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SageTV Studio Discussion related to the SageTV Studio application produced by SageTV. Questions, issues, problems, suggestions, etc. relating to the Studio software application should be posted here.

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  #101  
Old 03-10-2009, 09:47 AM
stuckless's Avatar
stuckless stuckless is offline
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I can't confirm this... but I think it would be something like...
Quote:
/sagex/api?c=Watch&1=mediafile:MEDIA_FILE_ID&context=UI_CONTEXT
where MEDIA_FILE_ID is the Media File Id of the file you want to play, and UI_CONTEXT is the context/client on which you want to play the file.

Hope this helps.
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  #102  
Old 03-10-2009, 11:15 AM
iolaus iolaus is offline
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Thanks Stuckless,

I managed to get it working.

Just for the record...

Code:
http://htpc_livingroom:8080/sagex/api?command=Watch&1=mediafile:600831&context=SAGETV_PROCESS_LOCAL_UI
Results in...

Code:
<error>
<message>Unknown Object Type: sage.e$e</message>
<exception>
java.lang.Exception: Unknown Object Type: sage.e$e
	at sagex.remote.builder.SimpleXmlBuilder.handleError(SimpleXmlBuilder.java:38)
	at sagex.remote.builder.SageAPIBuilder.build(SageAPIBuilder.java:56)
	at sagex.remote.api.XmlReplyEncoder.encodeReply(XmlReplyEncoder.java:26)
	at sagex.remote.api.ApiHandler.hanleRequest(ApiHandler.java:151)
	at sagex.remote.SagexServlet.doPost(SagexServlet.java:71)
	at sagex.remote.SagexServlet.doGet(SagexServlet.java:49)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)
	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)
	at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:206)
	at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
	at org.mortbay.jetty.Server.handle(Server.java:324)
	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
	at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:829)
	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:513)
	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)
Caused by: java.lang.Exception: Unknown Object Type: sage.e$e
	... 21 more
</exception>
</error>
But does play the file.

While

Code:
http://htpc_livingroom:8080/sagex/rpcXml/MediaPlayerAPI?command=Watch&1=mediafile:600831&context=SAGETV_PROCESS_LOCAL_UI
Results in...

Code:
<response>
<header>
</header>
<body>
<objectRef ref="29522508"/>
</body>
</response>
And also plays the file.
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  #103  
Old 03-10-2009, 11:30 AM
stuckless's Avatar
stuckless stuckless is offline
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Thanks, I will make a note of it and try to fix it in the next build.
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  #104  
Old 03-20-2009, 11:50 AM
iolaus iolaus is offline
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Posts: 83
Stuckless,

I'm also getting an error trying to use MediaFileAPI.GetThumbnail(). Could you please take a look at it? Also, do you know if there is any way to retrieve all media thumbnails in one big shot?

Thanks again!
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  #105  
Old 03-20-2009, 12:11 PM
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stuckless stuckless is offline
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Quote:
Originally Posted by iolaus View Post
Stuckless,

I'm also getting an error trying to use MediaFileAPI.GetThumbnail(). Could you please take a look at it? Also, do you know if there is any way to retrieve all media thumbnails in one big shot?

Thanks again!
MediaFileAPI.GetThumbnail() returns a native sage object that isn't serializable. I'm not sure how to deal with some of those object remotely. I'll add a bug for it, but I'm not sure how to fix it yet.

I'm not sure how to retrieve all thumbnails, except by retrieving all mediafiles and iterating over them.
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  #106  
Old 03-20-2009, 12:18 PM
iolaus iolaus is offline
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Quote:
Originally Posted by stuckless View Post
MediaFileAPI.GetThumbnail() returns a native sage object that isn't serializable. I'm not sure how to deal with some of those object remotely. I'll add a bug for it, but I'm not sure how to fix it yet.
Would it be possible to actually return the binary image data within a XML tag?
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  #107  
Old 03-20-2009, 12:45 PM
stuckless's Avatar
stuckless stuckless is offline
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Quote:
Originally Posted by iolaus View Post
Would it be possible to actually return the binary image data within a XML tag?
I recall looking at this a long time ago... and I didn't see any way to get access to the actual image. But it's probably doable.

