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Windows Server Forum / Windows Media Server / January 2008Wallclock feature of the SSPL!
Hi! Wallclock feature of the SSPL stops working after 12h of play time. Is there some workaround to get it to work? I specify it like this: begin = "wallclock(2008-01-20T20:00:00Z);wallclock(2008-01-21T20:00:00Z)" The first times it plays and the second event no more. Thanks! Atmapuri >Hi! > [quoted text clipped - 7 lines] > >The first times it plays and the second event no more. I can't see that as a valid syntax according to the documention http://msdn2.microsoft.com/en-us/library/ms755434.aspx There's no listing of multiple attribute values for begin with a semicolon separator. Nor can you expect to combine begin and end times inside a begin attribute (there's a separate end attribute). Did you try using a pair of begin / end elements instead ? If that doesn't help, please post the complete playlist rather than an isolated snippet, because something you've not shown in the playlist is likely interrupting or completing that element. HTH Cheers - Neil ------------------------------------------------ Digital Media MVP : 2004-2008 http://mvp.support.microsoft.com/mvpfaqs Hi! >>begin = "wallclock(2008-01-20T20:00:00Z);wallclock(2008-01-21T20:00:00Z)" >> >>The first times it plays and the second event no more. > I can't see that as a valid syntax according to the documention > http://msdn2.microsoft.com/en-us/library/ms755434.aspx It is a valid feature according to the documentation, but it appears that wallclock tags the already played element and does not considers it again. This taging is shown in case of wallclock without the date information, which does not trigger on the next day (or the following days) automatically. > There's no listing of multiple attribute values for begin with a > semicolon separator. Nor can you expect to combine begin and end > times inside a begin attribute (there's a separate end attribute). > Did you try using a pair of begin / end elements instead ? Nop. Just starting at those times. The start times work fine, but I figured out that each media entry is only played once when the first wallclock event happens and not every time wallclock condition is encountered. I think that: - multiple wallclocks statements inside begin should be working fine. - wallclock statements without the date information should be repeating each day. Now I have to write a short program to generate the playlist for the next month with hundreds of entries instead of only 8, which could be written manually, if the wallclock would be working correctly. Thanks! Atmapuri >Hi! > [quoted text clipped - 5 lines] > >It is a valid feature according to the documentation, but Please provide a link to that documentation, I can't see that syntax listed anywhere. >it appears that wallclock tags the already played element and does >not considers it again. This taging is shown in case of wallclock >without the date information, which does not trigger on the next >day (or the following days) automatically. That should run if you had only a single wallclock element, following the defined syntax, which contained only a time but not a date. >> There's no listing of multiple attribute values for begin with a >> semicolon separator. Nor can you expect to combine begin and end [quoted text clipped - 8 lines] >I think that: >- multiple wallclocks statements inside begin should be working fine. No. >- wallclock statements without the date information should be >repeating each day. Yes. >Now I have to write a short program to generate the playlist >for the next month with hundreds of entries instead of only 8, >which could be written manually, if the wallclock would be >working correctly. OK so that's pretty simple using any old XML parser ;-) Cheers - Neil ------------------------------------------------ Digital Media MVP : 2004-2008 http://mvp.support.microsoft.com/mvpfaqs Hi! >>I think that: >>- multiple wallclocks statements inside begin should be working fine. > > No. There is no link on the web, but this you can read in the Help file of Windows Media services for the begin attribute: " An element can be activated relative to the timing of other elements in the playlist or by a server event. You can use the begin attribute with a list of semicolon-delimited event values to identify multiple times when the element should be played; for example begin="event1;event2;event3". Negative time values and time values that are shorter in duration than the length of the element are ignored. For complete information about the supported begin attribute values, see Timing values " >>- wallclock statements without the date information should be >>repeating each day. > > Yes. It is explicitely stated in the docs that this does not work, so that is a feature feature request :) From the wallclock help in the Windows Media Service help file: " The wallclock value is set when the playlist is loaded into memory. For broadcast publishing points, this occurs when the publishing point is started; for on-demand publishing points, this occurs when a client begins streaming the playlist. Dynamic changes to the playlist, either programmatically or through the Windows Media Playlist Editor, are ignored until the playlist is loaded into memory again. If a playlist has remained in memory for more than a day, and the wallclock value does not have a date value assigned to it, the playlist must be loaded into memory again before that wallclock value is acknowledged. For example, if a broadcast publishing point references a playlist with a media element set to begin streaming at 12:30 PM, the publishing point must be restarted before 12:30 PM the following day to honor that wallclock value again. " Please file both !!! Thanks! Atmapuri >Hi! > [quoted text clipped - 40 lines] >set to begin streaming at 12:30 PM, the publishing point must be restarted >before 12:30 PM the following day to honor that wallclock value again. OK fair point - I rememeber the second one, I wasn't aware of the first one, I guess it's time I dug out those dusty old help docs ;-) It's something I can try here over the weekend, if I can't work out what's up I'll see if there's alternative syntax. At a push I could try to ask somebody to review the help docs, but since they're shipped with systems about the only clarification that could happen would be with the online docs I guess HTH Cheers - Neil ------------------------------------------------ Digital Media MVP : 2004-2008 http://mvp.support.microsoft.com/mvpfaqs |
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