Unreal Media Server Forum Index Unreal Media Server
ATTENTION! THIS FORUM IS READ ONLY AS OF SEPTEMBER 1 2009.

PLEASE POST QUESTIONS TO OUR NEW FORUM
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Streaming quality/bit rate

 
Post new topic   Reply to topic    Unreal Media Server Forum Index -> Live applications
View previous topic :: View next topic  
Author Message
potpal



Joined: 20 Jan 2007
Posts: 6

PostPosted: Sun Jan 28, 2007 1:26 am    Post subject: Streaming quality/bit rate Reply with quote

Hi,

If I broadcast a live stream from the media server, the ultimate bit rate delivered to the client is determined by the encoding at live server, or it is something the media server negotiates with the client machine based on client's connection speed or the client's preference.

Thanks.
Back to top
View user's profile Send private message
Admin
Site Admin


Joined: 04 Aug 2006
Posts: 488

PostPosted: Sun Jan 28, 2007 3:43 am    Post subject: Reply with quote

Nice question, and the answer is: the first, however disappointing it may look to you.

Whatever Live Server produces is streamed to every client.

The client experience depends on whether your stream is Real-Time or Buffered. In case of Real-Time, client with significantly lower connection speed than stream bitrate - such client will have choppy, frame-dropped sound/video with preference to audio;
In case of Buffered, such client will have periodic buffering but smooth playing.

Therefore most of broadcasers use two (or more) cards/cameras and create two (or more) encoding profiles for each audience type - Broadband and Modem (and more).

Admin
Back to top
View user's profile Send private message Send e-mail
Bundy



Joined: 15 Feb 2008
Posts: 10

PostPosted: Sun Apr 06, 2008 12:40 pm    Post subject: Reply with quote

This is a problem I have now is the quality, when more then 5 or so connect to the stream it starts to buffer all the time and it is not watchable. The stream setup I have is 275k buffer deliverly, but when a few connect it goes to 40k per sec with a lot of buffering, how should I fix this?

My connection speed is 8mb download and 500k upload.

Cheers
Back to top
View user's profile Send private message
chrissinc



Joined: 16 Oct 2007
Posts: 26

PostPosted: Tue Apr 08, 2008 7:15 pm    Post subject: Reply with quote

Well your problem is the 500Kbit upload speed. If only a fewpeople are watching it it's going to buffer. What we are doing is using a 10+ Mbit connection at 256Kbit video at 8 kbit mono and we can get about 70-80 people before it goes all wonky. You need more bandwidth. At that bit rate the download speed is around 35Kbytes per sec per person. 500K is about 62.5kBytes upstream So after 2 people it's going to get some buffering on there. You need real bandwidth to properly stream live. 500K isn't going to cut it.
Back to top
View user's profile Send private message
Bundy



Joined: 15 Feb 2008
Posts: 10

PostPosted: Wed Apr 09, 2008 10:50 am    Post subject: Reply with quote

Its not possible to get that sort of bandwidth from a home connection here, 500k upload is the fastest you can get. So my time has been wasted doing this . I thought the Unreal media server takes the bandwidth hit not my connection.

Cheers Chris anyway..
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    Unreal Media Server Forum Index -> Live applications All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB 2.0.6 © 2001, 2002 phpBB Group