Virtual Classroom with JMF

Hi,
I'm doing a Virtual Classroom with the JMF. I have managed to code video broadcasting within an internal network successfully. Anyone have any ideas how get it going over the Internet or what type of components I would need?? Any help much appreciated.
My blog:
[http://student.computing.dcu.ie/blogs/kinsela7/]

Link posting removed.
Original:
Hi,
I'm doing a Virtual Classroom with the JMF. I have managed to code video broadcasting within an internal network successfully. Anyone have any ideas how get it going over the Internet or what type of components I would need?? Any help much appreciated.

Similar Messages

Why when I log in to my virtual classroom with the admin account it appears a white screen?

The meeting room is: meet18787284.adobeconnect.com
The admin account it is e******@*******.net
It appears a white screen like the image I attached
Which number can i dial to have asistance from México?
The number in the oage is 800-422-3623 i tried with 00,01,001,+1 and it didn´t connect kepp saying the number doesnt exist

The link shown in your image is to the Service Plan page for the Connect account (which most likely shows as a white page or throws an error). The server URL you listed above is active and working, but you may just need to log into the server, and then select the desired meeting room. Meeting room URLs should have something after your server URL, for example: meet18787284.adobeconnect.com/myroom
I've also edited out your email, as this is a public forum, and we don't want your information to get misused.

Webcast with JMF

I'm an under-graduate Engineering student - computer division, and I'm developing a virtual classroom application as a part of my graduation project.
I'm doing most of my project using JAVA techonologies, and I waneted to do the virtual classroom part using JAVA too.
I need to do some kind of video/audio conference using JMF, where users can join the conference, see the instrucor, and instructor's screen, also the instructor should be able to receive requests from participants to grant or deny them.
I was playing around with JMF in the last week and I found some interesting features, I also check the JMF solutions, and I ran some of the RTP stuff offered there, but what I need to do involves something like a webcast, which I could not find anything about.
Need help please
Thanks in advance
J.MAX

My latest thoughts on this (after some hacking):
RTSP server available called VODKA (Video On Demand Kicks Ass) some code is there, a reply from a developer was 'try it' so I think you could get something out of it.
Using RTP I wrote my own sockets controller to count how many connections there are (also sending setup, start, stop and teardown, like RTSP, so the 20-30% cpu of the transcoder isn't always on), you could then send video to each person who asks...) or if you are on the same subnet or VPN then you could multicast.
multiple unicasts would require datasource cloning? I am not sure... hope this helps you work some things out, my solution was to use multicasting with some custom sockets

Java.lang.NullPointerException while creating virtual classroom via Adobe Connect 9 Web Services

Hello all, I am trying to create a virtual classroom via Adobe Connect 9 Web Services with the code below.
https://XXXXXXXX.adobeconnect.com/api/xml?action=sco-update&type=virtual-classroom&name=My Virtual Classroom&folder-id=1358451232&date-begin=2014-01-02T10:00&date-end=2014-01-02T11:00
And the result below:
<results>
<status code="internal-error">
<exception>java.lang.NullPointerException</exception>
</status>
</results>
What could be the reason of this problem? I need your help.

Hi Teomanx
To create a virtual classroom, you have to give type=meeting & icon = virtual-classroom. So the correct syntax is :
https://XXXXXXXX.adobeconnect.com/api/xml?action=sco-update&type=meeting&icon=virtual-clas sroom&name=My Virtual Classroom&folder-id=1358451232&date-begin=2014-01-02T10:00&date-end=2 014-01-02T11:00.
Hope that helps.
Thank you

