Difference between revisions of "Spoken Tutorial Technology/Creation of spoken tutorial using recordMyDesktop/English for Translation"
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Latest revision as of 17:54, 20 December 2012
| Time | Narration |
|---|---|
| 0:00 | Hello and welcome to this tutorial on “How to use recordMyDesktop”. |
| 0:05 | recordMyDesktop is a free and open source screencasting software that works on the Ubuntu Linux operating system. |
| 0:13 | For more information on Screencasting software, please watch the spoken tutorial on "How To Use Camstudio" available on this website. |
| 0:21 | I have already downloaded gtk-recordMyDesktop version 0.3.8 and installed it on my PC through the Synaptic Package Manager. |
| 0:33 | For more information on how to install software in Ubuntu Linux, please refer to the spoken tutorials on Ubuntu Linux available on this website. |
| 0:43 | Once you have successfully installed recordMyDesktop, go to the Ubuntu main menu on the top of the monitor or screen. |
| 0:51 | Click on Applications and choose Sound&Video. |
| 0:55 | This will open the context menu in which you will find the application gtk-recordMyDesktop. Click on it. |
| 01:02 | This will open the gtk-recordMyDesktop application window. |
| 01:07 | The main application window serves the purpose of defining some basic parameters of the recording, while the tray icon is primarily used for runtime control of your recordings. |
| 01:19 | Notice a new entry in your system tray icon - the red circle, representing the record button. |
| 01:27 | The system tray icon has 3 states:
|
| 01:34 | When recordMyDesktop is launched, the icon will be a record sign, i.e. the red circle. |
| 01:41 | When one starts recording, the icon will change into a square which is the Stop sign. |
| 01:46 | Observe there are 2 squares here. |
| 01:48 | This is because I am using recordMyDesktop to record this tutorial. |
| 01:51 | To pause the recording, one has to right-click on the square and the icon will change into a pause sign - two thin parallel and vertical rectangles. |
| 02:03 | To resume the recording, one has to click on the pause sign again. |
| 02:07 | Inorder to stop the recording, one has to click on the square. |
| 02:12 | Before setting any parameters, let me give you an important information. |
| 02:18 | Right-click on the red circle system tray icon. Here you have the options to show or hide the main application window. |
| 02:26 | When you start a recording session the main window will hide itself by default. |
| 02:32 | One can also choose to show the main application window by selecting this option. |
| 02:37 | “Select Area on Screen” is a way of defining the area that you wish to record. |
| 02:43 | Choosing this option will change the cursor into a crosspen with which one can draw the capture on the screen. |
| 02:51 | “Quit” option exits recordMyDesktop, exactly like the button on the main window. |
| 02:57 | Coming back to the application window, you will find the display panel to the left with a small preview window. |
| 03:06 | It depicts a scaled version of your desktop, which can be used for defining an area of recording. |
| 03:13 | To the right of this panel you will find the options to increase or decrease the Video Quality and the Sound Quality. |
| 03:22 | By default, both Video and Sound quality are set at 100. This setting gives very good playback video quality as well as audio quality. |
| 03:32 | The trade-off, however, is a larger file size. For creating Spoken Tutorials, one does not need to have 100% Video quality as it increases the file size. |
| 03:44 | Experimenting a bit with these parameters will allow you to get an optimum file size with reasonably good video and sound quality. |
| 03:53 | I will set the video quality to 50 and sound quality to 100. |
| 4:00 | This is because the size of the audio stream will occupy only a small part of your resulting file. |
| 4:08 | By default, recordMyDesktop does not record audio. To enable audio capture,one has to check the box to the left of Sound Quality. |
| 4:20 | Notice the button ADVANCED. Lets click on it. This will open another dialog box as seen here. |
| 4:28 | Visit the ADVANCED window at least once, in order to better customize the behavior of recordMyDesktop. |
| 04:35 | All options in this window are saved and applied when you close it. There are 4 options in the Main Menu of this window. |
| 04:43 | The first tab is Files. There are two options here. |
| 04:48 | There is an option to overwrite existing files, bearing the same filename in the same location, with the one you chose for your recording. |
| 04:57 | By default this option is turned off. Hence the existing files are not touched at all. Instead the new one is saved with a number postfixed at it's filename. |
| 05:10 | So, if you choose to save your recording as recording.ogv, in your home directory and there is already a file named like that, |
