The rolling shutter repair effect – Adobe Premiere Pro CC v.7.xx User Manual
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The rolling shutter repair effect
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Note:
A common problem for DSLR and other CMOS sensor-based cameras is that they typically have a lag time between scanning lines of video. Due
to the time lag between scans, not all parts of the image are recorded at exactly the same time, causing rolling shutter distortions. These distotions
can occur when the camera or subject is moving.
The Rolling Shutter Repair effect in Premiere Pro can be used to remove these distortion artifacts.
After applying the effect, the following properties are available:
Rolling Shutter Rate: Specifies the percentage of the frame rate which is the scan time. DSLRs seem are in the 50-70% range, and iPhone is
close to 100%. Adjust the Rolling Shutter Rate until distorted lines become vertical.
Scan Direction: Specifies the direction that the rolling shutter scan takes place. Most cameras scan the sensor top-to-bottom. With a smart phone,
you can operate a camera upside down or rotated, which would require a different scan direction.
Advanced section:
Method: Indicates if optical-flow analysis and pixel-motion retiming will be used to generate the unwarped frames (Pixel Motion), or if a
sparse point-tracking and warping method should be used (Warp).
Detailed Analysis: Performs a more detailed point-analysis in the warp. Available when using the Warp method.
Pixel Motion Detail: Specifies how detailed the optical-flow vector field computation should be. Available when using the Pixel Motion method.
Although the Warp Stabilizer effect has a rolling shutter repair effect within it, the standalone version has more controls. There are also
times when you want to repair a rolling shutter problem, but you do not need to stabilize the shot.
by Todd Kopriva and video2brain, you'll see how easy it is to repair rolling shutter artifacts, which are common in footage from DSLRs
and mobile phone cameras, using the new Rolling Shutter Repair effect.
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