synopsis-video/index.js

Create Video Synopsis from provided videos. Frames are extracted from each video provided and backgrounds are subtracted around moving elements and merged into a single video for quick review.

const {
    rawDirectory,
    mergedFramesDirectory,
    firstFrameDirectory,
    createBaseFolder,
} = require('./utils.js');
const fs = require('fs');
const { extractFramesFromVideo } = require('./extractFramesFromVideosAndRemoveBackgrounds.js');
const { mergeFramePairs } = require('./mergeFramePairs.js');
const { createVideoFromJpegImages } = require('./createVideoFromMergedFrames.js');

exports.extractFramesFromVideo = extractFramesFromVideo
exports.mergeFramePairs = mergeFramePairs
exports.createVideoFromJpegImages = createVideoFromJpegImages
exports.run = async (options) => {
    if(!options.videos)return console.log('No Videos Provided')
    const videos = options.videos
    // create folders
    createBaseFolder(rawDirectory)
    createBaseFolder(firstFrameDirectory)
    createBaseFolder(mergedFramesDirectory)
    // extract frames and remove backgrounds, BackgroundSubtractorMOG2
    for (let i = 0; i < videos.length; i++) {
        const videoName = videos[i];
        console.log(`Extracting frames from video named "${videoName}.mp4"...`)
        await extractFramesFromVideo(videoName);
        console.log(`Done extracting frames from "${videoName}.mp4"!`)
    }
    // create listing of which frames to overlap then merge them and write into ${rawDirectory}
    console.log("Merging Frames Extracted...")
    const mergeFramePairsResponse = await mergeFramePairs(
         //folder where files are
        rawDirectory,
         //file list (videoNames only, not full path)
        fs.readdirSync(rawDirectory)
    )
    // create a video from merged frames
    console.log("Create Video From Merged Frames...")
    const buildResponse = await createVideoFromJpegImages(
         //folder where files are
        mergedFramesDirectory,
         //file list (filenames only, not full path)
        fs.readdirSync(mergedFramesDirectory),
         //fps
        options.fps || 25
    )
    console.log("Completed Building!")
    console.log(buildResponse)
    return {
        mergeFramePairs: mergeFramePairsResponse,
        videoBuild: buildResponse,
    }
}