DirectShow alternative to WME "Izo" <Izo[ at ]lack.net.il> 30.04.2007 09:21:21 I want to develop my own encoder with directshow. If I use WME in my 3GHZ XP PC, and receive the audio/video in the same PC in WMP(all ver 9.0) the delay time is in the order of seconds. Is it possibly to obtain shorter delay with my private encoder using standard directshow filters? If positive, what is a typical value for this delay time? Thanks Ronny

Re: DirectShow alternative to WME vegethalia <vegethalia[ at ]gmail.com> 30.04.2007 12:06:19 When you are setting a profile, you should specify the length of the 'buffer'. I think that you should expect to obtain AT LEAST that delay... I dont think that the technology that you use have any effect. In fact, is a matter of how the decoder works... :)

Re: DirectShow alternative to WME vegethalia <vegethalia[ at ]gmail.com> 30.04.2007 15:08:03 [Quoted Text] > Why than videoconferncing applications like all messengers(i/e. MSN > Messenger, Yahoo Messenger...) can comunicate with much less delay > Do they use different technology? Thats really a good question... =D IMHO they are sending compressed frames using some kind of a propietary algorithm. I really doubt that they use wmencoder or something similar... In fact, you can run messenger without WMEncoder installed in your machine :)

Re: DirectShow alternative to WME "Izo" <Izo[ at ]lack.net.il> 30.04.2007 15:11:31 Thanks, Why than videoconferncing applications like all messengers(i/e. MSN Messenger, Yahoo Messenger...) can comunicate with much less delay Do they use different technology? Thanks Izo "vegethalia" <vegethalia[ at ]gmail.com> wrote in message news:1177934779.578083.21130[ at ]o5g2000hsb.googlegroups.com... [Quoted Text] > When you are setting a profile, you should specify the length of the > 'buffer'. I think that you should expect to obtain AT LEAST that > delay... > > I dont think that the technology that you use have any effect. In > fact, is a matter of how the decoder works... :) > >

Re: DirectShow alternative to WME "Chris P." <msdn[ at ]chrisnet.net> 30.04.2007 15:57:34 On Mon, 30 Apr 2007 11:21:21 +0200, Izo wrote: [Quoted Text] > I want to develop my own encoder with directshow. If I use WME in my 3GHZ XP > PC, and receive the audio/video in the same PC in WMP(all ver 9.0) the delay > time is in the order of seconds. Is it possibly to obtain shorter delay with > my private encoder using standard directshow filters? > If positive, what is a typical value for this delay time? The WME is optimized for streaming over the internet with high latency, the lowest that is generally achievable with the Windows encoder is around 1 second but this is too high for conferencing. Encoders such as H.263, H.264 have been optimized for low latency. No need to write your own (the word 'insane' comes to mind here) just find another encoder/decoder pair that matches your needs. Generally there is a sliding scale of bandwidth vs CPU so you have to decide which end of the scale you want to be at for encoder complexity. -- http://www.chrisnet.net/code.htm [MS MVP for DirectShow / MediaFoundation]

RE: DirectShow alternative to WME xlthim 05.07.2007 18:58:06 I found a C# netmeeting type program on www.codeproject.com. It was almost instant, but it also runs 10 fps. There were some other H.264 you could look at. xlthim