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Video in learning process
 

Video in learning process

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    Video in learning process Video in learning process Presentation Transcript

    • Video in learning process Veronika Rogalevich [email_address]
    • What is video?
      • Video is the technology of electronically capturing, recording, processing, storing, transmitting, and reconstructing a sequence of still images representing scenes in motion.
      • Video - „I see“, visual motion, picture and sound
      • Video is actively used in education and has a great pedagogical value
      • Video helps to engage students, it can be used as social learning activity...
    • Types
      • Analog video (VHS, Betamax)
      • Digital video (DVD, Blu Ray Disk, QuickTime, AVI, WMV, MPEG4), recorded with digital video cameras
      • Digital video provides better quality and sharing opportunities(video is a file!)
    • Analog video standards
    • Display Resolution Standard One frame (width and length) Aspect ratio Picture size in video editing software DV-NTSC 720x480 4:3 720x534 DV-NTSC 720x480 16:9 960x534 DV-PAL 720x575 4:3 768x576 DV-PAL 720x576 16:9 1024x576 HDTV 1280x720   1280x576 HDTV 1920x1080   1920x1080
    • Aspect ratio
      • 4:3 : traditional television uses that, it can be used if You plan to put some slides or pictures beside the video picture (videolectures)
      • 16:9: HDTV uses that, try to prefer this, because but pixels used in  digital video  often have non-square aspect ratios and DV standard corresponds to wide-screen formats.
    • Video cameras and medias
      • Analog or digital, from 1990-nties DV is dominating)
      • Web-cameras (webcams), on laptops, iMacs etc.
      • Different cassetes
      • DV (Digital Video): small, medium ( DVCPRO, Panasonic) , large ( DVCAM) and extra-large ( DVCPRO XL ) .
      • All DV cassettes use tape that is ¼ inch (6.35 mm) wide.
      • Small or S-size is MiniDV cassette, most popular, are used for recording baseline DV, DVCAM as well as  HDV
    • DVCAM-L, DVCAM-M and MiniDV
    • File-based media
      • Tapeless recording
      • Optical discs (DVD, Mini DVD)
      • Flash memory cards (SD cards)
      • Hard-disk drives
      • Sony  XDCAM  family of cameras can record DV onto either  Professional Disc  or  SxS  cards.
      • Panasonic DVCPRO HD and AVC-Intra camcorders onto  P2  cards.
      • Panasonic  AVCHD  camcorders record DV video onto  Secure Digital  memory cards.
      • JVC GY-HM750 records onto Secure Digita l (SD) or SxS memory cards.
    • Raw video
      • Most DV and  HDV  camcorders can feed live DV stream over  IEEE 1394 interface   also called FireWire, to an external file-based recorder (i.e. computer) .
      • Video is stored either as native DIF bitstream or wrapped into an audio/video  container  such as  AVI ,  QuickTime  and  MXF .
      • DV-DIF  is the raw form of DV video. The files usually have extensions *.dv or *.dif.
    • Main raw formats
      • DV-AVI  is Microsoft's implementation of DV video file, which is wrapped into an AVI container. This container is used primarily on Windows-based computers, though Sony offers two tapeless recorders, the HDD-based HVR-DR60 [16]  and the CompactFlash-based HVR-MRC1K, [17] for use with DV/HDV camcorders that can record in DV-AVI Quicktime -DV  is DV video wrapped into Quicktime container. This container is used primarily on Apple computers (MOV-files).
      • MXF -DV  wraps DV video into MXF container, which is presently used on P2-based camcorders (Panasonic) and on XDCAM/XDCAM EX camcorders (Sony).
    • Additional accessories
      • Cables (USB, FireWire)
      • Microphones (wireless with transmitters, directional, condencer microphones)
      • Tripods
      • Chargers and batteries
      • Bags
      • http://www.tlu.ee/opmat/eope/videokoolitus/kaamerate_lisaseadmed.html#
    • Types of educational videos
      • Video lectures („ Talking head s“, tutorials ): main focus is the teacher who speaks directly to a live audience or the camera , with slides or without )
      • Using authentic archive video material : digitized materials from libraries (europeana.eu), archives
      • Animated screenshots : animated screenshots of using software together with a soundtrack in the form of ‘mini-movies’
      • Instructional 'how to videos' of a practical activity :  to show the process, procedures and different stages of doing something concrete
      • Interviewing an expert or expert presentation : guest speakers, who present an alternative viewpoint , used for further discussion s with students.
      • Video blogs 'think aloud‘: personal reflection of learner or teacher on some subject,  record their thoughts and actions , tone, humour and spontaneity.
