QuickTimeVR
Embedding a QuickTime Movie into a webpage
The old method of using <embed> or <object> tags to place a QuickTime movie into a web page is no longer recommended,
because of an update Microsoft made to Internet Explorer for Windows in 2006. Here is an example of the old method:
<embed src="file_name.mov" width=400 height=316 controller=TRUE>
</embed>
The method now recommended by Apple is explained on this web page:
http://developer.apple.com/internet/ieembedprep.html
We used the method described under the heading: External JavaScript Solution Two: For Multiple Occurrences of QuickTime Content.
To use this method you will need to click 'Download the JavaScript files'.
Place the file AC_QuickTime.js in the same folder as your web page.
Place this code withing the <head> </head> tags:
<script src="AC_QuickTime.js" language="JavaScript" type="text/javascript"></script>
Here is an example of the code that should be placed where you want the QuickTime movie to appear, within the <body> </body> tags:
<script language="JavaScript" type="text/javascript">
QT_WriteOBJECT('file_name.mov', '400', '316', '',
'autoplay', 'true',
'controller', 'true');
</script>
This is for a QuickTime movie that is 400 pixels wide by 300 pixels high.
The QuickTime movie control bar is 16 pixels high, so 16 pixels are added to the height dimension in the HTML code.
File Size of QuickTimeVR Object Movies
Factors which influence the file size of a QuickTimeVR object movie:
Resolution of the original still photographs used to created the movie
Low resolution = Lower quality and small file size
High resolution = High quality and large file size
We created our QuickTimeVR movies at a standard aspect ratio of 4:3
i.e. Width = 400 pixels, Height = 300 pixels
If the still photographs imported into the VRWorx software were 400x300 pixels with a resolution of 72 pixels/inch and the movie was exported at the same size, the resultant movie would look sharp when it was zoomed-out. As soon as the viewer zoomed-in, pixelation would start to be visible.
If the still photographs were 800x600 pixels with a resolution of 72 pixels/inch and the movie was exported at the same size, the resultant movie would look sharp when it was zoomed-in to approximately double-size.
800x600 pixels, 72 pixels/inch is the same quality as 400x300 pixels, 144 pixels/inch
JPEG compression
Substantial compression = Lower quality and small file size
Medium compression = Good quality and larger file size
(See Note below Table 1)
Number of still photographs used to create the movie
The standard number of still photographs used to create a single-row QuickTimeVR object movie is 36, giving a 10 degree interval between each photograph.
If you increase the interval between each photograph to 20 degrees, then the number of photographs used is 18. This will approximately halve the file size of the movie.
The movie will be less smooth as a result.
