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en:vegasscenedetect [2019/06/10 15:39]
hlinke angelegt 		en:vegasscenedetect [2019/07/28 10:36] (aktuell)
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 ====== VEGAS Scene Detect ====== ====== VEGAS Scene Detect ======
  
-uner construction+===== Introduction ===== 
 +Today nearly all Cameras create a new Clip for every scene. Therefore scene detection in video clips does not seem to be needed anymore and most Videoeditors do not provide this function anymore. 
 +This is also the case for VEGAS. 
 + 
 +But what is with situation where you have a  complete video e.g. a scan of a Suoer 8 film or a scan of a VHS video that you would like to have cut into scenes? 
 + 
 +Here comes VegasSceneDetect into the game: 
 + 
 +VegasSceneDetect analyses video clips either in the mediapool or on the timeline and determines scene changes. At each scene change detected VegasScenedetect either cuts the clips or creates a subclip. 
 + 
 +===== Installation ===== 
 +VegasSceneDetect is part of VEGASPython. Please donwload and install VEGASPython from the downloadpage:[[en:vegas_python_download|VEGASPython Download Page]] 
 + 
 +===== Usage of VegasSceneDetect ===== 
 + 
 +VegasSceneDetect is a VEGAS extension and canbe found under Tools -> Extensions -> VegasSceneDetect. See image below (in German) 
 + 
 +{{:en:capture04b1.jpg?direct|}} 
 + 
 +VEGASScenedetect has to working options: 
 +  - create sub clips in the mediapool 
 +  - cut a clip on the timeline 
 + 
 +==== Mediapool ==== 
 +  * Select one or several clips in the mediapool 
 +  * start VegasSceneDetect 
 +  * a PreviewWindow pops up showing the progress of the scenedetection process 
 +    * at the top of the previewFrame is a white progress bar shown 
 +    * each scenecut is shown in the progress bar as a red dot 
 +    * each first frame of a scene is shown in the preview and marked with a red line at the bottom 
 +    * each 100th frame of the video is shown (can be configured) 
 +  * VegasSceneDetect creates a subclip in the mediapool for each detected scene 
 + 
 +This option can be switched off in the configuration file. 
 +==== Timeline ==== 
 +  * Select one or several clips on the timeline 
 +  * start VegasSceneDetect 
 +  * a PreviewWindow pops up showing the progress of the scenedetection process 
 +    * at the top of the previewFrame is a white progress bar shown 
 +    * each scenecut is shown in the progress bar as a red dot 
 +    * each first frame of a scene is shown in the preview and marked with a red line at the bottom 
 +    * each 100th frame of the video is shown (can be configured) 
 +  * VegasSceneDetect cuts the clip and all clips grouped with the main clip on the timeline and regroups the clips to mainatin the relationchip e.g. videoevent and audioevent are grouped - for all new events on the timeline video and audio are grouped again. (similar as cutting a clip on the timeline by hand) 
 + 
 +This option can be switched off in the configuration file. 
 + 
 +==== MediaPool and Timeline ==== 
 +If clips are selected in the mediapool and the on the timeline VegasScenedetect first process the clips in the mediapool and then on the timeline. 
 + 
 +==== Configuration ==== 
 +The behavior or VegasScenedetect can be configured: 
 + 
 +The folder VEGASPython_PN contains a file VegasSceneDetect_config.json. 
 + 
 +This file is a json file that contains the configuration. 
 + 
 +The file can be openend with any text editor like notepad. 
 + 
 +The file looks as follows: 
 + 
 + 
 +{ 
 +    "useHSV": true, 
 +    "showPreview": true, 
 +    "PreviewFrameSkip": 100, 
 +    "showFrameValues": false, 
 +    "threshold": 30, 
 +    "processMediaPool": true, 
 +    "processTimeline": true, 
 +    "progressBarLightness": 255, 
 +    "minSceneLength": 15 
 +} 
 + 
 +Do not change the structure of the file. 
 + 
 +Explanation of the entries: 
 + 
 +    "useHSV": true or false - selects if you want to use HSV or RGB for the comparision process to detect a scene chnage. RGB is faster, HSV may create better results in special situations where the color is similar between scenes. 
 +    "showPreview": true or false - determines if the preview Window should be shown or not 
 +    "PreviewFrameSkip": 100, - Integer value: determines how many frames should be skipped before a frame should be shown in the preview Window. The lower this value the slower is the process. 0 means only the first frame of a scenechange is shown  
 +    "showFrameValues": false, - to determien a better threshold value it is possible to see all calculated values per frame. The values are shown in the "VEGASPython Interactive Window" that you need to open on your own. 
 +    "threshold": 30, - value that determines a scene change. The lower the more changes are determined as scene change.  
 +    "processMediaPool": true or false - if true, clips in the media pool are processed 
 +    "processTimeline": true or false - if true, clips on the timeline are processed - when both optins are true then first all selected clips in the mediapool are processed and then all selected clips on the timeline. 
 +    "progressBarLightness": 255, - lightness of the progress bar 
 +    "minSceneLength": 15 - minimum number of frames between scene changes 
 +     
 +   
 + 
 + 
 + 
 + 

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