Le jeu, 17/06/2004 à 10:26 +0300, Johnny Strom a écrit : > > Hi > > This bandwith limitation is starting to be a problem here quite soon, > I would like to be able to say that one can use GM with really high > quality and high frame rates 25/s here becouse we are starting to plan > and build fiber networks here to the home. Fiber networks can be the > next big thing and it would be nice to be able to use GM on these > networks. We need GM to be ready for the future and the future is > already here at some places. > > So I am talking about networks that can deliver 1Gbit/s. > I can add a checkbox for the limitation for 1.2. Notice that CVS doesn't permit you anymore to choose the framerate/quality as it was confusing for most users. It is replaced by a quality/speed slider. > > Craig Southeren wrote: > > On Wed, 16 Jun 2004 23:09:28 +0200 > > Kilian Krause <kk verfaction de> wrote: > > > > ..deleted > > > > > >>>Also, when I open the GM preferences, there is a form box containing a > >>>number for Maximum video bandwidth of ___ kB/s under the "Codecs... > >>>Video Codecs" tab, but I cannot seem to set it to higher than 100 kB/s > >>>even though our network connection and gatekeeper are capable of much > >>>more. > >> > >>That's an OpenH323 limitation. > > > > > > There is no such OpenH323 limitation, but it could be a GM bug. > > > > If this value is the max bandwidth that is passed to H323EndPoint, then > > you need to know that H323Endpoint expects the value in multiple of > > 100bps, so 100,000 actuallty represents 10,000,000. > > > > If you want to know why, then read on..... > > > > OpenH323 allows a user to indicate a bandwidth limit in the H323EndPoint > > in order drive the algorithm that chooses codecs when a call is started. > > For example, if the user indicates that they have a bandwidth of 50kbps, > > then OpenH323 will not choose G.711, even if it is available to both > > endpoints, because that codec requires 64kpbs. This stops users from > > getting crappy calls when they don't have the bandwidth, and it mirrors > > a similar feature in NetMeeting (and most other clients) > > > > Unfortunately, this limitation does not work well when video codecs are > > used, because it uses the bandwdith of the maximum possible video > > quality at the specified frame rate, not the dynamic bandwidth as > > determined by the actual frame rate or scene complexity. So, normally, > > we don't recommend that applications use this value - unless they are > > only using audio. > > > > Unless the application specifies a value, OpenH323 will use a default > > bandwidth of 10Mbps (i.e. Ethernet speed) which will result in selecting > > the highest bandwidth codec (and presumably also highest quality codec) > > that can be agreed upn between the two endpoints. > > > > The H.323 specification uses this value in multiples of 100 bps, so a > > value of 100,000 actually means 10 times that. Hence, a value of 100,000 > > actually means 10 x 100,000 = 10,000,000 bps > > > > Craig > > > > ----------------------------------------------------------------------- > > Craig Southeren, craigs postincrement com http://www.postincrement.com > > Post Increment - Software, Consulting and Services > > Co-founder of the only open source H.323 project > > Phone: +61 2 43654666 Fax: +61 2 43673140 Mobile: +61 417 231046 > > MSN: craig_southeren hotmail com ICQ: #86852844 > > Jabber: CraigS jabber voxgratia org Blog: http://www.southeren.com/blog > > PGP :http://www.postincrement.com/pgp.txt > > > > _______________________________________________ > > GnomeMeeting-list mailing list > > GnomeMeeting-list gnome org > > http://mail.gnome.org/mailman/listinfo/gnomemeeting-list > > _______________________________________________ > GnomeMeeting-list mailing list > GnomeMeeting-list gnome org > http://mail.gnome.org/mailman/listinfo/gnomemeeting-list -- _ Damien Sandras (o- GnomeMeeting: http://www.gnomemeeting.org/ //\ FOSDEM : http://www.fosdem.org v_/_ H.323 phone : callto:ils.seconix.com/dsandras seconix com
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