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Tutorials. How to Capture Lectures, Broadcast and Upload Them to an External Server
Capturing and sharing lectures and other education materials is a principal aspect of the distant learning strategy. Besides lecture recording for later reuse is an effective means in particular disciplines. These operations are performed by solutions that record and broadcast video and audio feed as well as upload this material to a server. A couple of simple steps will guide through necessary settings and operations. You will be able to record a lecture itself together with the presentation provided by a lecturer from two video output sources and an audio source, broadcast it live to the interested audience and share it on the web for 24x7 access. In this example we use the Lecture Recorder x2 device from Epiphan Systems.
1. A digital camcorder on a tripod for shooting lectures.
2. A laptop which a lecturer uses to show a presentation.
3. A microphone.
4. Lecture Recorder x2.
5. DVI and S-video cables.
10/100Base-T Ethernet network access is required.
Step 1. Connections and settings
Hook up a camcorder's video output to Lecture Recorder x2’s S-video input using an adapter. Hook up the laptop's DVI output to the LR x2's DVI input. In our example a laptop is used to manage the appliance and to stream the presentation during the lecture. Connect a microphone to Lecture Recorder x2’s Audio IN port. To provide power to the Lecture Recorder x2, plug the provided PoE adapter into a 10/100Base-T Ethernet network using an Ethernet cable. Turn on Lecture Recorder x2 and the camera. As soon as Lecture Recorder x2 is connected to network, it is assigned an IP address. Now you should use the Network Discovery Utility to connect to the Web admin interface. This interface allows you to manage recording and make all necessary settings.
1. Download the Epiphan Network Discovery Utility to your laptop from the manufacturer’s website and start this program.
2. Now select Search to find the device on the network. Its name and IP address are displayed in the Name and Address fields.
3. Start web browser and browse to the IP address of Lecture Recorder x2. Enter the user name "admin". No password is required.
You have now access to Web admin interface where you can configure video and audio settings. Video settings can be configured in the Stream Setup section of the Web admin interface as explained below.
4. Click Stream Setup. In the DVI Channel section configure the DVI channel settings.
Now in the Video Channel section configure the SD channel settings. You can also specify the required picture-in-picture layout.
4. To configure audio settings, click Audio.
Step 2. Recording the lecture
Make sure that the lecture has started, the camera and microphone are working properly and the presentation is shown using a laptop. In the Web admin interface click the Recorded Files button. Specify the file type, time and size limits. Now click Start. The Lecture Recorder x2 is now recording synchronously video and audio feeds as the lecture is going on.
While the lecture is being recorded you can preview the current recording. Click the Live View button in the Web admin Interface. You will see the preview of the lecture as it is being recorded.
When the lecture is finished, click Stop.
Step 3. Uploading a lecture on server automatically
You can configure the system to automatically upload a lecture to an upload server. Lecture Recorder x2 can upload each video file after it stops recording it or upload all recorded video files with various periodicities.
In the Web admin interface find the Automatic File Upload section. Define the server type and select Enable Automatic File Upload. Now set Remote Path to the path on the upload server. Then select Apply.
Step 4. Broadcasting a lecture
It is possible to broadcast a lecture that is being recorded to remote viewers as soon as you have provided them an IP address of the broadcast and the credentials. To support larger number of viewers, especially when multiple clients are outside of the LAN, you may need to subscribe to Content Delivery Network (CDN). This service redistributes the stream for multiple viewers. Make sure all viewers know the broadcast’s IP address and credentials. They should start a web browser or a media player and use this address to immediately access the broadcast.