Kdenlive/Manual/Clip Menu/Stabilize: Difference between revisions
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[[File:Kdenlive stabilise transcode.png]] | [[File:Kdenlive stabilise transcode.png]] | ||
Based on the tool tips from this screen this what all the options mean: | Based on the tool tips from this screen and the doco [http://public.hronopik.de/vid.stab/features.php?lang=en here] this what all the options mean: | ||
'''optzoom''' = use optimal zoom (calculated from transforms) | '''optzoom''' = use optimal zoom (calculated from transforms) which means that 90% of transformations are hidden. default - checked. | ||
'''accuracy''' = accuracy of shakiness detection - default 4 | '''accuracy''' = accuracy of shakiness detection. Should be >=shakiness factor. 1: low (fast processing) 15: high (slow processing) - default 4 | ||
'''algo''' (= algorithm used) unchecked =brute force. checked= small measurement fields - default = checked | '''algo''' (= algorithm used) unchecked =brute force. checked= small measurement fields - default = checked | ||
'''maxangle''' = maximum angle to rotate - in radians. default = -1 | '''maxangle''' = maximum angle to rotate - in radians. default = -1 which means no limit | ||
'''realtive''' (typo ? in kdenlive) unchecked = absolute transform, checked = relative transform | '''realtive''' (typo ? in kdenlive) unchecked = absolute transform, checked = relative transform | ||
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'''zoom''' - additional zoom during transform default = 0 | '''zoom''' - additional zoom during transform default = 0 | ||
'''shakiness''' - how shaky is the video. Default = 4 | '''shakiness''' - how shaky is the video. and how quick is the camera? 1: little (fast processing) 10: very strong/quick (slow processing) Default = 4 | ||
'''invert''' - invert the transform. default = unchecked | '''invert''' - invert the transform. default = unchecked | ||
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'''sharpen''' - sharpen transformed image. Default = 0.8 | '''sharpen''' - sharpen transformed image. Default = 0.8 | ||
'''stepsize''' - | '''stepsize''' - stepsize of search process, region around minimum is scanned with 1 pixel resolution- default = 6 | ||
'''show''' 0= draw nothing, 1 or 2 = show fields and transforms. default = 0 | '''show''' 0= draw nothing, 1 or 2 = show fields and transforms. Use 1 or 2 to preview what the process is going to do. default = 0 | ||
'''mincontrast''' below this contrast - the field is discarded. | '''mincontrast''' below this contrast - the field is discarded. Range 0-1 default =0.3 | ||
'''smoothing''' = number of frames for lowpass filtering default =10 | '''smoothing''' = number of frames for lowpass filtering. Used to calculate number of frames to be used for lowpass filtering used for stabilizing. Number of frames = smoothing * 2 + 1 default =10 | ||
'''maxshift''' | '''maxshift''' maximal number of pixels to translate image. (default = -1 no limit) | ||
'''crop''' unchecked = | '''crop''' unchecked = The border of the transformed frames contains the pixels from previous frames. Checked = black background. default = unchecked | ||
Revision as of 08:32, 6 January 2013
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 and the doco here this what all the options mean:
optzoom = use optimal zoom (calculated from transforms) which means that 90% of transformations are hidden. default - checked.
accuracy = accuracy of shakiness detection. Should be >=shakiness factor. 1: low (fast processing) 15: high (slow processing) - default 4
algo (= algorithm used) unchecked =brute force. checked= small measurement fields - default = checked
maxangle = maximum angle to rotate - in radians. default = -1 which means no limit
realtive (typo ? in kdenlive) unchecked = absolute transform, checked = relative transform
zoom - additional zoom during transform default = 0
shakiness - how shaky is the video. and how quick is the camera? 1: little (fast processing) 10: very strong/quick (slow processing) Default = 4
invert - invert the transform. default = unchecked
sharpen - sharpen transformed image. Default = 0.8
stepsize - stepsize of search process, region around minimum is scanned with 1 pixel resolution- default = 6
show 0= draw nothing, 1 or 2 = show fields and transforms. Use 1 or 2 to preview what the process is going to do. default = 0
mincontrast below this contrast - the field is discarded. Range 0-1 default =0.3
smoothing = number of frames for lowpass filtering. Used to calculate number of frames to be used for lowpass filtering used for stabilizing. Number of frames = smoothing * 2 + 1 default =10
maxshift maximal number of pixels to translate image. (default = -1 no limit)
crop unchecked = The border of the transformed frames contains the pixels from previous frames. Checked = black background. default = unchecked
This video shows a side by side comparison between vstab and transcode stabilize methods.