Kdenlive/Manual/Clip Menu/Stabilize: Difference between revisions

Revision as of 08:07, 6 January 2013

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Stabilize

This menu item is available from right click on a clip in the project tree or under the project menu when a clip is selected in the project tree.

This feature applies image stabilization algorithms to the clip which can reduce the shakiness of a shaky bit of footage.

stabilize ( vstab)

This tutorial shows how to use the stabilize feature - vstab version:

The "shutter angle" setting that the narrator says he does not know what it does (1:35) ... Shutter angle is an angle that images could be maximum rotated for stabilization. see here.

stabilize (transcode)

Based on the tool tips from this screen this what all the options mean:

optzoom = use optimal zoom (calculated from transforms) - default - checked

accuracy = accuracy of shakiness detection - default 4

algo (= algorithm used) unchecked =brute force. checked= small measurement fields - default = checked

maxangle = maximum angle to rotate - in radians. default = -1

realtive (typo ? in kdenlive) unchecked = absolute transform, checked = relative transform

zoom - additional zoom during transform default = 0

shakiness - how shaky is the video. Default = 4

invert - invert the transform. default = unchecked

sharpen - sharpen transformed image. Default = 0.8

stepsize - step size of Detection process minimum around - default = 6

show 0= draw nothing, 1 or 2 = show fields and transforms. default = 0

mincontrast below this contrast - the field is discarded. default =0.3

smoothing = number of frames for lowpass filtering default =10

maxshift maximum number of pixels to shift default = -1

crop unchecked = keep border, checked = black background. default = unchecked

This video shows a side by side comparison between vstab and transcode stabilize methods.

@@ Line 24: / Line 24: @@
 Based on the tool tips from this screen this what all the options mean:
-optzoom = use optimal zoom  (calculated from transforms) - default - checked
-accuracy = accuracy of shakyness detection - default 4
+'''optzoom''' = use optimal zoom  (calculated from transforms) - default - checked
-algo (= algorithm used)  unchecked =brute force. checked= small measurement fields - default = checked
+'''accuracy''' = accuracy of shakiness detection - default 4
-maxangle = maxium angle to rotate - in radians. default = -1
+'''algo''' (= algorithm used)  unchecked =brute force. checked= small measurement fields - default = checked
-realtive (typo ? in kdenlive)  unchecked = absolute transform, checked = relative transform
+'''maxangle''' = maximum angle to rotate - in radians. default = -1
-zoom - additional zoom during transform default = 0
+'''realtive''' (typo ? in kdenlive)  unchecked = absolute transform, checked = relative transform
-shakiness - how shaky is the video. Default = 4
+'''zoom''' - additional zoom during transform default = 0
-invert - invert the transform. default = unchecked
+'''shakiness''' - how shaky is the video. Default = 4
-sharpen - sharpen transformed image. Default = 0.8
+'''invert''' - invert the transform. default = unchecked
-stepsize - step size of Detection process minimum around - default = 6
+'''sharpen''' - sharpen transformed image. Default = 0.8
-show 0= draw nothing, 1 or 2 = show fields and transforms. default = 0
+'''stepsize''' - step size of Detection process minimum around - default = 6
-mincontrast below this contrast - the field is discarded.   default =0.3
+'''show''' 0= draw nothing, 1 or 2 = show fields and transforms. default = 0
-smoothing = number of frames for lowpass filtering default =10
+'''mincontrast''' below this contrast - the field is discarded.   default =0.3
-maxshift maxiumum number of pixels to shift default = -1
+'''smoothing''' = number of frames for lowpass filtering default =10
-crop unchecked = keep border, checked = black background. default = unchecked
+'''maxshift''' maximum number of pixels to shift default = -1
+'''crop''' unchecked = keep border, checked = black background. default = unchecked