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

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==Стабилизация==
====Стабилизация====


Этот пункт меню доступен из [[Special:MyLanguage/Kdenlive/Manual/Projects_and_Files/Project_Tree#Project Tree - Right Click Menu|контекстного меню]] клипа, находящегося  в дереве проекта или в [[Special:MyLanguage/Kdenlive/Manual/Project_Menu|меню Проект]], когда клип выделен в дереве проекта.
Этот пункт меню доступен из [[Special:MyLanguage/Kdenlive/Manual/Projects_and_Files/Project_Tree#Project Tree - Right Click Menu|контекстного меню]] клипа, находящегося  в дереве проекта или в [[Special:MyLanguage/Kdenlive/Manual/Project_Menu|меню Проект]], когда клип выделен в дереве проекта.
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Эта функция применяет для клипа, алгоритм стабилизации изображения, который может уменьшить дрожание кадра, обусловленное нестабильным положением камеры (например съёмка с рук и т.п.)
Эта функция применяет для клипа, алгоритм стабилизации изображения, который может уменьшить дрожание кадра, обусловленное нестабильным положением камеры (например съёмка с рук и т.п.)


=== stabilize ( vstab) ===
Есть два различных метода стабилизации доступных в'' 'Kdenlive''' - vstab и transcode (перекодировать).


В этом учебнике показано, как использовать функцию стабилизации - vstab версии:
Это видео показывает, рядом сравнение методов стабилизации vstab и transcode .
 
{{#ev:youtube|86SUhodScDE}}
 
 
 
===== Стабилизировать =====
 
[[File:Kdenlive stabilise transcode.png|frame|left|Transcode Dialog in version 0.9.2]]
This menu item was called  ''stabilize (transcode)'' in versions 0.9.2 and earlier.
<br clear=all>
 
 
[[File:Kdenlive Stablise transcode v0.9.3.png|frame|left|Transcode Dialog in version 0.9.3 and higher]]
In version 0.9.3, the transcode GUI was simplified.
<br clear=all>
 
Based on the tooltips from this screen and the docs [http://public.hronopik.de/vid.stab/features.php?lang=en here], this is what all the options mean:
 
'''optzoom''' = use optimal zoom  (calculated from transforms). Causes video to zoom until 90% of transformations are hidden.  Default is checked. Hint: You can further zoom in with the zoom option.


{{#ev:youtube|SWCoqZLJNgY}}
'''accuracy''' = accuracy of shakiness detection. Should be  >= shakiness factor. 1: low (fast processing). 15: high (slow processing).  Default: 4. Recommended: 8.


Настройки "shutter angle"  - расказчик говорит что не знает что это такое (1:35) ... Shutter angle  - это угол съёмки - максимальный угол на который может быть повернуто изображение, подлежащее стабилизации. См. [http://www.mltframework.org/bin/view/MLT/FilterVideostab здесь].
'''algo''' = algorithm used. Checked = small measurement fields. Default = checked. Unchecked means use brute force algorithm. The brute force algorithm is deprecated and this option is not available after version 0.9.3.


=== stabilize (transcode) ===
'''maxangle''' = maximum angle to rotate in radians. Default = -1, which means no limit.


[[File:Kdenlive stabilise transcode.png]]
'''relative'''  Unchecked = absolute transform (don't use this). Checked = relative transform. Default is checked. This option is not available in version 0.9.3 - it uses relative transform.  


Based on the tooltips from this screen and the docs [http://public.hronopik.de/vid.stab/features.php?lang=en here] this what all the options mean:
'''zoom''' - Additional zoom during transform. Percentage to zoom > 0 = zoom in, < 0 = zoom out.  The zoom specified here is in addition to the optimum zoom calculated by the program when optzoom is checked. Default = 0.


'''optzoom''' = use optimal zoom  (calculated from transforms). Causes video to zoom until 90% of transformations are hidden. default - checked.
'''shakiness''' How shaky is the video? And how quick is the camera? 1: little (fast processing). 10: very strong/quick (slow processing). Default = 4. Note: large values may also reduce the accuracy. This is due to the internals of the movement-detection. Typically you don't need a value greater than 7.


