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Allow for clips to be split with content outside of start/end timeframe #115
Description
Description of Problem & Solution
When using -start and -end, the tool defines the area of a video to be processed. In some cases, however, you may wish to limit the area to be analyzed, but treat the area outside of that window as part of the split files.
Example, 30 minute file with one scene break at 15 minutes:
0-------------13-15-17--------------30
---------------**|**------------------
In the current tool, a command such as scenedetect -i somevideo.mp4 time -s 00:13:00 -e 00:15:00 detect-threshold split-video -c will produce two clips, each of 2 minute duration.
However, in some cases you may wish to have two 15 minute clips, including the content before and after the processed duration.
Proposed Implementation:
A proposed command line to enable this would be -expand-split-clips
Alternative Solutions:
Using the timecodes generated can be fed into ffmpeg and executed manually / via a script.
Activity
Breakthrough commentedon Sep 1, 2019
This should definitely be possible to add to PySceneDetect, thanks for the suggestion @charlesvestal.
Technical notes for myself (or anyone else who wants to take a crack at this) which may be useful:
get_scenes_from_cuts()function called by the SceneManager, passing 0 for the start time and the video length for the end time to achieve the desired outcome (the only difficulty being getting the video length)detect_scenes()to support getting the video lengthgetmethod to obtain VideoCapture properties can be somewhat unreliable (thus internally it is only used for estimation of progress, but video streams are processed until exhausted)SeekToEnd()needs to be implemented to the VideoManager to manually seek to the end and get this number in the case where-expand-split-clipsis passedAdd --expand-to-video flag to split-video (#115) (#551)
[docs] Update changelog re: #115