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Streaming Video for Distance Learning

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Transcript

  • 1. Streaming Video for Distance Learning© Presented by: Timothy R. Haley Sandhills Community College
  • 2. Music Appreciation: Composers
  • 3. PowerPoint® in the Classroom
  • 4. PowerPoint® Online (Save As: HTML)
  • 5. PowerPoint® Plus Animation
  • 6. PowerPoint® Plus Narration
  • 7. Visual Communicator® Demo (3:55)
  • 8. PowerPoint® to Online Video
  • 9. Composers’ Showcase© (3:45)
  • 10. Video Validation Codes Students need to send the Validation Code in an email to verify that they watched the video. Credit is awarded for each Validation Code.
  • 11. Getting Started: Hardware ire® FireW Video Camera Mic In Computer Microphone
  • 12. Using Visual Communicator®
  • 13. Create Script in Teleprompter Area
  • 14. Drag Graphics into Effects Area
  • 15. Align Graphics to Script Area
  • 16. Adjust Show Settings
  • 17. Rehearse & Record Video
  • 18. Save Recorded Video to Hard Drive
  • 19. Video Encoding for Compression If the video file is too large, the image and audio quality will be poor or unplayable. The average uncompressed digital video file size is around 4MB per second. (AVI) 56K dial-up modems can only receive around 4KB per second. Compression is needed to effectively deliver streaming video for distance learning.
  • 20. Decreasing Video File Size Reduce Video Window Size Reducing the video window size reduces the amount of data sent and the overall file size. Slow connections need a smaller video window size than faster connections for viewing. Apply Video Codecs Codecs remove unnecessary visual and audio data to reduce the amount of data sent. All media players can NOT play all codecs.
  • 21. Codec Option 1 Save As: RealVideo® (RM)
  • 22. RM Plays in RealPlayer®
  • 23. Codec Option 2 Save As: Windows® Video (WMV)
  • 24. WMV Uses Windows® Media Player
  • 25. Video File Size & Quality Options
  • 26. Small File Size: Dial-up Modems SMALL Dial-up Modems
  • 27. Medium File Size: DSL/Cable Modems MEDIUM DSL/Cable Modems
  • 28. Additional File Size Options LARGE Campus Network LARGEST Local Playback CUSTOM Advanced Users
  • 29. ONLINE: Use Small & Medium Sizes
  • 30. Using Visual Communicator® Create Two Video Files (RM or WMV) VIDEO_FAST.* MEDIUM FILE SIZE 320 x 240 320 x 240 Window Size DSL/Cable CD Quality Audio DSL/Cable Bandwidth ~1.25 Mb Per Minute ~1.25 Mb VIDEO_SLOW.* SMALL FILE SIZE 176 x 132 Window Size 176 x 132 AM Radio Quality Audio Dial-up Dial-up Bandwidth ~275 Kb ~275 Kb Per Minute
  • 31. Transfer Video Files to Web Server Web Server HTTP PROTOCOL VIDEO_FAST.* VIDEO_FAST.* (Medium File Size) VIDEO_SLOW.* VIDEO_SLOW.* (Small File Size)
  • 32. Create Two Course Links Blackboard® HTTP PROTOCOL VIDEO FAST LINK HTTP://webserver/VIDEO_FAST.* VIDEO SLOW LINK HTTP://webserver/VIDEO_SLOW.*
  • 33. Video Fast Course Link Path Blackboard® Web Server HTTP PROTOCOL HTTP PROTOCOL VIDEO FAST LINK VIDEO_FAST.* VIDEO SLOW LINK
  • 34. Video Slow Course Link Path Blackboard® Web Server HTTP PROTOCOL HTTP PROTOCOL VIDEO FAST LINK VIDEO SLOW LINK VIDEO_SLOW.*
  • 35. Music Appreciation Example MEDIUM FILE SIZE For DSL/Cable SMALL FILE SIZE For Dial-up
  • 36. Beyond HTTP: Streaming Video HTTP (HyperText Transfer Protocol) Designed to Deliver Web Documents (Not Streaming Video) Uses Data Error Correction (Slow) Increased Server Load & Bandwidth Requires Large Video Buffer Download (Delayed Playback) Video Files are Downloaded to Student’s Computer (Copyright Issues)
  • 37. Streaming Video Protocols MMS (Microsoft® Media Streaming) Protocol Proprietary Protocol for Windows® Media Needed for Early Windows® Media Players RTSP (Real-Time Streaming Protocol) Created for Streaming Video & Audio Files NO Data Error Correction (Faster) Requires Less Bandwidth than HTTP Small Buffer Size (Immediate Playback) Files Do Not Download to Student’s Hard Drive
