Script is working for basic patterns
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node_modules
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# frameoloom
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Node script to generate flicker videos by interweaving frames from multiple videos
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--------
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## Requirements
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This script relies on `ffmpeg` to export and stitch video back together
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Installation instructions for ffmpeg here: https://github.com/adaptlearning/adapt_authoring/wiki/Installing-FFmpeg
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## Installation
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git clone https://github.com/sixteenmillimeter/videoloom.git
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cd videoloom
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chmod +x videoloom
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npm install
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## Usage
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./videoloom -i /path/to/video1:/path/to/video2 -o /path/to/output
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#!/usr/bin/env node
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'use strict';
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const execRaw = require('child_process').exec;
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const os = require('os');
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const path = require('path');
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const program = require('commander');
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const fs = require('fs-extra');
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let TMPDIR = os.tmpdir() || '/tmp';
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let TMPPATH;
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async function exec (cmd) {
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return new Promise((resolve, reject) => {
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return execRaw(cmd, (err, stdio, stderr) => {
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if (err) return reject(err);
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return resolve(stdio);
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});
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});
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}
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async function clear () {
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let exists;
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try {
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exists = await fs.exists(TMPPATH);
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} catch (err) {
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console.error(err)
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}
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if (exists) {
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console.log(`Clearing tmp directory ${TMPPATH}`)
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try {
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await exec(`rm -r "${TMPPATH}"`)
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} catch (err) {
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//suppress error
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}
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}
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try {
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await fs.mkdir(TMPPATH)
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} catch (Err) {
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console.error(err);
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}
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}
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async function frames (video, order) {
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let ext = 'tif';
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let tmpoutput;
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let cmd;
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tmpoutput = path.join(TMPPATH, `export-%05d_${order}.${ext}`);
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cmd = `ffmpeg -i "${video}" -compression_algo raw -pix_fmt rgb24 "${tmpoutput}"`
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console.log(`Exporting ${video} as single frames...`)
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try {
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await exec(cmd)
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} catch (err) {
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console.error('Error exporting video', err)
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return process.exit(3)
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}
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return path.join(TMPPATH, `export_${order}`);
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}
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function zeroPad (i, max = 5) {
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let len = (i + '').length;
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let str = i + '';
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for (let x = 0; x < max - len; x++) {
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str = '0' + str;
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}
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return str;
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}
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async function reorder (pattern, realtime) {
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let frames;
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let old;
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let seqFile;
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let seq;
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console.log('Weaving frames...')
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try {
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frames = await fs.readdir(TMPPATH)
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} catch (err) {
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console.error('Error reading tmp directory', err)
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}
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console.dir(frames)
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frames = frames.filter (file =>{
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if (file.indexOf('.tif') !== -1) return true;
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});
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//other patterns
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try {
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seq = await patternSort(frames, pattern, realtime)
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} catch (err) {
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console.error('Error sorting frames')
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}
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console.dir(seq)
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//
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}
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function groupAlt (list, pattern, realtime) {
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let groups = [];
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let newList = [];
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let frameCount = 0;
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let oldPath;
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let newName;
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let newPath;
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let ext = path.extname(list[0]);
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for (let g of pattern) {
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groups.push([]);
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}
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for (let i = 0; i < list.length; i++) {
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groups[i % pattern.length].push(list[i]);
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}
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for (let x = 0; x < list.length; x++) {
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for (let g of pattern) {
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for (let i = 0; i < g; i++) {
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/*oldPath = path.join(TMPPATH, list[i]);
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newName = `./render_${zeroPad(frameCount)}${ext}`;
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newPath = path.join(TMPPATH, newName);
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console.log(`Renaming ${list[i]} -> ${newName}`);
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try {
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//fs.renameSync(oldPath, newPath)
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newList.push(newName);
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} catch (err) {
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console.error(err);
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}*/
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frameCount++
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}
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}
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}
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return newList
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}
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async function patternSort (list, pattern, realtime = false) {
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let frameCount = 0;
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let stepCount;
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let step;
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let skipCount;
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let skip;
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let alt;
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let ext = path.extname(list[0]);
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let oldPath;
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let newName;
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let newPath;
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let newList = [];
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for (let el of pattern) {
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if (el !== 1) alt = true;
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}
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if (realtime) {
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skip = false;
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skipCount = pattern.length + 1;
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}
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if (!alt) {
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for (let i = 0; i < list.length; i++) {
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if (realtime) {
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skipCount--;
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if (skipCount === 0) {
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skip = !skip;
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skipCount = pattern.length;
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}
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}
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oldPath = path.join(TMPPATH, list[i]);
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if (skip) {
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console.log(`Skipping ${list[i]}`);
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try {
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await fs.unlink(oldPath)
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} catch (err) {
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console.error(err);
