Encoder SDK - setting buffer size Charles Tam 6/1/2007 10:42:00 AM Using the Encoder SDK, how can I configure the encoding buffer size to less than one second?

Re: Encoder SDK - setting buffer size "Neil Smith [MVP Digital Media]" <neil[ at ]nospam.com> 6/1/2007 8:29:50 PM On Fri, 1 Jun 2007 03:42:00 -0700, Charles Tam <CharlesTam[ at ]discussions.microsoft.com> wrote: [Quoted Text] >Using the Encoder SDK, how can I configure the encoding buffer size to less >than one second? That buffer size is needed to reliably provide lookahead for the encoding process. It's mostly a function of the internal requirements of codecs in use. So, why would you want to do that ? Hint : If you're thinking of video conferencing, then you need a different system specifically built for low-latency codecs - such as Livemeeting, Tandberg systems, or perhaps WebEx. HTH Cheers - Neil ------------------------------------------------ Digital Media MVP : 2004-2007 http://mvp.support.microsoft.com/mvpfaqs

Re: Encoder SDK - setting buffer size Charles Tam 6/2/2007 9:25:00 PM I'm thinking of using the Encoder to implement a Web-based camera control system. I would have a look at the low-latency codecs. Thanks. "Neil Smith [MVP Digital Media]" wrote: [Quoted Text] > On Fri, 1 Jun 2007 03:42:00 -0700, Charles Tam > <CharlesTam[ at ]discussions.microsoft.com> wrote: > > >Using the Encoder SDK, how can I configure the encoding buffer size to less > >than one second? > > > That buffer size is needed to reliably provide lookahead for the > encoding process. It's mostly a function of the internal requirements > of codecs in use. So, why would you want to do that ? > > Hint : If you're thinking of video conferencing, then you need a > different system specifically built for low-latency codecs - such as > Livemeeting, Tandberg systems, or perhaps WebEx. > > HTH > Cheers - Neil > ------------------------------------------------ > Digital Media MVP : 2004-2007 > http://mvp.support.microsoft.com/mvpfaqs >

Re: Encoder SDK - setting buffer size "Neil Smith [MVP Digital Media]" <neil[ at ]nospam.com> 6/3/2007 7:21:31 PM The low latency codecs are audio only, they probably won't help. WME is really the wrong system if you *must* have zero delay / near realtime transmission of video. HTH Cheers - Neil On Sat, 2 Jun 2007 14:25:00 -0700, Charles Tam <CharlesTam[ at ]discussions.microsoft.com> wrote: [Quoted Text] >I'm thinking of using the Encoder to implement a Web-based camera control >system. I would have a look at the low-latency codecs. Thanks. > >"Neil Smith [MVP Digital Media]" wrote: > >> On Fri, 1 Jun 2007 03:42:00 -0700, Charles Tam >> <CharlesTam[ at ]discussions.microsoft.com> wrote: >> >> >Using the Encoder SDK, how can I configure the encoding buffer size to less >> >than one second? >> >> >> That buffer size is needed to reliably provide lookahead for the >> encoding process. It's mostly a function of the internal requirements >> of codecs in use. So, why would you want to do that ? >> >> Hint : If you're thinking of video conferencing, then you need a >> different system specifically built for low-latency codecs - such as >> Livemeeting, Tandberg systems, or perhaps WebEx. >> >> HTH >> Cheers - Neil >> ------------------------------------------------ >> Digital Media MVP : 2004-2007 >> http://mvp.support.microsoft.com/mvpfaqs >> ------------------------------------------------ Digital Media MVP : 2004-2007 http://mvp.support.microsoft.com/mvpfaqs

