The parameters for this plug-in are described below.
Analyse - This is a push button which will trigger an analysis of the input clips and calculate a corner pin. Interrupting the analysis will not delete the corner pin keys that have already been calculated.
Render During Analysis - If set, this toggle will cause the effect to update the time line and render a freshly analyzed frame in the Viewer so you can see the progress of the effect. Doing so will slow down the analysis somewhat, so toggle this off to speed up the general analysis.
Clear Analysis - Pressing this push button will delete all keyframes from the corner pin parameters, allowing you to force a re-analysis if you feel the need to.
Analysis Range - This controls the range of frames any analysis will be run over. It can be one of:
• Specified Range - which will look at the parameters Analysis Start and Analysis Stop for the range of frames to analyze,
• Source Clip Range - which will automatically determine the range of frames to analyze from the length of the input clip.
• Current Frame - the analysis occurs only on the current frame. This is useful for correcting any errors that may have occurred while analyzing the entire clip.
Analysis Start - The first frame to analyze from if Analysis Range is set to Specified Range.
Analysis Stop - The last frame to analyze from if Analysis Range is set to Specified Range.
Scale - A toggle that indicates whether the calculated corner pin can include a scaling factor.
Rotate - A toggle that indicates whether the calculated corner pin can include rotations.
Translate - A toggle that indicates whether the calculated corner pin can include translations in x and y.
Perspective - A toggle that indicates whether the calculated corner pin can include perspective transforms.
Analysis Region - This is the region analyzed to calculate the four-corner pin. This is especially useful when doing any form of frame locking, in which case, go to the lock frame, look at the reference clip and position the box over the area you want locked.
Analysis Region BL - controls the position of the bottom left corner of the analysis region.
Analysis Region TR - controls the position of the top right corner of the analysis region.
Advanced - The lesser used refinement controls.
Accuracy - This controls the time/accuracy trade off. The higher this is, the slower the analysis, but you have a better likelihood of a good result.
Filtering - Sets the filtering quality.
• Low - low quality but quick to render.
• Medium - uses a bilinear filter. This gives good results and is quicker to render than high filtering.
• High - uses a sinc filter to interpolate pixels giving a sharper repair. This gives the best results but takes longer to process.
Invert - if set, then the inverse of the calculated four-corner pin is used during render.
Four Corner Pin - The corner pins calculated during the analysis pass:
Bottom Left - the lower left corner pin.
Bottom Right - the lower right corner pin.
Top Left - the upper left corner pin.
Top Right - the upper right corner pin.