Bloomsburg University some admit it. I myself deny it.
> dloss@bloomu.edu H. L. Mencken
>
>
>
>
--
Derek Dresser
http://network.gouldacademy.org/
Gould Academy
Bethel, ME 04217
(207)824-7700
"What is research but a blind date with knowledge?"
--Will Harvey
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