Just curious, which api are you using, Java, or /sagex/rpcXml or /sagex/api ?
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  #108  
Old 03-20-2009, 03:32 PM
iolaus iolaus is offline
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A couple more things I've run into.

http://server/sagex/api?c=GetNowPlayingList always returns:
Code:
<Result/>
even when there are items in the Now Playing List

also...

http://htpc_livingroom:8080/sagex/api?c=GetPlaylists returns:
Code:
<error>
<message>Unknown Object Type: sage.cm</message>
<exception>
java.lang.Exception: Unknown Object Type: sage.cm
	at sagex.remote.builder.SimpleXmlBuilder.handleError(SimpleXmlBuilder.java:38)
	at sagex.remote.builder.SageAPIBuilder.build(SageAPIBuilder.java:56)
	at sagex.remote.builder.SageAPIBuilder.buildArray(SageAPIBuilder.java:158)
	at sagex.remote.builder.SageAPIBuilder.build(SageAPIBuilder.java:42)
	at sagex.remote.api.XmlReplyEncoder.encodeReply(XmlReplyEncoder.java:26)
	at sagex.remote.api.ApiHandler.hanleRequest(ApiHandler.java:151)
	at sagex.remote.SagexServlet.doPost(SagexServlet.java:71)
	at sagex.remote.SagexServlet.doGet(SagexServlet.java:49)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)
	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)
	at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:206)
	at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
	at org.mortbay.jetty.Server.handle(Server.java:324)
	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
	at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:829)
	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:513)
	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)
Caused by: java.lang.Exception: Unknown Object Type: sage.cm
	... 23 more
</exception>
</error>
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  #109  
Old 03-20-2009, 06:49 PM
babgvant babgvant is offline
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Quote:
Originally Posted by stuckless View Post
I recall looking at this a long time ago... and I didn't see any way to get access to the actual image. But it's probably doable.

Just curious, which api are you using, Java, or /sagex/rpcXml or /sagex/api ?
I'd vote for a base64 encoded byte array if you have time to fix it.
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  #110  
Old 03-20-2009, 07:04 PM
iolaus iolaus is offline
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Quote:
Originally Posted by stuckless View Post
Just curious, which api are you using, Java, or /sagex/rpcXml or /sagex/api ?
Sorry, I missed that bit before. I'm using sagex/api.

I have another big request. It would be fantastic if you could add some sort of &filter= parameter to the query string to limit the XML elements that are returned. I seem to be able to get Media Files from the server across my LAN at about 40/second. I think if I could limit the returned XML to only elements I'm using that figure would skyrocket.

Thanks again for all your work,
Ryan
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  #111  
Old 03-20-2009, 07:24 PM
babgvant babgvant is offline
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Quote:
Originally Posted by iolaus View Post

I have another big request. It would be fantastic if you could add some sort of &filter= parameter to the query string to limit the XML elements that are returned. I seem to be able to get Media Files from the server across my LAN at about 40/second. I think if I could limit the returned XML to only elements I'm using that figure would skyrocket.

Thanks again for all your work,
Ryan
You're probably bound by the sage api perf not bandwidth, so unless there's a huge gain in not serializing the object, you might not see any diff.
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  #112  
Old 03-21-2009, 07:22 AM
stuckless's Avatar
stuckless stuckless is offline
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Join Date: Oct 2007
Location: London, Ontario, Canada
Posts: 9,713
Quote:
Originally Posted by iolaus View Post
A couple more things I've run into.

http://server/sagex/api?c=GetNowPlayingList always returns:
Code:
<Result/>
even when there are items in the Now Playing List

also...

