Software


Many LED luminaires do not use high frequency drivers to eliminate flicker in the same way high frequency fluorescent lamp ballasts eliminate flicker. Shooting video in environments with  a lot of LED luminaires can produce video with distracting flicker. Viewers do not want to be distracted, and will switch off  if they see annoying flickering.

LED Lighting Video Recording Tips?

To eliminate flicker, for 120V 60Hz locations, the best shutter speeds to use are at multiples of 120, while at 220/230V 50Hz power locations, best shutter speeds are in multiples of 100. This Telegraph video seems to have been shot at 25 fps, which may be why a lot of annoying flicker can be seen. For flicker free video in 50Hz electrical environments, shooting at 50 or 100 fps should give best flicker free results, for 60Hz, 60 to 120 fps should give best results

For 50Hz 1/100, 1/50, 1/33, 1/25. 50 & 100 fps should = best results
For 60Hz 1/120, 1/60, 1/40, 1/30. 60 & 120 fps should = best results

This video should most likely have been recorded at 100 fps or 50 fps. In post-production there is no fix for this strobing effect. The only solution is to test other camera settings & re-shoot.

A best approach when Designing Architectural Lighting is to specify LED luminaires with high frequency, flicker free dimming drivers.

See full video & Telegraph article here: http://bit.ly/1cvuZxH

Screencasting Delivers Video Based Demonstrations & Lectures.

Teachers know the problem is not content the problem is delivery. They know what they need to teach. Their challenge is to ensure higher content retention in the time available. Screencasting allows lectures on-line providing more class time spent on homework.

Richard E. Mayer’s cognitive theory of multimedia learning suggests maximum performance occurs when visual & verbal materials are presented together. His book Multimedia Learning examines research on instructional based design and if we learn more deeply when ideas are expressed in words and pictures rather than by words alone.

Sales & Marketing’s problem is to deliver presentations, lectures, video based demonstrations and step-by-step instructions, delivering content “asynchronously”, at the audience’s convenience, regardless of their time zone, and “unattended” without a lecturer present and without the travel & expense costs. Successful screencasts are remembered and repeated.

Every organization is a learning organization, every student & employee needs to be kept up to date. Equipment and processes change, you can’t stop the factory and put everyone into a lecture hall. It is everyone’s problem. On-demand, just-in time multimedia learning is much more productive as it can focus on those who need it, when they need it.

Screencasting starts with a Script.
Successful screencasts are re-written many times. When draft is written, consider how it may be reduced to essential ideas. What will it sound like when spoken? Could three points tell the story in 140 characters? Guy Kawasaki uses a 10-20-30 Rule of 10 Slides, 20 Minutes and a Font Size 30 for start-up funding presentations.

Editing allows segment distillation by cutting recorded elements and allows voice over & background music adjustments. Graphic call-outs and zoom & pan effects can be added to call attention to specific information.

Rendering edited projects allows completed video screencasts saved in a range of sizes & formats. Uploading of projects to YouTube, Vimeo and other hosting services such as Screencast.com or MediaCore. Provide iTunes podcast subscriptions, render in multiple video formats and embed completed videos on your website.

Examples of Screencasts:

  • Snagit is screen capture & image editing software . This screencast shows how to use the Send tab to share images with Skype contacts.
  • Another Sending Files tip. Try free XOOMFILE software.

Power Point to Video:
Convert presentations into video, don’t leave them on your desktop.

Audio – Sounding Good:

  • Good audio starts with a good microphone and a quiet room.
  • Record script dialogue with free Audacity software.
  • A recorded voice track serves as a guide to production length.
  • Voice recordings can be added into Power Point or Camtasia before rendering as a completed video.
  • Adding royalty free background music on a second audio track fills blanks & maintains listener interest.
  • When recording Voice Tracks, if you make an error, pause then repeat.
  • Record using a Dog Clicker to help you see audio errors for easy editing & deletion post recording.
  • For in-depth Audacity screencasts see Lisa Hartwell’s YouTube Channel.
  • Clicker sound leaves a convenient visual marker allowing accurate alignment of recorded or edited audio along the timeline for many projects. See image tip here: http://bit.ly/AudioVisualSyncTip
  • For multi-camera video shoots, to sync video clips on the timeline, camera recorded audio is used as a reference to sync clips to the primary recorded audio. Once all clips are synced to the primary recorded reference audio track, camera audio in the video clips is silenced or deleted. Singular Software’s PuralEyes is a sync tool of choice for complex project edits.

