video-slide-extractor

Two simple scripts to extract keyframes with set number of changes and then filter out frames with faces

You've listened to a great talk and you would like to go over slides and include them in your notes. You don't want to watch the whole video again, so you:

• Extract keyframes that are likely to contain new slides (extract-frames.sh)
• If the conference has good production, you filter out every slide that has faces. Since this is fuzzy, you can go over two directories - faces/ and the original directory (filter-faces.sh)

Installation

You need opencv, including contrib for filtering faces, facedetect and ffmpeg.

Usage

Extract by simply running the script:

extract-frame.sh path-to-video.mp4

Output slides will be in path-to-video-slides/

You can customize how it works

extract-frame.sh path-to-video.mp4 output-slides 0.4

This will extract keyframes that changed 40% or more over the previous keyframe and resulting slides are saved into output-slides/

Go to output directory and run

filter-faces.sh *.png

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