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suche Programm für live Streaming mit geringer Latenz

search program for live streaming with low latency



Frage von Jahn:
Oktober 2005

Hello,

here have just a few Programs (VisionGS, Private Webcam G4) to try offering a live stream (of Webacam) on a website. From the speed is ok, but the Programs all have a latency of about 10-14 seconds to real time. I can try out various streaming formats (mpg4, wmv7-9) synonymous with low-resolution (right down to 160x120). Is always the same. On the Internet kanns are not synonymous, as tested locally, Calculator is synonymous performant. Perhaps I have not yet found the right program or you have to take one for it Money in the hand? Program should not cost more than $ 100 (streaming only for one user or two to keep a home application, with ner latency of 2 seconds, I could still live). Hoping for answers!

Greetings from Berlin
Jahn



Antwort von universl:

Perhaps you can help the next player-vlc

Information under www.videolan.org



Antwort von Stefan:

Maybe it's synonymous a "problem" of the client page. If the client wants to have a good portion erstmal video before he starts to play ... When Quicktime Player (plugin) can be the size of the portion - I Gaub - specify.

Good luck
The fat Stefan








Antwort von Martin:

"Jahn" wrote:
From the speed is ok, but the Programs all have a latency of about 10-14 seconds to real time. I can try out various streaming formats (mpg4, wmv7-9) synonymous with low-resolution (right down to 160x120).


It is a fundamental property of high compression codecs (WMV, MPEG4), smear the image information on a large number of image frames. 10 seconds, and there are more fast together. In plain language: It can take several seconds, until the complete information of each image is transmitted. Of course, on the receiving end of that duration buffered.

I would try a less-free compressed codec, particularly one based on single images (eg motion JPEG). Is there the effect is the same?

Greeting
Martin



Antwort von comdata:

Well, I have the key frame interval to 1 second. This should begin igent after a second, the compression of the stream (and can in ner Resolutionvon eg 320x240 compression should take synonymous not too long). Could of course have to be the buffer the browser plugins for too long,'m going to try the Quicktime player. When Motion Jpeg with the transfer of individual Jpges is meant (?) - Like the solution is not here with a jpg with 320x240 is so about 20 n.groß and there is at 5 frames / s 512 kbit DSL upload already ne line dense. VLC I have to reinziehen times, perhaps even good for something ...

Nevertheless, erstmal vielen Dank!
Greeting Jahn!



Antwort von Jahn:

Have now found ne solution: The Unreal Media Server (www.umediaserver.net). Is it free for 15 connections and works with about 1-2 seconds latency is synonymous with something else to offer (user management, etc.). The only catch is that I now probably have to look nen dedicated Windows server, but the cost today is no longer synonymous indeed the world.

Greeting Jahn!




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