'''accuracy''' = accuracy of shakiness detection. Should be  >=shakiness factor. 1: low (fast processing) 15: high (slow processing)  - default 4
'''invert''' Invert the transform. Default = unchecked. Inverting the transform is pointless - leave unchecked. This option is not available in version 0.9.3.


'''algo''' (= algorithm used) unchecked =brute force. checked= small measurement fields - default = checked
'''sharpen''' Sharpen transformed image. Amount of sharpening: 0: no sharpening. Uses filter unsharp with 5x5 matrix. Default = 0.8.


'''maxangle''' = maximum angle to rotate - in radians. default = -1  which means no limit
'''stepsize''' Step size of search process. Region around minimum is scanned with 1 pixel resolution. Default = 6.


'''relative''' unchecked = absolute transform, checked = relative transform. Default is checked.  
'''show''' 0 = draw nothing, 1 or 2 = show fields and transforms.  Use 1 or 2 to preview what the process is going to do.  [http://public.hronopik.de/vid.stab/files/skiing_veryshaky_visualized8_short.ogv example]. Default = 0. Non-zero values of this parameter are not relevant in the '''Kdenlive''' implementation - use zero.  This option is not available in version 0.9.3.


'''zoom''' - Additional zoom during transform. Percentage to zoom > 0 = zoom in, <0 = zoom out. The zoom specified here is additional to the optimum zoom calculated by the program when optzoom is checked. default = 0
'''mincontrast''' Below this contrast, the field is discarded.  Range 0-1. Default = 0.3. You may want to use a smaller value for a really low contrast clip.


'''shakiness''' - how shaky is the video. and how quick is the camera? 1: little (fast processing) 10: very strong/quick (slow processing) Default = 4
'''smoothing''' Controls the amount of smoothing/stabilization. The larger the value for smoothing, the more camera movements are compensated. The resulting clip has a lower change in camera speed.
Technically it is the number of frames for lowpass filtering = (smoothing * 2) + 1.
For example, with a with 25 fps clip, a value of 12 for the smoothing factor means we would smooth over one second - 12 frames behind the current frame + the current frame (1) + 12 frames after the current frame. Default =10.


'''invert''' - invert the transform. default = unchecked
Demo of the difference  [http://public.hronopik.de/vid.stab/files/skiing_veryshaky_short_vs_longsmoothing_above.ogv here]  (top:3, bottom: 30).


'''sharpen''' - sharpen transformed image. amount of sharpening: 0: no sharpening. uses filter unsharp with 5x5 matrix Default = 0.8
'''maxshift''' Maximal number of pixels to translate image. Default = -1. No limit.


'''stepsize''' - step size of search process, region around minimum  is scanned with 1 pixel resolution- default = 6
'''crop''' Unchecked means the border of the transformed frames contains the pixels from previous frames. Checked = black background. Default = unchecked.


'''show''' 0= draw nothing, 1 or 2 = show fields and transforms.  Use 1 or 2 to preview what the process is going to do.  [http://public.hronopik.de/vid.stab/files/skiing_veryshaky_visualized8_short.ogv example] default = 0
Пример работы эффекта стабилизации - transcode с оригиналом автора - Georg Martius


'''mincontrast''' below this contrast - the field is discarded.  Range 0-1 default =0.3
Рядом
{{#ev:youtube|HYE3KAl8RAQ}}


'''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. A larger smoothing means that we transform away more camera movements. The resulting clip has a lower change in camera speed. Demo of the difference  [http://public.hronopik.de/vid.stab/files/skiing_veryshaky_short_vs_longsmoothing_above.ogv here]
Тряска устранена
{{#ev:youtube|c3CEm8bgVQ0}}


'''maxshift''' maximal number of pixels to translate image.    (default = -1 no limit)
Оригинальный
{{#ev:youtube|cRA5H1LYzM4}}


'''crop''' unchecked = The border of the transformed frames contains the pixels from previous frames. Checked = black background. default = unchecked
===== стабилизация ( vstab) =====


Основано на [http://vstab.sourceforge.net/ этой] работе.


