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Posts Tagged ‘kaltura’

How speech recognition speaking practice integrates with LRC activities for oral practice, assessment and ePortfolio

  1. My use of Windows7 Automated Speech recognition in 7 languages integrates with
  2. other LRC activities for oral practice, assessment and ePortfolio.
    1. A lower-key and more frequent homework assignment
    2. than our Kaltura student presentation webcam recordings NRBFS (using a URL shortener, as in http://goo.gl/NRBFS),
    3. and with better feedback than our voice-insert recordings with Sanako mV1DR,
  3. these homework assignments prepare for in-class assessments
    1. chapter tests with textbook audio recordings z2KYtk,
    2. screencast recordings of student presentations Cmd3gQ, pair conversations l6H12, and question-response midterm/final exams ZL7DG using Sanako digital audio lab.
  4. All except Kaltura (incompatible with Mahara) also produce language learner ePortfolio pieces.

Bad audio quality in Moodle Kaltura recordings on iMacs under ambient sound conditions. A running log (closed)

  1. Symptom: See title.
  2. Cause: While speakers of the 3.5 mm headset take over from the iMac speakers, when plugged in, the 3.5 mm headset micro does not disable the webcam micro. The webcam micro remains the recording source for Moodle Kaltura (mac os x.6, safari 6, flash 10).
  3. Possible solutions:
      1. 1st choice: is there a way for the admin to override this permanently?
      2. 2nd choice: is there a way for the end user to override this on a case-by-case basis?
      3. "The Califone 3066AV is compatible with both Windows and Mac audio outputs (but is not compatible with iMacs)." ("The Wow starts now!").. Do we have to tie up our boom and lavalier microphones for this?
      4. Try the flash settings by right clicking in the video window, selecting the microphone icon, then choosing the external (= non-webcam) microphone for input.
      5. kaltura flash microphone settings0kaltura flash microphone settings
      6. Fail. The real culprit is the iMacs line-in audio-in for which you need a preamp to get it to work with analog microphones. Preamps seem to start at $40, but for that I can get a PC webcam (Microphone included). 

Protected: LRC à la carte II: Choose from our start-of-term class inductions

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How to record screencasts with Kaltura in Moodle 2

    1. Go to your video assignment in Moodle: image_thumb15.
    2. Click “Record screen”, “Add”, and pass the Java security Dialogues: image
    3. The default video resolution is  640*480, but you can change this by unfolding the drop down menu:  image
    4. Full screen is recommended for a Slideshow: image
    5. To start, click the red record button: image
    6. You will get a few seconds to collect your thoughts: image
    7. After finishing your slide show, stop the recording from the taskbar icon, and stop the recording: image.
    8. From the video  window that opens:
      1. You can preview itclip_image001[4]

        And upload it which includes encoding which takes a bit of time (but not as much as encoding of webcam footage).

        clip_image002[4]

        clip_image003

    9. Finally,
      1. you can see the result in your media library
      2. image
      3. preview it once more:

        clip_image002

      4. and submit your video content from the media library.
    10. Kaltura screencasts can be used from any Java-compatible device. In the LRC, however, you can also record screencasts to files, using MS-Community Clips which you can still upload to Kaltura – extra step, though –, while maintaining compatibility with Mahara.

How a student submits prior content from “My content” into a Moodle Kaltura video assignment

  1. Go to your video assignment in Moodle: image.
  2. Click “Add media submission”: image
  3. Jump through the hoops:image
    1. switch to “my content”
    2. you have to click the “search” button to show content, leave search filed empty to show all
    3. note that there may be more
    4. you have to select a video
    5. before that, you cannot click next
  4. confirm on the next screen
  5. image
  6. You are done when you see this:  image, but hey, better press “continue” to be safe:
  7. On the next screen, you can review: image
  8. image
  9. Not so clear how you get out of there…
  10. Troubleshooting: If you run into problems, the first thing to try usually is a different web browser.

