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|ID||Project||Category||View Status||Date Submitted||Last Update|
|0000683||Kdenlive||Effects||public||2009-02-18 23:19||2012-10-22 14:12|
|Priority||normal||Severity||feature||Reproducibility||have not tried|
|Product Version||Recent git|
|Target Version||Fixed in Version|
|Summary||0000683: Automatically break a clip up into individual scenes using motion_est scene detection|
|Description||The motion estimation MLT filter (also used by Automask) has the built-in ability to detect scene changes. It would be a great geewhiz feature if this could be used to break up a clip into individual scenes either at time of import or anytime there after.|
The entire clip will have to be sequentially fed through filer_motion_est.
|Additional Information||A note about speed: Filter motion_est requires a non-trivial number of cycles. The quickest way to speed this up would be to apply the filter to a small fraction of the frame (say the middle 1/9th portion of the frame.) This should not have a significant impact on the quality of the scene detection.|
|Tags||clip management, transform|
|Build/Install Method||Manual build from SVN|
1. One implementation in the interface could be to add a context-menu option for the clips in the project, as "Divide in scenes in a new track".
With this option, create a new empty track and add each detected scene as a cut to that track.
2. Another implementarion in the interface could be a new option to the context-menu in the clip in the track, called "Split in scenes".
With this option, insert a cut to each scene detected.
|I've found that the libstagefright for Android uses a function called "MotionEstimation" to go through all macroblock for motion search and determine scene change detection. This is in the "motion_est.cpp" used for the codec m4v_h263.|
In Ubuntu 12.10 is now included the utility "shotdetect" (scene change detector).
Shotdetect is a software which is able to detect shots and scenes in a movie. The result produced is a simple XML file containing scenes boundary and features. It is also possible to automatically get scenes boundary shots.
This feature is now available in Kdenlive's latest git version (also requires MLT's recent git). Right-click in a clip in project tree and select:
Clip Jobs > Automatic scene split.
Not very fast, but still usefull. feedback welcome
These are very good news.
Let's wait when can be filled the field "Fixed in Version", because of new release of Kdenlive and MLT.
|2009-02-18 23:19||dezeroex||New Issue|
|2009-02-18 23:19||dezeroex||Build/Install Method||=> Manual build from SVN|
|2010-08-11 15:20||LeHomard||Relationship added||duplicate of 0000047|
|2010-08-11 15:20||LeHomard||Status||new => acknowledged|
|2012-10-19 17:27||narcisgarcia||Note Added: 0008505|
|2012-10-19 18:42||narcisgarcia||Note Added: 0008507|
|2012-10-19 18:54||narcisgarcia||Note Added: 0008508|
|2012-10-19 18:57||narcisgarcia||Tag Attached: clip management|
|2012-10-19 18:57||narcisgarcia||Tag Attached: transform|
|2012-10-21 11:49||j-b-m||Note Added: 0008526|
|2012-10-21 11:49||j-b-m||Assigned To||=> j-b-m|
|2012-10-21 11:49||j-b-m||Status||acknowledged => feedback|
|2012-10-22 14:12||narcisgarcia||Note Added: 0008533|
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