video/tests/stacked-frames/tovideo-async.js

A C++ module for node.js that creates Theora/Ogg videos from RGB frames.

var VideoLib = require('video');
var Buffer = require('buffer').Buffer;
var fs = require('fs');
var sys = require('sys');

var chunkDirs = fs.readdirSync('.').sort().filter(
    function (f) {
        return /^\d+$/.test(f);
    }
);

function baseName(fileName) {
    return fileName.slice(0, fileName.indexOf('.'));
}

function rectDim(fileName) {
    var m = fileName.match(/^\d+-rgb-(\d+)-(\d+)-(\d+)-(\d+).dat$/);
    var dim = [m[1], m[2], m[3], m[4]].map(function (n) {
        return parseInt(n, 10);
    });
    return { x: dim[0], y: dim[1], w: dim[2], h: dim[3] }
}

var stackedVideo = new VideoLib.AsyncStackedVideo(720,400);
stackedVideo.setOutputFile('video-async.ogv');
stackedVideo.setTmpDir('./moo');

chunkDirs.forEach(function (dir) {
    console.log(dir);
    var chunkFiles = fs.readdirSync(dir).sort().filter(
        function (f) {
            return /^\d+-rgb-\d+-\d+-\d+-\d+.dat/.test(f);
        }
    );
    chunkFiles.forEach(function (chunkFile) {
        var dims = rectDim(chunkFile);
        var rgb = fs.readFileSync(dir + '/' + chunkFile); // returns buffer
        stackedVideo.push(rgb, dims.x, dims.y, dims.w, dims.h);
    });
    stackedVideo.endPush();
});

console.log('encoding asynchronously... ');

var moo = setInterval(function () {
    process.stdout.write('.');
}, 100);

stackedVideo.encode(function (status, error) {
    clearInterval(moo);
    process.stdout.write('\n');
    if (status) {
        console.log('video successfully written to video-async.ogv');
    }
    else {
        console.log('failed writing video: ' + error);
    }
});