How to create screencasts of student presentations for the language learner ePortfolio in the digital audio lab

image

  1. Students can now easily video-record their own screens during class presentations – not only when using PowerPoint; instead students could demo a website, like their Facebook page.
  2. Last year, we were limited to PowerPoint’s record slideshow with timing and narration feature, and either send the PPSX (small, but requires the PowerPoint viewer) or the “Save as” video (new in PowerPoint 2010; computing intensive and large file size).
  3. Now with MS-Community Clips, screencasts are
    1. minimal effort to create (keyboard shortcut WIN+ALT+R or T; save on desktop; drag/drop into Sanako homework folder)
    2. and little effort to distribute:
      1. Students could have uploaded to a Moodle’ file upload assignment (default file size limit: 64MB) or Kaltura file upload assignment (not sure whether there is a size limit). This seems more suitable for assignments with screencasts recordings.
      2. In this instance
        1. Sanako collected the Homework files to the Sanako share,
        2. my langlabemailer emailed them as attachment (so far tested to allow for 25MB attachment size, the equivalent of 7-8 minute screencast, a hefty space to fill in L2!  We also established: 45MB is too much… Smile)  to the originating student and teacher, for review, grading –
      3. and – provided it passes muster as an attractive and significant piece – possibly for re-use in the student’s language learner ePortfolio.
  4. In addition,
    1. Before the presentations, the teacher easily collaborated on proof-reading the slide decks of individual students, by using the Sanako Remote control screen sharing feature.
    2. During the presentation, students followed more closely – which seemed to increase their attention and comprehension -, thanks to audio and screen being shared to them from the presenter, using the Sanako’s  “Model student” feature.

How to provide students with blended human/computer-automated feedback on their speaking using a dictation with speech recognition assignment screencast

  1. Teachers often feel there is never enough time for grading students’  speaking proficiency. Fortunately, we can now automate feedback on pronunciation using Windows 7 dictation with speech recognition.
  2. This feature will be  available for 7 languages on Windows 7 in the LRC, here is a demo for a reading exercise dictating German.
  3. An assignment step-by-step could look like this: Students
    1. record a screencast of their dictation,
    2. read a text to the computer in MS-Word,
    3. turn track changes on in MS-Word and correct the text (immediately or after dictation) where the computer could not recognize their speech,
    4. upload their screencast to Kaltura in Moodle.
    5. To grade the performance, the teacher has to review only at the very end of the screencast to see how many corrections the student needed to make (when it doubtabout the speech recognition validiiy, the teacher can easily jump to the screencast segment in question and, if necessary, override the speech recognition).
  4. This could be a regular assignment type since it provides the following benefits:
    1. immediate automated intelligent feedback for the student
    2. little grading overhead for the teacher, so that the teacher can concentrate her work on providing aural feedback on student recorded speech as a highlight maybe twice per term, maybe after mock exams  before a midterm and final exam
    3. some multimedia pieces demonstrating language proficiency for the student’s ePortfolio.
  5. Requirements:
    1. a quality headset (we use Sanako SLH-07Sanako SLH-07 USB)
    2. Windows 7  Enterprise/Ultimate with Language Packs,
    3. knowing how to switch the display language, (optional/recommended:) TBA:a simplified language switching facility,
    4. individual voice training data: speech recognition users have to train the computer  – once, even in a deepfrozen computer enviroinment,  since we enabled you to save this data to and restore it from a flash drive or personal network share space,
    5. a reading text (often authentic texts can be taken straight from the textbook, to fit in with the syllabus, like in this example from Treffpunkt-Deutsch 1st-year German),
    6. MS-Word with track changes
    7. screencast software (we use MS community clips)
    8. a way to submit the results to the teacher (we use Moodle with Kaltura video uploading (example for teachers, students do it similarly), but email could be sufficient depending on screencast length and attachment size allowance).