Re: Encoder SDK - setting buffer size Charles Tam 6/4/2007 10:48:00 AM Since WME is not suitable for this situation, would you recommend some low latency video encoder software? Would they be compatible with WM Player? "Neil Smith [MVP Digital Media]" wrote: [Quoted Text] > The low latency codecs are audio only, they probably won't help. > > WME is really the wrong system if you *must* have zero delay / near > realtime transmission of video. > > HTH > Cheers - Neil > > On Sat, 2 Jun 2007 14:25:00 -0700, Charles Tam > <CharlesTam[ at ]discussions.microsoft.com> wrote: > > >I'm thinking of using the Encoder to implement a Web-based camera control > >system. I would have a look at the low-latency codecs. Thanks. > > > >"Neil Smith [MVP Digital Media]" wrote: > > > >> On Fri, 1 Jun 2007 03:42:00 -0700, Charles Tam > >> <CharlesTam[ at ]discussions.microsoft.com> wrote: > >> > >> >Using the Encoder SDK, how can I configure the encoding buffer size to less > >> >than one second? > >> > >> > >> That buffer size is needed to reliably provide lookahead for the > >> encoding process. It's mostly a function of the internal requirements > >> of codecs in use. So, why would you want to do that ? > >> > >> Hint : If you're thinking of video conferencing, then you need a > >> different system specifically built for low-latency codecs - such as > >> Livemeeting, Tandberg systems, or perhaps WebEx. > >> > >> HTH > >> Cheers - Neil > >> ------------------------------------------------ > >> Digital Media MVP : 2004-2007 > >> http://mvp.support.microsoft.com/mvpfaqs > >> > ------------------------------------------------ > Digital Media MVP : 2004-2007 > http://mvp.support.microsoft.com/mvpfaqs >

Re: Encoder SDK - setting buffer size "Neil Smith [MVP Digital Media]" <neil[ at ]nospam.com> 6/4/2007 6:09:38 PM ConferenceXP is a development project which is fairly likely to make it to final product at some time. It does say "compatible with WMP" and has an SDK available http://research.microsoft.com/conferencexp/ I can't think of any open source or 3rd party programs that work with media player though. Have you considered just using WebEx ? Cheers - Neil On Mon, 4 Jun 2007 03:48:00 -0700, Charles Tam <CharlesTam[ at ]discussions.microsoft.com> wrote: [Quoted Text] >Since WME is not suitable for this situation, would you recommend some low >latency video encoder software? Would they be compatible with WM Player? > >"Neil Smith [MVP Digital Media]" wrote: > >> The low latency codecs are audio only, they probably won't help. >> >> WME is really the wrong system if you *must* have zero delay / near >> realtime transmission of video. >> >> HTH >> Cheers - Neil >> >> On Sat, 2 Jun 2007 14:25:00 -0700, Charles Tam >> <CharlesTam[ at ]discussions.microsoft.com> wrote: >> >> >I'm thinking of using the Encoder to implement a Web-based camera control >> >system. I would have a look at the low-latency codecs. Thanks. >> > >> >"Neil Smith [MVP Digital Media]" wrote: >> > >> >> On Fri, 1 Jun 2007 03:42:00 -0700, Charles Tam >> >> <CharlesTam[ at ]discussions.microsoft.com> wrote: >> >> >> >> >Using the Encoder SDK, how can I configure the encoding buffer size to less >> >> >than one second? >> >> >> >> >> >> That buffer size is needed to reliably provide lookahead for the >> >> encoding process. It's mostly a function of the internal requirements >> >> of codecs in use. So, why would you want to do that ? >> >> >> >> Hint : If you're thinking of video conferencing, then you need a >> >> different system specifically built for low-latency codecs - such as >> >> Livemeeting, Tandberg systems, or perhaps WebEx. >> >> >> >> HTH >> >> Cheers - Neil >> >> ------------------------------------------------ >> >> Digital Media MVP : 2004-2007 >> >> http://mvp.support.microsoft.com/mvpfaqs >> >> >> ------------------------------------------------ >> Digital Media MVP : 2004-2007 >> http://mvp.support.microsoft.com/mvpfaqs >> ------------------------------------------------ Digital Media MVP : 2004-2007 http://mvp.support.microsoft.com/mvpfaqs

