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Appendix A, Understanding Pulldown
Overview
Depending on your editing video format, a pulldown may be required to convert
23.98 fps video to 29.97 fps video for output on Matrox MXO2. When a
pulldown is required for your video output, Matrox MXO2 performs either a
standard 2:3 pulldown or an advanced 2:3:3:2 pulldown.
Standard 2:3 pulldown
Standard 2:3 pulldown is often used as part of the telecine process to transfer
24 fps film footage to 29.97 fps interlaced video. This pulldown method is also
used to convert any 23.98 fps progressive video to 29.97 fps interlaced video,
such as for converting 486p @ 23.98 fps video to NTSC.
In order to convert 24 fps film or 23.98 progressive video to 29.97 fps interlaced
video, additional video frames, and more specifically video fields, must be
created and added to the video sequence. For example, to convert a sequence of
four film or progressive frames, five frames of video are needed for a total of 10
video fields. Therefore, one additional video frame or two video fields must be
created. To accomplish this, the first and third frames of a four-frame film or
progressive video sequence are each converted to two video fields. The second
and fourth frames of the sequence are converted to three video fields to make up
a total of five interlaced video frames.
The following diagram demonstrates the process:
Standard 2:3 pulldown is accomplished by representing the first frame of film or
progressive video (frame A) as two fields of video (fields a1 and a2), the second
frame (frame B) as three fields of video (fields b1, b2, and b3), the third frame
(frame C) as two fields (fields c1 and c2), and the fourth frame (frame D) as three
fields (fields d1, d2, and d3). This sequence repeats six times each second.
A B C D
a1 a2 b1 b2 b3 d2d1c2c1 d3
Film frames @ 24 fps or progressive frames @ 23.98 fps
Video fields @ 29.97 fps
Frame A Frame C Frame DFrame B Frame E
- Matrox MXO2 1
- Trademarks 2
- B. Software limited warranty 3
- C. End-user registration 4
- D. Hardware limited warranty 4
- E. Limitations of warranty 4
- F. Limitations of liability 5
- G. Indemnification disclaimer 5
- H. Unauthorized use 5
- I. Choice of law 6
- 1. License 7
- 2. Restrictions 7
- 3. Copyright and ownership 7
- 4. Exclusion of warranty 8
- 5. Limitation of Liability 8
- 6. Confidentiality 9
- 7. Termination 9
- 8. General 9
- 9. Unauthorized use 10
- 10. Choice of law 10
- Contents 11
- Using Matrox A/V Tools 16
- Understanding Pulldown 18
- Matrox MXO2 Connectors 18
- Matrox MXO2 Specifications 19
- Matrox Customer Support 20
- Introducing Matrox MXO2 21
- Welcome to Matrox MXO2 22
- About this manual 23
- Last-minute information 24
- Installing Your Matrox MXO2 25
- Hardware and Software 25
- Avoid costly damage 26
- Installing Matrox Mtx.utils 29
- Start > All 30
- Available MXO2 connections 34
- Powering MXO2 34
- ²Caution When 35
- To Matrox PCIe host adapter 36
- To Matrox MXO2 36
- MXO2 RS-422 serial connection 38
- Digital video connections 40
- Matrox MXO2 Rack 41
- Rack mounting your MXO2 Rack 42
- Powering MXO2 Rack 44
- RS-422 serial cable 47
- RS-422 device 47
- MXO2 Rack 47
- (partial view) 47
- Matrox MXO2 LE 51
- Available MXO2 LE connections 52
- Powering MXO2 LE 52
- (side view) 56
- Matrox MXO2 Mini 59
- Powering MXO2 Mini 60
- HDMI video connections 66
- Calibrating Your HDMI Monitor 67
- Calibrating your HDMI monitor 68
- RGB - calibrated using the 71
- Using Matrox MXO2 with Adobe 73