Detection problem on HP webcam with JMF

Hi,
I'm trying NyARtoolkit and I need to use the video stream of my HP's webcam encrusted above the screen of my laptop (a HP Pavillon tx 2670ef)
After the installation of JMF, I lunch JMStudio and I manage tu detect my webcam in : File->Preferences->Capture Devices->detect capture devices.
Then i close the windows and i do File->Capture...->I enable "use video device" and unable "use audio device" then i click on "OK" but aftewards i have an error message saying that JMF couldn't initialize the capture device...
2 students with me have the same pb...
I made some researches about this issue and i found this post
http://72.5.124.102/thread.jspa?messageID=10177842
Afterwards I've installed ManyCam and i managed to get a video capture from the virtual webcam simulated with ManyCam.
In fact, when i click on detect capture devices in JMStudio, a windows appears and i can choose "ManyCam Virtual Webcam" instead of "HP webcam".
Moreover, in the options before capturing video, the encoding is in RVB instead of YUV before with the "HP webcam".
But when i run my program i have this error :
java.lang.ArrayIndexOutOfBoundsException: 0 >= 0
     at java.util.Vector.elementAt(Unknown Source)
     at jp.nyatla.nyartoolkit.jmf.utils.JmfCaptureDeviceList.getDevice(JmfCaptureDeviceList.java:80)
     at jp.nyatla.nyartoolkit.java3d.utils.NyARSingleMarkerBehaviorHolder.<init>(NyARSingleMarkerBehaviorHolder.java:68)
     at J3DJME.NyARJava3D.<init>(NyARJava3D.java:174)
     at J3DJME.NyARJava3D.main(NyARJava3D.java:76)
I tried many other things (Quicktime with QTcap... but i didn't managed to solve this pb yet)
Coud you help to use my webcam with jmf ?
josy

You probably want to remove the crust from your web cam if you expect it to work. Most things that are encrusted aren't in the best of shape...
JMF connects to web cameras by wrapping around native interfaces. If the JMStudio isn't able to use your web cam, it could mean a number of things...your web cam isn't compliant with the version of the interfaces (VFW and DirectShow, I believe) that JMF is wrapping around, the web cam doesn't output any formats JMF can use, etc.
But if JMStudio can't use your web cam sucessfully, 99% of the time that means your web cam isn't going to work with JMF... unless you want to code support for it yourself.

Create a virtual classroom via Adobe Connect 9 Web Services

Is it possible to create a virtual classroom via Adobe Connect 9 Web Services? I could not find a way in "Using Adobe Connect 9 Web Services" documentation.

The answer of Jorma Jenning is almost correct. I investigated it myself and finally made a working solution.
The trick is that virtual classroom does not have a special type, instead it is a "meeting inside trainings folder with the icon of virtual-classroom". Kinda strange logic and to add another level of hell the "trainings folder" is the one with the type "my-courses", so, finally, we get the the following workflow:
1. Call h-ttps://example.com/api/xml?action=sco-shortcuts and filter sco-s until you find one with the type="my-courses" and remember its sco-id — this will be your folder-id.
2. call h-ttps://example.com/api/xml?action=sco-update&type=meeting&icon=virtual-classroom&name=October All Hands Meeting
&folder-id=2006258750&date-begin=2006-10-01T09:00
&date-end=2006-10-01T17:00&url-path=october
The thing with icon is important.
Note that if you call report-my-training service immediately after sco-update you won't see this virtual-classroom. This is because the default permissions do not allow that. Add yourself to the user list via permissions-update and it will appear in your training list. This is different from creating virtual classroom from web interface as there you are added as a host by default.

Virtual classroom using Stratus?

Can Stratus be used in a virtual classroom envrionment with a flash-based whiteboard, screen sharing etc? If not, is it possible to run audio-video over Stratus and - in parallel - run the virtual classroom components over Flash Media Server?
Thanks

I've made a collaboration application that demonstrates all the principles you would need to build your own flash based virtual classroom using only stratus (and a peer sharing app/site). http://www.murphysean.com/?p=37
I'll break it down a little bit:
The whiteboard could be drawn by sending continuosly the mouse position to all the other peers, and the state of the mouse position (is it drawing, perhaps a color)
The audio/video is basically built into flash for you, minus aec (Audio Echo Cancellation) because adobe is not sharing their proprietary tech with the community... See here I demonstrate sharing audio/video/chat/and file sharing (which could be implemented better)
You could also buy into the adobe service LCCS which provides everything you are talking about in an api.