      • Video case studies/simulations/role plays:  the intention is to simulate an event such as a lab experiment where safety might potentially be at risk or to engage in a role-playing situation in the form of a case study where the students can experiment with different responses and behaviors . Video in this case provides ‘real life’ context, and/or emotional impact
      • Videoing real events and situations: The purpose is to capture an action that cannot be physically brought into the classroom ( any outdoor event or situation, trips etc.)
      • Presentation/performance skills and feedback: The aim is to capture, review and enhance performance of individuals and groups through reflection and discussion . Recorded perfomances.
      • Students create their own video : the most interactive and pedagogically effective variant. Students create their own portfolios, participate in projects on concrete topics and record videos (upload them on the web).
    • Main processes
      • Idea, purpose and scenario
      • Technical preparation
      • Flming
      • Importing video to computer
      • Editing
      • Publishing and distributing (usually online)
      • Embeding videos into learning environments, blogs, web-pages etc.
    • Technical preparation
      • Charged batteries
      • Camera(s) in bags
      • Tapes or flash memory cards
      • Tripod
      • Microphones (charged) and properly adjusted
      • Light (if needed)
    • Filming
      • Use the tripod!
      • Follow the scenario ( if you have one)
      • Make a number of scenes (do not film all the movie without stop)
      • Shoot one scene at least 2-3 times (so You can choose the best one)
      • Try different compositions and corners, general, portrait and detailed perspectives.
      • Film also some cover plans (some neutral objects around) to insert them in some long or boring places.
      • Zooming should be slow and smooth
    • Imorting your clips to computer
      • Connect camera to your computer using FireWire or USB cables
      • or take out memory card and insert to the card-reader
      • Open video editing program
      • Choose Import video (Capture video, Add video)
      • Or just copy and paste clips from camera (phone) to hard disk of the computer.
    • Editing software
      • Free and easy to use: Windows Live Movie Maker , iMovie , Pinnacle VideoSpin , Cinerella
      • Commercial and professional:
      • Avid – most popular, for PC and Mac
      • Adobe Premiere – compatiable with other Adobe products, for Mac and PC.
      • Pinnacle Studio – easy to use, enough possibilities
      • Apple Final Cut – professional software for Mac-platform
      • Cyberlink PowerDirector – new, easy to use, PC-platform
      • Corel VideoStudio – animation, 3D possibilities, PC.
    • Remember, commercial software manufacuters offer free trials for 30 days!
    • Publish your video
      • Choose the putput file in your video editing program : wmv in Movie Maker, avi, mov, mpeg2, mpeg4, flv
      • Digital video requires a lot of space: 1 frame is 1 MB, 1 hour is 12,9 GB (uncompressed).
      • DVD capacity is usually 4 GB
      • Blu-Ray disks: from 25 GB to 200 GB (good for HD video)
      • Make a good quality file for DVD (AVI, MP4, MOV) and compressed smaller files for web (wmv, flv, mp2)
    • Compression standards
      • H.264/MPEG-4 Part 10  or  AVC : standard for recording, compression, and distribution of high definition video (HDV)
      • MPEG-2 : lossy compression, used in DV broadcasting (satellite TV), DVD, Blu-Ray.
      • MPEG-4 : compression of AV data for web (streaming media) and CD distribution, voice (telephone, videophone) and broadcast television applications , Mobile phones (3GP ).
    • Share!
      • YouTube : www.youtube.com (2 GB, 15 minutes)
      • Vimeo : www.vimeo.com (500 MB per week, no time limits)
      • Veoh : http://www.veoh.com (no time limits, 1 GB without Veoh Web Player and no limits if You have one!)
      • DailyMotion : http://www.dailymotion.com/ (150 MB, 20 minutes)
      • TeacherTube: http://teachertube.com/ (100 MB)
    • Embed!
      • Every video channel has embedding oppotunities (codes).
      • Copy the code and paste it to Your blog, website, learning environment in HTML-editor.
      • Let’s try: http://www.youtube.com/watch?v=nJ0nlh5FU5A
      • Find and click the Share-button below videoclip and then Embed-button – you can see the code below, just copy it and paste to Your blog in HTML-view.
    • If You have some questions or comments, get in touch!
      • Veronika Rogalevich
      • Educational technologist
      • Tallinn University Center of E-learning
      • [email_address]