Re: Encoder SDK - setting buffer size Charles Tam 6/4/2007 7:52:01 PM Thanks for your reply. The camera system project requires an encoder with an SDK. In the meantime, I'll have a look at ConferenceXP. By the way, I don't think Webex offers an SDK. As an alternative, could you recommend some open source or 3rd party encoders which does not require WM player? "Neil Smith [MVP Digital Media]" wrote: [Quoted Text] > ConferenceXP is a development project which is fairly likely to make > it to final product at some time. It does say "compatible with WMP" > and has an SDK available http://research.microsoft.com/conferencexp/ > > I can't think of any open source or 3rd party programs that work with > media player though. Have you considered just using WebEx ? > > Cheers - Neil > > On Mon, 4 Jun 2007 03:48:00 -0700, Charles Tam > <CharlesTam[ at ]discussions.microsoft.com> wrote: > > >Since WME is not suitable for this situation, would you recommend some low > >latency video encoder software? Would they be compatible with WM Player? > > > >"Neil Smith [MVP Digital Media]" wrote: > > > >> The low latency codecs are audio only, they probably won't help. > >> > >> WME is really the wrong system if you *must* have zero delay / near > >> realtime transmission of video. > >> > >> HTH > >> Cheers - Neil > >> > >> On Sat, 2 Jun 2007 14:25:00 -0700, Charles Tam > >> <CharlesTam[ at ]discussions.microsoft.com> wrote: > >> > >> >I'm thinking of using the Encoder to implement a Web-based camera control > >> >system. I would have a look at the low-latency codecs. Thanks. > >> > > >> >"Neil Smith [MVP Digital Media]" wrote: > >> > > >> >> On Fri, 1 Jun 2007 03:42:00 -0700, Charles Tam > >> >> <CharlesTam[ at ]discussions.microsoft.com> wrote: > >> >> > >> >> >Using the Encoder SDK, how can I configure the encoding buffer size to less > >> >> >than one second? > >> >> > >> >> > >> >> That buffer size is needed to reliably provide lookahead for the > >> >> encoding process. It's mostly a function of the internal requirements > >> >> of codecs in use. So, why would you want to do that ? > >> >> > >> >> Hint : If you're thinking of video conferencing, then you need a > >> >> different system specifically built for low-latency codecs - such as > >> >> Livemeeting, Tandberg systems, or perhaps WebEx. > >> >> > >> >> HTH > >> >> Cheers - Neil > >> >> ------------------------------------------------ > >> >> Digital Media MVP : 2004-2007 > >> >> http://mvp.support.microsoft.com/mvpfaqs > >> >> > >> ------------------------------------------------ > >> Digital Media MVP : 2004-2007 > >> http://mvp.support.microsoft.com/mvpfaqs > >> > ------------------------------------------------ > Digital Media MVP : 2004-2007 > http://mvp.support.microsoft.com/mvpfaqs >

Re: Encoder SDK - setting buffer size "Neil Smith [MVP Digital Media]" <neil[ at ]nospam.com> 6/4/2007 8:33:00 PM On Mon, 4 Jun 2007 12:52:01 -0700, Charles Tam <CharlesTam[ at ]discussions.microsoft.com> wrote: [Quoted Text] >Thanks for your reply. >The camera system project requires an encoder with an SDK. >In the meantime, I'll have a look at ConferenceXP. >By the way, I don't think Webex offers an SDK. > >As an alternative, could you recommend some open source or 3rd party >encoders which does not require WM player? VideoLAN can act as a server on any listed platform here http://www.videolan.org/vlc/features.html It's possible on windows to use DirectShow capture filters and have VLC stream that out in a range of formats. The developers Wiki is here http://wiki.videolan.org/Developers_Corner Cheers - Neil ------------------------------------------------ Digital Media MVP : 2004-2007 http://mvp.support.microsoft.com/mvpfaqs