  • 38. Streaming Video Server Install Server Operating System (Windows®, Linux®, Sun Solaris®, IBM®, etc.) Install Helix® Streaming Software Helix® Server-Basic (Free Download) Max 5 Uses Only RealMedia® 10 File Formats Streams Max 5 Simultaneous Streams (~25 Students) Helix® Server-Starter $2,240 ($1600 + $640 yr.) Max 25 Uses Only RealMedia® 10 File Formats Streams Max 25 Simultaneous Streams (~125 Students) Helix® Universal Server $5,600 ($4000 + $1600 yr.) 55 File Formats (Real®, Windows®, QuickTime®, Flash®, etc.) Max 100 Supports Both MMS and RTSP Streaming Protocols Streams Max 100 Simultaneous Streams (~500 Students)
  • 39. Transfer Video Files to Video Server Video Server MMS/RTSP PROTOCOL VIDEO_FAST.* VIDEO_FAST.* (Medium File Size) VIDEO_SLOW.* VIDEO_SLOW.* (Small File Size) Helix® Universal Software
  • 40. Create Two Course Links RealVideo® Format (RAMGEN) Blackboard® HTTP PROTOCOL VIDEO FAST LINK: RAMGEN Converts HTTP HTTP://videoserver/RAMGEN/VIDEO_FAST.RM to VIDEO SLOW LINK: RTSP Streaming Protocol HTTP://videoserver/RAMGEN/VIDEO_SLOW.RM
  • 41. Create Two Course Links Windows® Video Format (ASXGEN) Blackboard® HTTP PROTOCOL VIDEO FAST LINK: ASXGEN Converts HTTP HTTP://videoserver/ASXGEN/VIDEO_FAST.WMV to VIDEO SLOW LINK: MMS Streaming Protocol HTTP://videoserver/ASXGEN/VIDEO_SLOW.WMV
  • 42. Video Fast Course Link Path Blackboard® Video Server HTTP PROTOCOL MMS/RTSP PROTOCOL VIDEO FAST LINK VIDEO_FAST.* VIDEO SLOW LINK
  • 43. Video Slow Course Link Path Blackboard® Video Server HTTP PROTOCOL MMS/RTSP PROTOCOL VIDEO FAST LINK VIDEO SLOW LINK VIDEO_SLOW.*
  • 44. Visual Communicator® Save As: AVI for Advanced Encoding (Audio Video Interleave)
  • 45. OPTION 1 RealProducer® Plus 10 ($199) Input as Visual Communicator® Output as AVI Video RealMedia® 10 Resize Window Select SureStream® Bit Rates
  • 46. RealProducer® Plus 10 SureStream® Encoding SureStream encodes a RealVideo file at multiple bit ® ® rates for various bandwidths. (Audiences) Slow connections receive the stream at the lowest bit rate and quality, while users with faster connections get a stream with better quality.
  • 47. RealProducer® Plus 10 SureStream® Encoding Helix® Server software automatically down shifts to a lower quality stream when a connection slows down due to network traffic. When the network clears, Helix® Server up shifts to the higher stream quality.
  • 48. OPTION 2 Windows® Media Encoder 9 (FREE)
  • 49. Windows® Media Encoder 9 Select Convert File Import AVI Video File
  • 50. Windows® Media Encoder 9 Select Streaming Format Select Multiple Bit Rates Different Window Sizes are Encoded into One Video File
  • 51. Windows® Media Encoder 9 Enter Video Information Save As: VIDEO.WMV
  • 52. Benjamin Britten: “A Young Person’s Guide to the Orchestra”
  • 53. Jeremy Yudkin:“Inside the Orchestra”
  • 54. Online Course Announcements
  • 55. Online Course Announcement (1:00)
  • 56. Online Course Orientation
  • 57. Online Course Orientation (2:00)
  • 58. Scene from “Le nozze di Figaro”
  • 59. Visual Communicator® Visual Communicator® WEB $189.95 (Retail) Includes V-Screen, a foldable green backdrop that can be used with the software's green- screen effects feature to superimpose a person in front of virtual backgrounds. A professional-quality clip-on microphone to increase audio clarity and eliminate unwanted ambient noise when narrating video presentations or slide shows.
  • 60. Additional Hardware & Software Scanner Digital Camera Image Editing Software Photoshop® Audio Editing Software Audacity® Video Editing Software Pinnacle Studio 9®
  • 61. Top 10 Lessons Learned 10. Use Consistent File Format (Real® OR Windows®) 9. Students Still Use Dial-up Modems 8. Your College Network’s Bandwidth is Limited 7. Keep Videos Under 10 Minutes 6. Sacrifice Video Quality for Bandwidth 5. Fancy Video Effects Consume Bandwidth 4. Use Readers Digest Version of Course Material 3. Incorporate Validation Codes 2. Use a Streaming Media Server 1. Start Slow - One Project at a Time
  • 62. Streaming Video for Distance Learning© Presented by: Timothy R. Haley Sandhills Community College