WMS 9 and remote playlists skips media with different codecs

Thread view:

Enable EMail Alerts

Start New Thread

Thread rating:

Daniel W - 21 Oct 2003 16:54 GMT

I create a static playlist serverside playlist (wsx) with one asf containing
a single audio stream (64kbps, Windows Media Audio V2) and a second asf
(64kbps, Windows Media Audio V7). When I stream this playlist from our
Windows 2003 Server everything is fine. But when I've do the same thing but
from a remote playlist that is dynamically generated, the streaming server
skips the second asf.

We used to have a custom application in WMS 4.1 that by using serverside
streamswitching and a station object did the same thing (created a dynamic
playlist). This worked fine even when mixing the two different codecs. We
simply added the stream format to the Station object. But now when we've
"upgraded" to WS2003 and WMS9 it started to skip. I tried to create a
nsc-file for the playlist buy I couldn't make it work. Is the solution to my
problem or is there a bug in WMS9?

/Daniel, NWR

Reply to this Message

Jorge Novillo [MS] - 24 Oct 2003 17:11 GMT

Daniel,

Can you expand on this sentence "But when I've do the same thing but
from a remote playlist that is dynamically generated, the streaming server
skips the second asf."

How are you dynamically generating the playlist? Are you referring to
using HTTPD and ASP to dynamically generate a SMIL serverside playlist?

If you were to copy the SMIL that is generated and create a static playlist
out of it, does the server stream properly? Is this a problem that only
happens when streaming from an origin server to distribution server? What
happens when you modify this remote playlist to play 2 entries that use the
same codecs instead of different codecs?

More information will help us narrow down and resolve the problem.

Thanks for using Windows Media Technologies.

Jorge Novillo [MS]
Digital Media Division

This posting is provided "AS IS" with no warranties, and confers no rights.
The use of any included script samples are subject to the terms specified at
http://www.microsoft.com/info/cpyright.htm

Reply to this Message

Daniel W - 29 Oct 2003 15:37 GMT

> How are you dynamically generating the playlist? Are you referring to
> using HTTPD and ASP to dynamically generate a SMIL serverside playlist?

Yes. I dynamically generate the SMIL on a different webserver.

> If you were to copy the SMIL that is generated and create a static playlist
> out of it, does the server stream properly?

When I create a static playlist its streams properly. The dynamically
generated playlist only contains one media-entry(windows media services
makes a request to the remote playlist after it finished playing each
media). Since I want to play at least two entries in the static playlist, I
add both of them to the playlist. So they aren't identical.

>Is this a problem that only happens when streaming from an origin server to

distribution server?

No. This happens when I stream directly from the origin server.

>What happens when you modify this remote playlist to play 2 entries that

use the

> same codecs instead of different codecs?

Then it works. It even works when the remote playlists contains two entries
with different codecs.

This works, remote playlist:
<smil>
<media src="\\NAS\music\wma\codec1.asf">
<clientData author="author" CopyRight="copyright" artist="artist1"
Title="titel1" />
</media>
<media src="\\NAS\music\wma\codec2.asf">
<clientData author="author" CopyRight="copyright" artist="artist2"
Title="titel2" />
</media>
</smil>

This doesn't, remote playlist, first request from media server:
<smil>
<media src="\\NAS\music\wma\codec1.asf">
<clientData author="author" CopyRight="copyright" artist="artist1"
Title="titel1" />
</media>
</smil>

second request:
<smil>
<media src="\\NAS\music\wma\codec2.asf">
<clientData author="author" CopyRight="copyright" artist="artist2"
Title="titel2" />
</media>
</smil>
the server skips the seconds request.

> More information will help us narrow down and resolve the problem.

I have discovered a way of going around this behaviour. When I don't include
any "clientData"-entries, the server doesn't skip. Any ideas?

/Daniel

Reply to this Message