http://htpc_livingroom:8080/sagex/api?c=GetPlaylists returns:
Code:
<error>
<message>Unknown Object Type: sage.cm</message>
<exception>
java.lang.Exception: Unknown Object Type: sage.cm
	at sagex.remote.builder.SimpleXmlBuilder.handleError(SimpleXmlBuilder.java:38)
	at sagex.remote.builder.SageAPIBuilder.build(SageAPIBuilder.java:56)
	at sagex.remote.builder.SageAPIBuilder.buildArray(SageAPIBuilder.java:158)
	at sagex.remote.builder.SageAPIBuilder.build(SageAPIBuilder.java:42)
	at sagex.remote.api.XmlReplyEncoder.encodeReply(XmlReplyEncoder.java:26)
	at sagex.remote.api.ApiHandler.hanleRequest(ApiHandler.java:151)
	at sagex.remote.SagexServlet.doPost(SagexServlet.java:71)
	at sagex.remote.SagexServlet.doGet(SagexServlet.java:49)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)
	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)
	at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:206)
	at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
	at org.mortbay.jetty.Server.handle(Server.java:324)
	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
	at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:829)
	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:513)
	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)
Caused by: java.lang.Exception: Unknown Object Type: sage.cm
	... 23 more
</exception>
</error>

The first issue gives an empty result because you need to specify a UI context. And the second issue is a result that I haven't added a serializer for playlist objects. I've added a bug second one. The irony here is that when you call the first url with a context, then you get the same error as your second example, because the object type isn't yet supported.

So the bug is in the system... I can't say when I'll have a fix.
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  #113  
Old 03-21-2009, 07:26 AM
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stuckless stuckless is offline
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Quote:
Originally Posted by babgvant View Post
I'd vote for a base64 encoded byte array if you have time to fix it.
I've added a bug for image serialization stuff.... I'll try to do a base64 encoded string... or maybe just a url to the image??
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  #114  
Old 03-21-2009, 07:32 AM
stuckless's Avatar
stuckless stuckless is offline
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Quote:
Originally Posted by iolaus View Post
I have another big request. It would be fantastic if you could add some sort of &filter= parameter to the query string to limit the XML elements that are returned. I seem to be able to get Media Files from the server across my LAN at about 40/second. I think if I could limit the returned XML to only elements I'm using that figure would skyrocket.
Currently the api supports "chunking" the xml results, so that the results can be paged.

if you invoke the api url without any parameters, it shows you all the availble args that supported for an api call.
Code:
http://mediaserver:8081/sagex/api
start and size are there to control the starting position and # of elements that is returns when the result is an array.

If you are looking at returning all elements and then post processing them, then you might want to consider using the EvaluateExpression to have your processing done on the server, and then have the results sent back...

Something like this...
Code:
/sagex/api?c=EvaluateExpression&1=Sort(GetMediaFiles("T"),false,"Intelligent")
Have I misunderstood the request?
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  #115  
Old 03-21-2009, 08:27 AM
babgvant babgvant is offline
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Quote:
Originally Posted by stuckless View Post
I've added a bug for image serialization stuff.... I'll try to do a base64 encoded string... or maybe just a url to the image??
If the url points at your API, that would work. Otherwise the client app might not have direct access to the image (i.e. thumbnails stored in the sage root).
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  #116  
Old 03-21-2009, 05:09 PM
iolaus iolaus is offline
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Posts: 83
Quote:
Originally Posted by stuckless View Post
Currently the api supports "chunking" the xml results, so that the results can be paged.

if you invoke the api url without any parameters, it shows you all the availble args that supported for an api call.
Code:
http://mediaserver:8081/sagex/api
start and size are there to control the starting position and # of elements that is returns when the result is an array.

If you are looking at returning all elements and then post processing them, then you might want to consider using the EvaluateExpression to have your processing done on the server, and then have the results sent back...

Something like this...
Code:
/sagex/api?c=EvaluateExpression&1=Sort(GetMediaFiles("T"),false,"Intelligent")
Have I misunderstood the request?
I am using the chunking feature to avoid heap space limitations but my real problem is speed. When I make a GetMediaFiles request it can take quite a while to retrieve the results. I was assuming this was a matter of file transfer but as babgvant pointed out it may be a matter of Sage API serialization speed.

Doing a test it took 3:35 to retrieve the xml for 3700 media files using a chunk size of 50. Responses seem to be taking between 0 and 21 seconds per chunk which seems a little odd. I'm wondering if certain files or media types take significantly longer than others to serialize.