This video shows a side by side comparison between vstab and transcode stabilize methods.
В этом учебнике показано, как использовать функцию стабилизации - vstab версии:


{{#ev:youtube|86SUhodScDE}}
{{#ev:youtube|SWCoqZLJNgY}}
 
Настройки "shutter angle"  - расказчик говорит что не знает что это такое (1:35) ... Shutter angle  - это угол съёмки - максимальный угол на который может быть повернуто изображение, подлежащее стабилизации. См. [http://www.mltframework.org/bin/view/MLT/FilterVideostab здесь].





Latest revision as of 15:51, 23 November 2020

Other languages:

Стабилизация

Этот пункт меню доступен из контекстного меню клипа, находящегося в дереве проекта или в меню Проект, когда клип выделен в дереве проекта.

Эта функция применяет для клипа, алгоритм стабилизации изображения, который может уменьшить дрожание кадра, обусловленное нестабильным положением камеры (например съёмка с рук и т.п.)

Есть два различных метода стабилизации доступных в 'Kdenlive' - vstab и transcode (перекодировать).

Это видео показывает, рядом сравнение методов стабилизации vstab и transcode .


Стабилизировать
Transcode Dialog in version 0.9.2

This menu item was called stabilize (transcode) in versions 0.9.2 and earlier.


Transcode Dialog in version 0.9.3 and higher

In version 0.9.3, the transcode GUI was simplified.

Based on the tooltips from this screen and the docs here, this is what all the options mean:

optzoom = use optimal zoom (calculated from transforms). Causes video to zoom until 90% of transformations are hidden. Default is checked. Hint: You can further zoom in with the zoom option.

accuracy = accuracy of shakiness detection. Should be >= shakiness factor. 1: low (fast processing). 15: high (slow processing). Default: 4. Recommended: 8.

algo = algorithm used. Checked = small measurement fields. Default = checked. Unchecked means use brute force algorithm. The brute force algorithm is deprecated and this option is not available after version 0.9.3.

maxangle = maximum angle to rotate in radians. Default = -1, which means no limit.

relative Unchecked = absolute transform (don't use this). Checked = relative transform. Default is checked. This option is not available in version 0.9.3 - it uses relative transform.

zoom - Additional zoom during transform. Percentage to zoom > 0 = zoom in, < 0 = zoom out. The zoom specified here is in addition to the optimum zoom calculated by the program when optzoom is checked. 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. Note: large values may also reduce the accuracy. This is due to the internals of the movement-detection. Typically you don't need a value greater than 7.

invert Invert the transform. Default = unchecked. Inverting the transform is pointless - leave unchecked. This option is not available in version 0.9.3.

sharpen Sharpen transformed image. Amount of sharpening: 0: no sharpening. Uses filter unsharp with 5x5 matrix. Default = 0.8.

stepsize Step size 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. example. Default = 0. Non-zero values of this parameter are not relevant in the Kdenlive implementation - use zero. This option is not available in version 0.9.3.

mincontrast Below this contrast, the field is discarded. Range 0-1. Default = 0.3. You may want to use a smaller value for a really low contrast clip.

smoothing Controls the amount of smoothing/stabilization. The larger the value for smoothing, the more camera movements are compensated. The resulting clip has a lower change in camera speed. Technically it is the number of frames for lowpass filtering = (smoothing * 2) + 1. For example, with a with 25 fps clip, a value of 12 for the smoothing factor means we would smooth over one second - 12 frames behind the current frame + the current frame (1) + 12 frames after the current frame. Default =10.

Demo of the difference here (top:3, bottom: 30).

maxshift Maximal number of pixels to translate image. Default = -1. No limit.

crop Unchecked means the border of the transformed frames contains the pixels from previous frames. Checked = black background. Default = unchecked.

Пример работы эффекта стабилизации - transcode с оригиналом автора - Georg Martius

Рядом

Тряска устранена

Оригинальный

стабилизация ( vstab)

Основано на этой работе.

В этом учебнике показано, как использовать функцию стабилизации - vstab версии:

Настройки "shutter angle" - расказчик говорит что не знает что это такое (1:35) ... Shutter angle - это угол съёмки - максимальный угол на который может быть повернуто изображение, подлежащее стабилизации. См. здесь.