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}
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continue;
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}
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newName = `./render_${zeroPad(frameCount)}${ext}`;
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newPath = path.join(TMPPATH, newName);
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console.log(`Renaming ${list[i]} -> ${newName}`);
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try {
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await fs.rename(oldPath, newPath)
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newList.push(newName);
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} catch (err) {
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console.error(err);
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}
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frameCount++;
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}
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} else {
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newList = groupAlt(list, pattern, realtime);
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}
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return newList
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}
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async function render (output) {
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let exp = path.join(TMPPATH, `render_%05d.tif`);
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let resolution = '1920x1080';
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let h264 = `-vcodec libx264 -g 1 -crf 25 -pix_fmt yuv420p`;
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let prores = `-c:v prores -profile:v 3 -c:a pcm_s16le - g 1`;
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let format = (output.indexOf('.mov') !== -1) ? prores : h264;
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const cmd = `ffmpeg -r 24 -f image2 -s ${resolution} -i ${exp} ${format} -y ${output}`;
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console.log(`Exporting video ${output}`);
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console.log(cmd);
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try {
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await exec(cmd);
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} catch (err) {
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console.error(err);
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}
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}
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async function main (arg) {
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let input = arg.input.split(':');
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let output = arg.output;
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let pattern = [];
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let realtime = false;
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console.time('frameloom');
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if (input.length < 2) {
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console.error('Must provide more than 1 input');
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return process.exit(1);
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}
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if (!output) {
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console.error('Must provide video output path');
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return process.exit(2);
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}
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if (arg.pattern) {
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pattern = arg.pattern.split(':');
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pattern = pattern.map(el =>{
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return parseInt(el);
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})
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} else {
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for (let i = 0; i <input.length; i++) {
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pattern.push(1);
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}
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}
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if (arg.realtime) realtime = true;
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TMPPATH = path.join(TMPDIR, 'frameloom');
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try {
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await clear()
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} catch (err) {
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console.error(err);
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return process.exit(3)
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}
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console.log(`Processing video files ${input.join(', ')} into ${output} with pattern ${pattern.join(':')}`)
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for (let i = 0; i <input.length; i++) {
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try {
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await frames(input[i], i)
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} catch (err) {
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console.error(err);
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}
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}
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try {
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await reorder(pattern, realtime)
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} catch (err) {
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console.error(err)
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}
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try {
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await render(output)
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} catch (err) {
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console.error(err)
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}
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try {
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await clear()
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} catch (err) {
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console.error(err);
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return process.exit(3)
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}
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console.timeEnd('frameloom')
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}
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program
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.version('1.0.0')
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.option('-i, --input [files]', 'Specify input videos with paths seperated by colon')
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.option('-o, --output [file]', 'Specify output path of video')
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.option('-p, --pattern [pattern]', 'Specify a pattern for the flicker 1:1 is standard')
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.option('-r, --realtime', 'Specify if videos should preserve realtime speed')
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.option('-t, --tmp [dir]', 'Specify tmp directory for exporting frames')
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.option('-a, --avconv', 'Specify avconv if preferred to ffmpeg')
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.parse(process.argv);
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main(program)
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{
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"name": "frameloom",
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"version": "1.0.0",
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"lockfileVersion": 1,
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"requires": true,
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"dependencies": {
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"commander": {
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"version": "2.19.0",
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"resolved": "https://registry.npmjs.org/commander/-/commander-2.19.0.tgz",
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"integrity": "sha512-6tvAOO+D6OENvRAh524Dh9jcfKTYDQAqvqezbCW82xj5X0pSrcpxtvRKHLG0yBY6SD7PSDrJaj+0AiOcKVd1Xg=="
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},
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"fs-extra": {
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"version": "7.0.1",
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"resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-7.0.1.tgz",
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"integrity": "sha512-YJDaCJZEnBmcbw13fvdAM9AwNOJwOzrE4pqMqBq5nFiEqXUqHwlK4B+3pUw6JNvfSPtX05xFHtYy/1ni01eGCw==",
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"requires": {
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"graceful-fs": "^4.1.2",
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"jsonfile": "^4.0.0",
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"universalify": "^0.1.0"
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}
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},
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"graceful-fs": {
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"version": "4.1.15",
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"resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.1.15.tgz",
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"integrity": "sha512-6uHUhOPEBgQ24HM+r6b/QwWfZq+yiFcipKFrOFiBEnWdy5sdzYoi+pJeQaPI5qOLRFqWmAXUPQNsielzdLoecA=="
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},
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"jsonfile": {
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"version": "4.0.0",
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"resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-4.0.0.tgz",
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"integrity": "sha1-h3Gq4HmbZAdrdmQPygWPnBDjPss=",
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"requires": {
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"graceful-fs": "^4.1.6"
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}
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},
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"universalify": {
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"version": "0.1.2",
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"resolved": "https://registry.npmjs.org/universalify/-/universalify-0.1.2.tgz",
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"integrity": "sha512-rBJeI5CXAlmy1pV+617WB9J63U6XcazHHF2f2dbJix4XzpUF0RS3Zbj0FGIOCAva5P/d/GBOYaACQ1w+0azUkg=="
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}
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}
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}
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@ -0,0 +1,15 @@
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{
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"name": "frameloom",
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"version": "1.0.0",
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"description": "Node script to generate flicker videos by interweaving frames from multiple videos",
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"main": "index.js",
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"scripts": {
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"test": "echo \"Error: no test specified\" && exit 1"
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},
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"author": "sixteenmillimeter",
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"license": "MIT",
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"dependencies": {
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"commander": "^2.19.0",
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"fs-extra": "^7.0.1"
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}
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}
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