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Home Forums Silverlight Design Video and Media Silverlight transition SLOW while Windows Media Player is FAST?
6 replies. Latest Post by groatsey on August 5, 2009.
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groatsey
Member
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11 Posts
07-02-2009 3:34 AM |
Live Stream switching durations issue...
I am experiencing some issues with live stream change responsiveness.
To isolate this issue I have a simple test project which points to an OnDemand publishing point which in turn points to the playlist (below).
The xaml media element points to this (<MediaElement x:Name="VideoElement" Source="mms://server:49000/testODPP" BufferingTime="00:00:00.000"/>)
<?wsx version="1.0"?><smil> <media id = "1" dur="2" src="http://server:49000/SLLiveStream1"/> <media id = "2" dur="2" src="http://server:49000/SLLiveStream2"/> <media id = "3" dur="2" src="http://server:49000/SLLiveStream1"/> <media id = "4" dur="2" src="http://server:49000/SLLiveStream2"/></smil>
The first media item plays for 2 seconds in the Silverlight 2.0 player, however, the following media items linger for up to 8 seconds each.
Windows Media Player changes on time!
Is it possible I am missing some basic buffer configurations for live streaming?
Any help would be greatfully appreciated.
Thanks
Jamie.
Jonathan...
All-Star
24939 points
2,425 Posts
07-07-2009 3:56 AM |
Hi Jamie,
seq:
The seq element defines a time container that plays each media element in sequence, one right after the other.
Please take this sample for a test.
<?wsx version="1.0"?><smil> <seq> <media src="c:\wmpub\wmroot\Clip_1.wmv" dur="10s" /> <media src="c:\wmpub\wmroot\Clip_2.wmv" dur="10s" /> <media src="c:\wmpub\wmroot\Clip_3.wmv" dur="10s" /> </seq></smil>
By the way, if your media length is less than dur value, it will play its actual length. http://msdn.microsoft.com/en-us/library/ms744552(VS.85).aspx
For more information, please take a look at these documents.
http://msdn.microsoft.com/en-us/library/ms752505(VS.85).aspx
http://msdn.microsoft.com/en-us/library/ms752507(VS.85).aspx
Best regards,
Jonathan
07-07-2009 3:26 PM |
Thanks Jonathan,
I have read the articles you highlighted.
When I play the sample you gave me to test, using durations of '2s', it stalls and is slow to transition while Windows Mediaplayer is flawless. Is Silverlight not suitable for short transitions like this?
Jamie
07-08-2009 11:16 PM |
Currently, Silvelight only supports a subset of SSPL. Please change your list item like this and have a try.
<media id="video1" src="clip1.wmv" mce_src="clip1.wmv" clipBegin="0s" clipEnd="5s" />Please take a look at this http://msdn.microsoft.com/en-us/library/cc645037(VS.95).aspx.
Also, here is another wonderful link for IIS Soomth Streaming.
07-12-2009 10:05 AM |
Hi Jonathan
Thanks for your help.
Unfortunatley Silverlight is still very sluggish and jerky, lingering for up to 8 seconds for each change while Windows Media Player is flawless.
Q1. I have spent a great deal of time on this project and would appreciate it if you could confirm, if and when, Silverlight is meant to match Windows Media Player's flawless clip changing for the example playlist below or even basic switching between live streams:
<?wsx version="1.0"?><smil> <seq> <media id="video1" src="c:\wmpub\wmroot\racecar_300.wmv" mce_src="c:\wmpub\wmroot\racecar_300.wmv" clipBegin="0s" clipEnd="2s" /> <media id="video2" src="c:\wmpub\wmroot\snowboard_300.wmv" mce_src="c:\wmpub\wmroot\snowboard_300.wmv" clipBegin="2s" clipEnd="4s" /> <media id="video3" src="c:\wmpub\wmroot\racecar_300.wmv" mce_src="c:\wmpub\wmroot\racecar_300.wmv" clipBegin="4s" clipEnd="6s" /> <media id="video4" src="c:\wmpub\wmroot\snowboard_300.wmv" mce_src="c:\wmpub\wmroot\snowboard_300.wmv" clipBegin="6s" clipEnd="8s" /> <media id="video5" src="c:\wmpub\wmroot\racecar_300.wmv" mce_src="c:\wmpub\wmroot\racecar_300.wmv" clipBegin="8s" clipEnd="10s" /> </seq></smil>
Q2. I already have working examples of Smooth Streaming and Live Smooth Streaming. It looks like a very smart technology. The information I have to date, suggests Smooth Streaming does not support playlists/clip changes for now. If you have any further news on this then that would be great.
Best Regards
07-13-2009 3:18 AM |
groatsey:Q1. I have spent a great deal of time on this project and would appreciate it if you could confirm, if and when, Silverlight is meant to match Windows Media Player's flawless clip changing for the example playlist below or even basic switching between live streams:
How about the conditions on Silverlight 3?
groatsey:Q2. I already have working examples of Smooth Streaming and Live Smooth Streaming. It looks like a very smart technology. The information I have to date, suggests Smooth Streaming does not support playlists/clip changes for now. If you have any further news on this then that would be great.
As far as I know,playlists is not supported on Smooth Streaming.
08-05-2009 5:31 AM |
I have upgraded to Visual Studio Silverlight 3 Tools etc and purchased the Expression Studio 3 Suite as you suggested.
Can't believe that it is actually slower. On searching the net I see someone else experiencing slower playback:
http://silverlight.net/forums/p/113255/258611.aspx
Any suggestions?
Silverlight transition SLOW while Windows Media Player is FAST?