2d:null 2e:["$","title",null,{"children":"YOLO Object Detection in Video Streams | Neil Turley | Observable"}] 33:[] 31:{"id":"6c1b45aaae66bb7a","slug":"yolo-object-detection-in-video-streams","title":"YOLO Object Detection in Video Streams","thumbnail":"b23da60081f44ee1ec5bbc537ee4cb641e7fc14180f36bbd653270de9d73d374","access_level":"public","create_time":"$D2020-06-08T18:36:45.516Z","update_time":"$D2020-06-09T11:24:58.290Z","view_time":null,"first_public_time":"$D2020-06-09T11:25:26.960Z","has_unpublished_edits":null,"fork":false,"stars":0,"starred":false,"owner":{"type":"team","id":"d3a5c7e199005588","login":"nturley","name":"Neil Turley","avatar_url":"https://avatars-next.observableusercontent.com/1144dcde8da195bed152315b9c34a7cd1cc33f52ca513a9b8582d9a077aff812","tier":"starter_2024"},"version":67,"publish_version":67,"role":null,"authored":false,"authors":[{"type":"individual","id":"08c0e1b672bab3d7","login":"nturley","name":"Neil Turley","avatar_url":"https://avatars-next.observableusercontent.com/1144dcde8da195bed152315b9c34a7cd1cc33f52ca513a9b8582d9a077aff812","tier":null}],"members":[{"type":"individual","id":"08c0e1b672bab3d7","login":"nturley","name":"Neil Turley","avatar_url":"https://avatars-next.observableusercontent.com/1144dcde8da195bed152315b9c34a7cd1cc33f52ca513a9b8582d9a077aff812","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":1,"collection":null,"type":"notebook","body":{"title":"YOLO Object Detection in Video Streams","cells":[{"id":0,"value":"md`# YOLO Object Detection in Video Streams`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":24,"value":"v = {\n let vid = html`

`;\n torrent.files.find(file => file.name.endsWith('.mp4')).renderTo(vid);\n return vid;\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":53,"value":"md`# Object Detection\nWe screenshot a frame every second and run object detection on it. On a fast computer we could probably keep up with framerate.\n`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":31,"value":"{\n let context = DOM.context2d(320, 127);\n context.drawImage(v, 0,0, 320, 127);\n context.strokeStyle = \"#f00\"\n context.fillStyle = '#f00'\n objs.forEach(o => {\n let x = o.x *320;\n let y = o.y * 127;\n let w = o.w * 320;\n let h = o.h * 127;\n context.strokeRect(x, y, w, h)\n context.fillText(o.label, x+w/2, y+h/2)\n })\n return context.canvas;\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":16,"value":"html`\n

Download Speed: ${filesize(torrentInfo.downloadSpeed)}/s
Upload Speed: ${filesize(torrentInfo.uploadSpeed)}/s
Peers: ${torrentInfo.numPeers}

\n\nProgress: ${(torrentInfo.progress*100).toFixed(1)}%`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":34,"value":"objs = {\n torrentInfo;\n return objectDetector.detect((err, results) => err ? results: err);\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":2,"value":"webtorrent = require('https://cdn.jsdelivr.net/npm/webtorrent@latest/webtorrent.min.js')","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":6,"value":"wt = new webtorrent()","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":8,"value":"filesize = require('filesize')","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":10,"value":"torrentId = 'magnet:?xt=urn:btih:08ada5a7a6183aae1e09d831df6748d566095a10&dn=Sintel&tr=udp%3A%2F%2Fexplodie.org%3A6969&tr=udp%3A%2F%2Ftracker.coppersurfer.tk%3A6969&tr=udp%3A%2F%2Ftracker.empire-js.us%3A1337&tr=udp%3A%2F%2Ftracker.leechers-paradise.org%3A6969&tr=udp%3A%2F%2Ftracker.opentrackr.org%3A1337&tr=wss%3A%2F%2Ftracker.btorrent.xyz&tr=wss%3A%2F%2Ftracker.fastcast.nz&tr=wss%3A%2F%2Ftracker.openwebtorrent.com&ws=https%3A%2F%2Fwebtorrent.io%2Ftorrents%2F&xs=https%3A%2F%2Fwebtorrent.io%2Ftorrents%2Fsintel.torrent'","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":12,"value":"torrentInfo = {\n while (true) {\n yield Promises.tick(1000, torrent);\n }\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":14,"value":"torrent = {\n // if the client already has this torrent, return it\n let torrent = wt.get(torrentId)\n if (torrent) return torrent;\n // otherwise get it using the torrentId\n return new Promise((resolve, reject) => {\n wt.add(torrentId, resolve)\n })\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":27,"value":"ml5 = require('https://unpkg.com/ml5@0.4.3/dist/ml5.min.js')","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":29,"value":"objectDetector = ml5.YOLO(v, {}, () => {});","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"}],"files":"$W33","stdlib":"1","titling":"auto"}} 32:"$31:body"