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  • Edit Size, src – what start see – invert2 and HREF for both netscape and IE passages Add 15 pixels to vert so controller will be seen – subtract 5 to completely hide Just use SRC if want to start as page loads IE needs whole URL in HREF but not netscape. Target variable keeps the video in the same page. IE SRC can be any thing that QT will open. Netscape seems to want it to be a movie.
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    1. 1. Video on the Web John H. Krantz Hanover College
    2. 2. Outline What is Video Acquiring with a Digital Camera Creating with ImageJ Editing with QuickTime Delivering in a Webpage
    3. 3. General Video Issues Image size Keep it small 320 x 240 is not uncommon Image color depth Normally full color Video Length The shorter the better This file is ~ 5.5 meg in QuickTime and it is 17 seconds If can’t get movie by clicking on the picture, click here.
    4. 4. General Video Issues Frame rate: recall difference between apparent motion and flicker 10 to 15 is really fine for most cases And best you can expect on web If can’t get movies by clicking on the pictures: click here for the left and here for the right.
    5. 5. Acquiring with a Digital Camera Find format of your video camera mine is QuickTime Can use digital zoom original camera images are much larger than movie images so will be shrunk down And digital zoom is before movie image
    6. 6. Acquiring with a Digital Camera Hold camera still or not? Movies are limited in duration mine is 30 sec or size of disk for 320x240 It is 120 sec if 160x120 Image quality is reasonably good if presented in original size But image quality may be reduced to get on web
    7. 7. Creating Animations with ImageJ Stacks Sequence of images to be played Found under Image menu Open the desired sequence in order Image: Stacks: Convert Images to Stack Can add and remove images (a Slice) under the same menu
    8. 8. Create Animations with ImageJ Stack Menu Can control frame rate under: Image: Stacks: Animation Options Get AVI writer plugin to save as a movie
    9. 9. Create Animations with ImageJ Useful for making a slideshow A frame rate of 1 frame per second is good And as slow as can have in ImageJ If you can’t get the movie by clicking on the picture, click here.
    10. 10. Slideshows Can also do slideshows in web pages In FrontPage it is built in Insert: Web Component Dynamic Effects: Banner Ad Manager Limited in number of images to 9 Here is an example
    11. 11. Slideshows Or the following Java Script Not limited in number These do not stop but can go slower than 1 frame per second
    12. 12. Editing with QuickTime Pro Open more than one Basics Opens MOV, mpg, avi, mp3, etc. Get Movie Information on Movie Menu (ctrl-j in Windows) Tracks: separate slices of information: played at same time as other tracks Look under the Edit menu
    13. 13. QuickTime Pro Interface Playback head In marker Out marker Selected region
    14. 14. Basic Editing Selecting a region to edit Use guides at bottom Called In and Out Markers Selected region is darkened Arrow keys to fine tune Cut and Paste operation Paste is at playback head
    15. 15. Adding Tracks Copy as before Use Edit: Add – adds the video track Use Edit: Extract Tracks Then Edit: Add Can extract sound this way to a movie Can add scaled so new track is not length of old movie
    16. 16. Deleting Tracks Use Edit: Delete Tracks Remove any unwanted sound from video
    17. 17. More Advanced Editing with QuickTime Pro Adding text to beginning Make any graphic Resize to movie size so know how it will look Select al (ctrl-A) Then cut and past to beginning Another past for each additional frame
    18. 18. More Advanced Editing with QuickTime Pro Overlaying Text Use a gif file with a transparent background Use a text file File: Import Any .txt Press Option button – Select keyed text – Change background to white and foreground to text color – I like changing it to bold Add tracks as before
    19. 19. More Advanced Editing with QuickTime Pro Filtering portions of movie Delete regions do not want to filter Use the export function Click on Options Click on Filter Pick pattern Use cut and paste to reassemble
    20. 20. Saving for Web Format: You must compress Uncompressed files will be very large Lead very slow download Duration For same reason, keep videos short
    21. 21. To Stream or Not to Stream Steaming Regular Delivery Starts sooner Wait for entire file Can be large files Keep to small files Can stop Keeps Speed Generally low Better quality quality General Protocol RTP/RTSP
    22. 22. Streaming vs. HTTP Fast Start HTTP Fast Start is a feature of QuickTime Allows playing after part of file downloaded Fewer stops No special software Still keep files relatively small Some loss of image quality
    23. 23. Embedding a QuickTime Movie in a Web Page <p align="center"> <OBJECT CLASSID="clsid:02BF25D5-8C17-4B23-BC80- D3488ABDDC6B" WIDTH="480" HEIGHT="376" CODEBASE=""> <PARAM NAME="src" VALUE=""> <PARAM NAME="controller" VALUE="false"> <PARAM NAME="target" VALUE="myself"> <PARAM NAME="href" VALUE=""> <EMBED WIDTH="480" HEIGHT="376" CONTROLLER="false" TARGET="myself" HREF="" SRC="" BGCOLOR="FFFFFF" BORDER="0" PLUGINSPAGE=" indext.html"></EMBED></OBJECT> </p> The code in a text his here.