| 05:18 | the new one will instead get saved as recording-1.ogv. If recording-1.ogv exists ,then the new file will be named as recording-2.ogv and so on. |
| 05:31 | Let me open the Advanced tab again . If the “Overwrite Existing Files” option is turned on, existing files are deleted without any prompt. |
| 05:41 | So, one has to be careful with it. The “Working Directory” option is the location in which the temporary files are stored during the recording. |
| 05:50 | This applies only when you are not performing encoding on the fly. |
| 05:55 | The next tab is Performance. There are 5 options here. Be sure to set the “Frames per second”. |
| 06:02 | 2 frames per second is a good setting for this parameter. However, for high animation videos, set any number between 15-20 frames per second. |
| 06:12 | The “Encoding on the Fly” option causes recordMyDesktop to encode during the capture. |
| 06:19 | By default, it is off. This is useful when you don't need a high fps, or you are capturing a small area. |
| 06:28 | But if you need a smooth recording of a not-so-small area, you should turn this option off. |
| 06:34 | As mentioned earlier, when using this option, both audio and video quality must be set to 100%. |
| 06:42 | “Zero Compression” tab controls the compression of the cache. “Quick Subsampling” deals with the quality of the colorspace transformation. We will leave them as they are. |
| 06:55 | “Full shots At Every Frame” enables full captures. By default, it is turned off. |
| 07:02 | The third tab is Sound. The “Channels” option sets the number of channels in the resulting audio stream. |
| 07:10 | It can be 1 (mono) or 2(stereo). When recording from a microphone, selecting more than one channels is completely unnecessary and will only increase the size of your output file. |
| 07:24 | The “Frequency” setting, is probably the most defining factor for the audio quality of a recording. |
| 07:30 | The default is 22050, which is more than enough for speech, but if you are recording music, you might need to use 44100. |
| 07:40 | The “Device” should be set to “plughw:0,0” this is so that you have precise control of the channels and frequency values. |
| 07:54 | Only then will the audio play smoothly, without any hitches or jumps. Typing “default” in lowercase alphabets also works. |
| 08:05 | If you are using an external jack for recording, then check this box. |
| 08:11 | The channels, frequency and device fields will be disabled. These settings are now provided by the Jack server. |
| 08:19 | Before enabling Jack capture, you should make sure that a Jack server is running. |
| 08:25 | The last tab is Miscellaneous. There are various options here which are meant to be used less frequently. |
| 08:34 | An important option here is the Follow Mouse option. When checked the capture area will follow the cursor wherever it moves on the screen. |
| 08:43 | When unchecked, the capture area remains stationary inspite of cursor movement. I will give you a demo of this soon. |
| 08:53 | Let me also check outline capture area on screen. |
| 08:58 | We will close this window now. Remember, all the settings will be saved as soon as we close this window. |
| 09:06 | In the preview window of the display panel lets draw a capture area for our sample recording. |
| 09:14 | Click on the left-mouse button drag. Release the button. |
| 09:20 | You will find a small rectangle in the preview window and a larger rectangle on your screen. This is the actual capture area. |
| 09:30 | All activities within this rectangle will be captured in the demo recording. Now, lets do a demo recording. |
| 09:39 | I will click on the record icon. Hello and welcome to the demo recording using recordMyDesktop. |
| 09:48 | This is a demo recording to demonstrate how easy it is to create a spoken tutorial. |
| 09:54 | Click on Applications – Choose office - wordprocessor. Let me type DEMO here and click on the square icon to stop the recording. |
| 10:16 | recordMyDesktop is now encoding and producing a movie in 'ogv' format. |
| 10:24 | let me close the open office writer. The encoding is complete and the movie is now ready. Lets check it out. |
| 10:31 | We will find the output 'ogv' file in the Home Folder. Click on home folder, here it is,This is our demo recording. Let's play this. |
| 11:14 | So, I hope the information given in this tutorial will help you to use recordMyDesktop on your computer. |
| 11:21 | Install this free and open source software and use it to create audio-video tutorials and online visual learning modules of your own. |
| 11:30 | Spoken tutorial activity is the initiative of the ‘Talk to a Teacher’ project coordinated by http://spoken-tutorial.org, developed at IIT Bombay. |
| 11:42 | Funding for this work has come from the National Mission on Education through ICT, launched by MHRD, Government of India. |
| 11:51 | For more information, please visit http://spoken-tutorial.org/NMEICT-Intro. |
| 12:01 | This brings us to the end of this tutorial. This is Nancy from IIT Bombay saying Goodbye and Thank you for watching. |