In-Depth Tutorial:
Ryan Eash Instructional Designer for Camtasia Studio has an excellent 30 minute tutorial on his screencasting process with dynamic Table Of Contents.

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Lecture Presentations: Recording & Playback
Two camera set ups, where one records the screen and the second a presenter, are easy to blend into single video recordings with Singular Software Presto. This is a low-cost seamless method for blending video recorded elements of lecture presentations. For examples click here For equipment & set up info on recording lectures click here. Click below to see a 2 minute notated example of blended video with Steve Jobs introducing the iBook app for the iPad.

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TechSmith’s Camtasia Relay  is an excellent lecture capture system for Teachers. Permanent installations with rich media integration of PTC (Pan Tilt Cameras),  document cameras, PC output feeds and microphones are more expensive due to hardware needed. Options to consider are Sonic Foundry  and Winnov

Web Meetings: Remote Groups OnLine
There are many options, most include post meeting playback of recorded events, click here for a current list of software & service providers

Video in WordPress has differences WordPress.com Vs WordPress.org

  • This screencast a shows Windows 7 search tip & plays on VideoPress.
  • VideoPress seems to compresses videos reducing image quality playback creating blurred images not present in the original. There seems no default control to force the HD setting to stay on, so original rendering quality is reduced and looks fuzzy in standard playback.
  • Compare with the original screencast below:

To integrate & auto size video on WordPress sites see Chris Coyier’s screencast

Hosting Screencasts & Video – There are many options.

  • YouTube free, but visually noisy & distracts viewers with links to other sites.
  • Vimeo has free & paid versions all of which work well.
  • Screencast.com allows a range of viewing flexibility with public, private, or viewer password log-in options in 25 gigabyte+ accounts.
  • MediaCore provides outstanding end-to end site control with noise free customisable web pages & detailed analytics.

This topic to be presented at WordCamp Victoria BC Jan 14th 2011.
Tickets are on sale now, to register click here.

Warning: Portions of the presentation are prerecorded ; )

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Khan Academy: Flipping the Classroom
Excellent examples how screencasting helps students learn.
A library of over 3,000 educational videos: http://www.khanacademy.org/

Khan Academy Explained on 60 Minutes

Khan Academy on TED



Skype 4.1 Update Tip

Skype released version 4.1 for Windows today however they forgot to update their servers & download links.

All Skype website download links for version 4.1 only download version 4.0.

Best to wait until Skype gets this sorted out.

Update: Skype download links for 4.1 are A-OK now.

Screensharing is the best new feature.

Skype 4.1 MIA

Polycom released new Beta software today for the Polycom C100S. If you use Vista, Skype and a Polycom C100S you will want to upgrade. Note: After installation you need to tell Windows Defender to allow this new software. This is not noted in the installation instructions. See screencast installation tip here: http://www.youtube.com/watch?v=kiwpfrnd4W0

Polycom C100S Beta 2.9.1

Call your Gmail & Facebook contacts direct via Skype. With the Skype toolbar for Firefox or Internet Explorer installed you can call telephone numbers or Skype contacts who have their web presence enabled from any web page. Skype shows your availability status to others on-line. This allows you to call your Gmail contacts and Facebook contacts direct with Skype.

Facebook & Gmail Skype Presence Examples

Call your Twitter Followers direct via Skype. With the Skype toolbar for Firefox or Internet Explorer installed you can call telephone numbers or Skype contacts who have their web presence enabled from any web page. Skype shows your availability status to others on-line. This allows you to call your Twitter Followers direct with Skype.

Skype Twitter Presense 10-06-2009 7-59-47 PM

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