Report issue on Virtual cube with services

Hi,
I'm following a how-to document to report on a virtual cube using a custom function module and everything seems to be OK except it is dumping at the following line which is included in the How To document "How Tou2026Implement a virtual InfoProvider with Services".
Both <l_s_data> and E_T_DATA are of same data types as discussed in the how-to document.
append <l_s_data> to E_T_DATA
These are the declarations which are same as HowTo document
E_T_DATA TYPE STANDARD TABLE
FIELD-SYMBOLS: <l_s_data> TYPE ANY.
Did any one face this issue. Greatly appreciate any insight into this issue. We are on BW 3.0B.
the dump i'm getting is ...
Data objects in a Unicode program are not convertible.
Error analysis
The statement    "MOVE src TO dst"   requires the operands "dst" and "src" to be comvertible.
Since this statement occurs in a Unicode program, the special convertibility rules for Unicode programs apply.
Thanks,
Hari Immadi
http://immadi.com
SEM BW Analyst

Hi,
In the debugging this is what I found out.. Any further insight?
Virtual cube has only 1 characteristic Z_CRNUM & only 1 keyfigure Z_SR
Report has only Z_CRNUM & Z_SR
<L_S_DATA> has following record & value
component      type     length     contents
K____504     P     9     1.000
S____504     C     18     16EA4D-R
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S____504 is the technical name of Z_CRNUM in virtual provider.
E_T_DATA (type standard table) has following structure with a total of 5 fields.
S____504    K____504           &KEYEND 1ROWCOUNT   Z_SR
Regards
Hari Immadi
http://immadi.com
SEM BW Analyst

Regarding Virtual InfoCube with Services

Hi All,
I have a general doubt regarding two Standard InfoCubes
We have two InfoCubes FIGL_C01, FIGL_C01, based on which we have two Virtual InfoCubes with services. FIGL_VC1, FIGL_VC2.
What is the necessity for maintaining these InfoProviders as we are already having the base InfoCubes on which we can derive the queries.
What is the basic use of Virutal InfoCube with Services.
Regards.

Hi,
SAP help says:
<i>At query runtime, the service of the virtual InfoCubes uses the data from the basic InfoCubes to determine the balance-dependent location of the financial statement items (contra items), in the financial statement version and presents the result in the query. From the technical point of view, the service determines the item indicator in the key for the financial statement items depending on the balance in the respective node in the financial statement structure.</i>
To know further infomation about why we need to find the Item indicator in finance statement refer:
http://help.sap.com/saphelp_nw04/helpdata/en/04/7b95fb42b0f94aba334c0890dbbda4/frameset.htm
Note 673564 describes exactly why the virtual Infocubes 0FIGL_VC1 and 0FIGL_VC2 were developed. (because BW cannot handle the FI fin. statement hierarchies)
With rgds,
Anil Kumar Sharma .P

Virtual infocube with services - division of suppliers in categories

Hello,
Ive a problem and the idea to solve it with a virtual infocube with services. But unfortunately I dont know if its really possible to solve it like this.
The scenario is:
Ive suppliers, turnovers, goods (which have been delivered) and different quality deficiencies. In dependence of the turnover with each supplier, they will be ranked. For the position in the ranking they get points. From this start points one have to subtract points for the different quality deficiencies. In dependence of this end-sum, the suppliers will be divided into categories. And this division should be shown in the query.
But the suppliers can vary in each run of the query in dependence of the selection in the query. And the turnover of each supplier which depends on the selected goods can vary, too. So the division into the different categories depends on the selection and is dynamic. One doesnt know this before. And so it isnt possible to save the category of each supplier in an infoprovider.
Now I want to know, if its possible to solve this with a virtual infocube with services.
I hope theres somebody who can help me. Thank you.
Susanne

Hello Susanne,
first of all, yes, it can be solved with VirtualProviders. But I wouldn't expect it to have a good performance. It depends on the number of data records we are talking about.
When you create a VirtualProvider you should make sure that the RFC Packing switch is flagged on. You can then get the selections in the tables-parameter selection with the structure bapi6200sl. Now you need to read the raw data for your selection. Either use the function module RSDRI_INFOPROV_READ or write the data into an ODS to simplify the selection.
Based on the raw data you need to do you calculation and write the data back to the table data.
For details of the implementation of the VirtualProvider and the function module you can check the SDN. These topics are also covered in my book ABAP Development in SAP BW - User Exits and BAdIs that was lately translated into English. You can find both the German and English version under <a href="http://www.sap-hefte.de/katalog/hefte/titel/gp/titelID-1256">www.sap-hefte.de</a> or <a href="http://www.sappress.com/product.cfm?account=&product=H1948">www.sappress.com</a>
Best regards

Virtual InfoCube with Services - function module parameters documentation ?