Any suggestions on how I might speed up the results when using GetMediaFiles for a large collection?

Quote:
Originally Posted by stuckless View Post
The first issue gives an empty result because you need to specify a UI context. And the second issue is a result that I haven't added a serializer for playlist objects. I've added a bug second one. The irony here is that when you call the first url with a context, then you get the same error as your second example, because the object type isn't yet supported.

So the bug is in the system... I can't say when I'll have a fix.
Thanks for looking into this, I'm excited to give it a try once it is fixed.
Last edited by iolaus; 03-21-2009 at 05:13 PM.
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  #117  
Old 03-21-2009, 06:35 PM
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stuckless stuckless is offline
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iolaus,

There has to be a reason why the response is taking so long in your case.

When i execute this command,
Code:
http://mediaserver:8081/sagex/api?command=EvaluateExpression&1=Size(GetMediaFiles())
it returns immediately with
Code:
<Result>30561</Result>
Next if i issue this command,
Code:
http://mediaserver:8081/sagex/api?command=GetMediaFiles
I get back an xml with 50 results in less than a second.

My server isn't a beefy server, it's a single core 2.4ghz with 1024mb memory.

So, i'm wondering if maybe after you issue this command if you could check the sage log file and see if there are exceptions. If the serialization process was encountering errors during the process, then that may account for the slow serialization process, since logging exception stack tracing can be a time consuming operation.
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  #118  
Old 03-22-2009, 12:18 AM
iolaus iolaus is offline
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Quote:
Originally Posted by stuckless View Post
iolaus,

There has to be a reason why the response is taking so long in your case.

When i execute this command,
Code:
http://mediaserver:8081/sagex/api?command=EvaluateExpression&1=Size(GetMediaFiles())
it returns immediately with
Code:
<Result>30561</Result>
Next if i issue this command,
Code:
http://mediaserver:8081/sagex/api?command=GetMediaFiles
I get back an xml with 50 results in less than a second.

My server isn't a beefy server, it's a single core 2.4ghz with 1024mb memory.

So, i'm wondering if maybe after you issue this command if you could check the sage log file and see if there are exceptions. If the serialization process was encountering errors during the process, then that may account for the slow serialization process, since logging exception stack tracing can be a time consuming operation.
I think I found the issue. I have about 150 songs tagged with the album name "Unsorted". For each of these files GetMediaFiles generates a <MediaFile> tag with 150 child <Airing> tags under <Album><AlbumTracks>.

In other words, each Song's <MediaFile> tag has child tags for every other song on the same album (which makes the tag sizes increase exponentially with # of tracks per album).

Would it possible to exclude data about other tracks on the album from a serialized song's <MediaFile> tag? If not, is there any other solution?
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  #119  
Old 03-22-2009, 05:47 AM
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stuckless stuckless is offline
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I've added bug for this as well...

My apologies, but currently I'm swamped with phoenix and metadata tools work, but I'll try to take a look at these serialization issues once we release the phoenix apis and the latest metadata tools.

The only alternative that I can think of, is to use the encoder=nielm option to return the xml in the sage webserver xml format. Niem's serializer works a little different and I bet it doesn't have the recursive flaw.
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  #120  
Old 03-22-2009, 09:25 AM
iolaus iolaus is offline
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Quote:
Originally Posted by stuckless View Post
I've added bug for this as well...

My apologies, but currently I'm swamped with phoenix and metadata tools work, but I'll try to take a look at these serialization issues once we release the phoenix apis and the latest metadata tools.

The only alternative that I can think of, is to use the encoder=nielm option to return the xml in the sage webserver xml format. Niem's serializer works a little different and I bet it doesn't have the recursive flaw.
Thanks for looking into it. Just for the record I think I was wrong when I said it increased exponentially. In fact, I think it increases at rate of (# of tracks)^2.

I'm not sure if it would be possible within your design but a quick fix might be to just not serialize the MediaFile.Album.AlbumTracks list. Any information in that list should be available in other MediaFiles.
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