Apple QuickTime VR User Manual Page 93
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93
A
APPENDIX
Compression
Compression reduces the size of your media files and improves the interactive response time
of your QTVR movies. Compression methods are referred to as codecs because a method
specifies a compression scheme as well as a decompression scheme.
Several compression methods are available in QuickTime VR Authoring Studio. This appendix
discusses those methods that are best to use with QTVR media files:
m Animation
m Cinepak
m Graphics
m Photo JPEG
m Video
Choosing a compression method
Each compression method has strengths and weaknesses. Some methods are more
appropriate for storing video than they are for storing still images. Some compression
methods introduce more distortion in the final product than others. Some compress slowly
and decompress quickly, while others compress and decompress at the same rate. Some
methods can compress a file to one one-hundredth of its original size, while others decrease
the file size very little.
When you choose a compression method, consider the following:
m the source material
m the quality of the compressed image
m the file size of the compressed image
m the time it takes to compress and decompress an image
- Setting Up Your Software 1
- Chapter 1 2
- Setting Up Your Software 3 3
- Introduction to 5
- QuickTime VR Authoring Studio 5
- Planning the project 8
- Creating source material 8
- Checking the final product 9
- 1 Install the software 9
- 10 Chapter 2 10
- Chapter 2 12
- Panoramas 13
- Motion Control 14
- Making a Panorama 15
- 4 Click Save 16
- 5 Click Add Image 17
- 9 Click Settings 18
- 14 Click the File tab 20
- 15 Click OK 21
- 16 Click Make Pano 21
- Chapter 3 22
- Stitching a Panorama 23
- From a Series of Images 23
- 6 Click Add Images 24
- 8 Click Image Alignment 25
- 11 Click OK 26
- 17 Click Settings 27
- Chapter 4 28
- 19 Click the Compression tab 29
- 24 Click the File tab 31
- 25 Click OK 32
- 26 Click Stitch Pano 32
- 3 Click Estimate 35
- 3 Click Correlate 37
- 4 Click OK 37
- Getting image information 38
- Making Objects 39
- 5 Click “Define object.” 40
- 7 Click Add Files 41
- Chapter 5 42
- 11 Click Settings 43
- Making Objects 45 45
- 16 Click Make Object 48
- Making Objects 49 49
- Move the guides by dragging 49
- Making Objects 51 51
- 2 Click Add Files 53
- Making Objects 55 55
- 4 Click Add Files 56
- Making Objects 57 57
- Making QTVR Scenes 59
- Chapter 6 60
- Making QTVR Scenes 61 61
- Specifying output files 62
- Creating scene components 62
- Making QTVR Scenes 63 63
- Creating links 65
- Making QTVR Scenes 67 67
- 4 Click the File tab 69
- Processing the scene 70
- Checking the links 71
- 4 Choose Edit Hot Spots 72
- Managing QTVR Projects 73
- Naming QTVR media and folders 74
- Managing QTVR Projects 75 75
- 3 Close the window 76
- Building the project 76
- 1 Click Build Project 76
- Managing QTVR Projects 77 77
- Creating Source Material 79
- Equipment guidelines 80
- Photographic techniques 81
- Chapter 8 82
- Digitizing images 83
- Computer-rendered images 83
- Creating Source Material 85 85
- Tips and Troubleshooting 87
- Chapter 9 88
- Tips and Troubleshooting 91 91
- Compression 93
- File size 94
- Source material 94
- Image quality 94
- Animation 95
- Graphics 95
- Photo JPEG 95
- Corybant West 97
- Kaidan, Inc 97
- Peace River Studios 97
- Director 97
- 100 Index 100
- Index 101 101
- 102 Index 102
- Index 103 103
- 104 Index 104
- QuickTime VR 105
- Authoring Studio 105
- K Apple Computer, Inc 106
- Contents 107
- 5 Making Objects 39 108
- 6 Making QTVR Scenes 59 108
- Contents v 109
- Appendix A 110
- Compression 93 110
- Appendix B 110
- Index 101 110
- Apple Computer, Inc 113
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