Hello,
I have been trying to use a Virtual Infocube with Services.
I have seen most of the posts in SDN, and read the documentation in http://help.sap.com/saphelp_nw04/helpdata/en/8d/2b4e3cb7f4d83ee10000000a114084/frameset.htm
I did not manage to find a precise description of the import
parameters of the Variant 2.
In particular, what is the meaning of the
i_tx_rangetab TYPE rsdri_tx_rangetab parameter. I read in the code of RS_BCT_FIGL_DATA_GET that it has to do with query columns. In the tests I did this table is alway empty.
Also, i_th_sfc gives you the list of characteristics used in the query. But it does not inform you on wether these are in the 'rows' 'free characteristics' or 'filter'. Is there a way of knowing that?
Claudio Ciardelli

Hi Claudio,
I never implemented Virtual InfoCube with services with a FM, but I know there is a couple of How To Documents about named:
- How to Reporting from External Data via Virtual InfoProvider
-How to Implement a Virtual InfoCube with Services
both with some code samples: did you read it?
Hope it helps
GFV

Virtual provider with services

Hi experts,
we have the same query on virtual cube(with services) and BW loacal cube.Both local cube and virtual cube contains the same data. But both are showing different query results.
that is virtual provider query is not displaying all the values in master data table.
for example we have 10 brands under one company code, the virtual cube query is only showing 5 among them. I would like to see all the values without any restrictions, so can you please guide me.
when i checked from tcode /listcube it is displaying all the values without any restriction.
Thanks for your time.

Hi Anupama,
My question is if u have same data in the both cubes ( virtal&Basic) u can create querry on u r basic cube only. But this not answer.
R u using same conditions on both cubes. Means In querry designer.
When u r using the virtual cube(with services) it is generally create on function module, this module properly maintainning the complete master data or not? Check it.
Hope this will help
HARI GUPTA

What is the use of Data packet dim with Virtual cube with services

Hi Friends,
Could anybody tell me what is the use of Packet dimension in Virtual cube with services , It cannot contain data persistently ,Just fetch at runtime,Then there is no Physical load happening,Then why it should be automatically created for this??
Message was edited by: Pradeep choudhari

Hi Maik,
Unit dimension will not be created automatically until and unless you have keyfigure referning units..
But my question is : Why should we have data pack dimension , which is useless in this case of Virtual cube with services.It should not be created automatically!! What do you say??

How to load data from a virtual cube with services

Hello all,
we have set up a virtual cube with service and create a BEx report to get the data from an external database. That works fine. The question is now:
Is it some how possible to "load" the data from this virtual cube with service (I know that there are not really data...) into an other InfoCube?
If that is possible, can you please give my some guidance how to set up this scenario.
Thanks in advance
Jürgen

Hi:
I don't have system before me, so try this.
I know it works for Remote Cube.
Right Click on the Cube and Select Generate Export Data Source.
If you can do this successfully, then go to Source Systems tab and select the BW. Here, Right CLick on select Replicate DataSources.
Next, go to InfoSOurces, click on Refresh. Copy the name of Virtual Cube and add 8 as a prefix and search for the infosource.
If you can see it, that means, you can load data from this cube to anywhere you want, just like you do to ODS.
ELSE.
Try and see if you can create an InfoSpoke in Virtual Cube. Tran - RSBO.
Here, you can load to a database table and then, from this table, you can create datasource, etc.
ELSE.
Create query and save it as CSV file and load it anywhere you want. This is more difficult.
Good luck
Ram Chamarthy

Error after transport of Virtual Cube with Services

Hi All,
would any body can suggest me how we can change the source system assignment in QA or Production client for virtual Cube with Services.
A virtual cube is created with Services using the settings for RFC and using the logical source system. however after transporting the same to the QA system the Logical Source System has not changed and thus it is giving error " Error occured while determining target system for the logical system" would any body can suggest me how i can change the logical source system assignment in QA system for Virtual Cube with services.
Points would be rewarded appropriately.
Cheers
Noor

Hi Noor,
Check this link, it may help you.
Re: Transport issue - Source system does not exist
Regards,
Vijay G.

Virtual Classroom with JMF

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