- Events panel 74
- Capture 96
- HDMI Input as your genlock 98
- Analog Input 98
- Project panel 99
- Project panel. Because 99
- Connection and setup 107
- Recording your voice-over 108
- , and those 112
- and you won’t be able to 112
- in the 118
- Premiere Pro 119
- Available effects 120
- Adobe Premiere Pro 121
- Using Select Mask 123
- Using Split View 126
- in the Effect 127
- Controls 127
- 0 Default end point 128
- 1 Default end point 128
- Adjusting tonal range 130
- Using the color balance graph 131
- Reset Color 132
- Balance button 132
- Shadows 133
- Performing an auto balance 134
- °To perform a color match: 135
- Master 136
- Shadows color map 136
- 0 Input 137
- 1 Input 137
- 2 Output 137
- 3 Output 137
- Using the selective key graph 144
- 0 Hue 1 Aperture 2 Softness 145
- 3 High Clip 146
- Auto Key affects values 147
- Creating a color pass effect 148
- Expand Outside Mask 149
- 3 Aperture 4 Luminance 153
- 3 Aperture 154
- 4 Luminance 154
- Foreground image 156
- Underlying image 156
- Result of luma key 156
- Creating a luma key effect 157
- Using the luma key graph 158
- HIGH GAIN 159
- LOW GAIN 159
- LOW CLIP 159
- HIGH CLIP 159
- Creating a wipe transition 160
- Applications 163
- OK to save your settings 168
- 1 Do one of the following: 176
- Your notes 184
- About Matrox A/V Tools 186
- Starting Matrox A/V Tools 186
- Positioner 189
- 1 Click the Options button 190
- Selecting your capture folder 192
- Video Output tab 194
- 3 Click the Video Output tab 198
- 3 Click the Genlock tab 201
- Clipping 210
- Peak level 210
- Capturing clips 211
- Editing clips 212
- Working with the clip list 213
- Copying clips 214
- Moving clips 214
- Deleting clips 214
- Grabbing a single-frame image 215
- Keyboard shortcuts 217
- Overview 220
- Adobe After Effects 221
- Adobe Photoshop 221
- Autodesk 3ds Max 221
- Autodesk Combustion 222
- NewTek LightWave 3D 222
- Live Media Encoders 223
- Procaster 227
- Using Matrox MXO2 with 231
- Telestream Wirecast 231
- Sources > Show Sources 236
- Settings 236
- Record functionality 243
- Source Settings dialog box 244
- Approximate 244
- Maximum Duration 244
- Record status 245
- Record log file 246
- This chapter explains how to 249
- Windows codecs to render 249
- Before you start rendering 251
- Adobe Media Encoder 258
- Premiere Pro sequence 263
- Adobe Encore 265
- Project 268
- How to capture clips 275
- Advanced button 280
- Starting your capture 284
- Displaying system information 288
- Hardware 290
- Error notification 291
- Video fields @ 29.97 fps 294
- MXO2 inputs 298
- MXO2 Rack inputs 299
- MXO2 LE inputs 300
- MXO2 Mini inputs 301
- Input connector descriptions 302
- MXO2 outputs 305
- MXO2 Rack outputs 306
- MXO2 LE outputs 307
- MXO2 Mini outputs 308
- Output connector descriptions 309
- Capture Formats 313
- Supported input formats 314
- A/V Tools 317
- H.264 Capture 318
- Matrox MXO2 Supported Output 319
- Matrox MXO2 output 320
- Sequence video 320
- Main output 320
- Secondary output 320
- Avid editing applications 332
- Matrox A/V Tools 333
- Wirecast 334
- Matrox MXO2 specifications 336
- $ HDTV output 337
- $ SDTV input 337
- $ SDTV output 337
- ), terminated 339
- Environmental specifications 340
- Connections 341
- Matrox MXO2 LE specifications 345
- $ HDTV analog component video 351
- $ SDTV analog component video 351
- (for laptops) 353
- Registration 356
- Contacting us 356
- Numerics 357
- Compliance Statements 369
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