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  • How can you use video as part of your instruction? Distance learning: WebCT or MAILE: WebCT is capable of video, yet it is not highly recommended due to the large size of files to download.
  • How can video be an assignment for students? Another form of expression: An alternative to written assignment -Dr. Hunter McEwan’s MET cohort used video clips in PowerPoint presentations on school portraits Engages students’ attention in content: video projects can make a normally boring project very interesting. Like Apple – (interesting science/physics topics). Useful technical skill – can take this skill into the classroom.
  • This example blurs the line between using video as part of the curriculum and having it as an assignment for the students. 5 th grade students in a science class. About 30 students in the class, split up into groups of 5 (so 6 groups total). Each group has to explain to their classmates about a scientific principle. Research principle, draft out storyboard, shoot footage, edit footage, record onto video tape. Imagine that this process was done this year. The following years, the teacher will have a library of many clips that he or she could use in the class.
  • If used in instruction, how do students turn in their assignments? Keep in mind your audience. Video tapes are easy to handle for both professors and students. Video clips on CD-ROM are also convenient for both professors and students, yet the quality of the video will decrease dramatically. Video clips in multimedia Video for the web is greatly dependent on the connection speed of the students. You could separate the files into multiple files that will decrease the downloading time. Yet, it students have a slow connection, they may get frustrated with the video and skip it altogether. -Streaming video (Real player, see buffering) -Progressive downloaded video (a copy of the video resides on your computer)
  • Media converter
  • Say want to stream footage of a child riding a tricycle. Make sure you have good video and audio, make sure lighting is good, etc.
  • Import it into computer, edit using non-linear editing software like iMovie, Final Cut Pro, Premiere, Windows Movie Maker, Studio DV, etc. Edit the movie to be what you want it to be (give tips later on) More video footage used, more audio used, more transitions, more titles used, the larger your file will be.
  • When movie is completed, computer uses a codec to create your computer file. Define codec: Compression-Decompression (JUST LIKE ZIPPED FILES) Part 1: compresses video and audio files into smaller packages so can be sent over the Internet Part 2: After sent over the Internet, your computer has to decompress file so you can view it Upload to server Anyone access your file, information travels over a specific bandwidth.
  • Mathematical algorithm for noting change between frames: Like a flip book: The less change there is between one picture to the next means less information traveling through the bandwidth, hence smaller files and faster download times. 1 frame of video is approximately 1 MB in storage space; 30 frames in 1 second of footage = ~30 MB of storage space
  • Mathematical algorithm for noting change between frames: Like a flip book: The less change there is between one picture to the next means less information traveling through the bandwidth, hence smaller files and faster download times.
  • Mathematical algorithm for noting change between frames: Like a flip book: The less change there is between one picture to the next means less information traveling through the bandwidth, hence smaller files and faster download times.
  • Qualcomm PureVoice good for speech QDesign Music good for music audio
  • Photo JPEG: good for still images Motion JPEG: high quality motion video at high data rates Sorenson: highest quality motion video at web data rates H.263: good codec for unreliable data connections
  • Portrait mode on video camera: shorten depth of field; focus on subject at expense of background
  • Transcript

    • 1. Let’s Stream! Using iMovie 2 An overview of video for streaming for the Internet
    • 2. Workshop Agenda  Video in instruction  Tools and tips for streaming video  Overview of iMovie 2  Hands-on with iMovie 2  Importing  Editingand enhancing  Exporting (video and computer files)
    • 3. Two thoughts on video…  As part of the curriculum  As an assignment within a curriculum
    • 4. As a part of the curriculum  When you are not in class  Interesting topics  Distance learning
    • 5. About using video on the web… Be aware of your audience!  Bandwidth/connection speed?  Processor speed?  RAM?  OS/browser/plug-ins?
    • 6. As an assignment within the curriculum  Another form of expression  Engages students’ attention in content  Useful technical skill
    • 7. An example…
    • 8. Finished video formats  Video tapes  Video files  CD or DVD  In multimedia production  PowerPoint  Hyperstudio  On a webpage
    • 9. Equipment needed  Video camera  Digital 8  Mini DV
    • 10. Equipment needed  Tripod  Video tapes
    • 11. Equipment needed  FireWire cable  iMac with iMovie
    • 12. How do you stream? Take the best possible video and audio!  Use a tripod  Less pans and zooms the better  Use an external microphone  Lighting is good
    • 13. How do you stream?
    • 14. How do you stream? codec Info Bandwidth
    • 15. How do you stream? Bandwidth
    • 16. Codec  Compression-Decompression  Makes video/audio files smaller so easier to transmit over the Internet  Macs and PCs do not have the same default codecs
    • 17. Example – video footage H.263 compression, 12 fps, Keyframe rate = 99 No audio compression 240 x 180 pixels QT file = 108 KB, AVI file = 697 KB 5:17 seconds = 167 frames (or 167 individual pictures)
    • 18. Possible compression Multiple pictures that represent changes
    • 19. Codecs apply to… Bandwidth Images Images Images Sound Sound Sound images sound
    • 20. Streaming codecs As recommended by QuickTime for the Web
    • 21. Audio Codecs  Qualcomm PureVoice  QDesign Music
    • 22. Video Codecs  Photo JPEG  Motion JPEG  Sorenson Video  H.263
    • 23. iMovie’s preset codec options  Email Movie, small  Web Movie, small  Streaming Web Movie, small  CD-ROM Movie, medium  Full Quality, large  Expert – you set both video and audio
    • 24. Is this a good video clip?
    • 25. What was wrong?  Background movements  Bad zooms  Horrible picture and sound quality  Distracting transitions  Small titles
    • 26. How to improve it?  Subtle background  Portrait mode on video camera  Use a tripod  Stills are great!  Zoom in from beginning or pan very slowly  Slow down pan in iMovie
    • 27. How to improve it?  Get quality video and audio from the start  Better to degrade than try to improve  Good lighting  Use transitions sparingly  Remember change is bad!  Large titles
    • 28. Improvement
    • 29. Let’s get started! Using iMovie 2
    • 30. iMovie’s Components 1 Viewer 2 Bookshelf 3 Timeline
    • 31. iMovie’s Components  Eyeball view  Clock view
    • 32. Answers Pans and Zooms Large Titles iMovie 2