ffmpeg how do I get the duration onto the node.js?

Question

Ok I know how to get the duration of a video in ffmpeg using this command

ffmpeg -i ./output/sample.mp4 2>&1 | grep Duration | cut -d ' ' -f 4 | sed s/,//

I run this command through a function in node but this outputs the duration onto the console, how do I get it onto node.js where I need it?

• TGrif: What does your nodejs code look like ?
• Ricky: I have a package that runs console commands for me. It looks like this let getDuration = () => { cmd.run('ffmpeg -i ./output/trying.mp4 2>&1 | grep Duration | cut -d \' \' -f 4 | sed s/,//')}

Answer 1

There is a way to read console output stream, but I would prefer to use fluent-ffmpeg: https://github.com/fluent-ffmpeg/node-fluent-ffmpeg

It is a npm module for nodejs.

From here you can call ffprobe (a tool shipped with ffmpeg and better than ffmpeg to get informations about a video), like this:

var ffmpeg = require('fluent-ffmpeg');
ffmpeg.ffprobe('./input.mp4', function(err, metadata) {
 //console.dir(metadata); // all metadata
 console.log(metadata.format.duration);
});

Answer 2

var ffmpeg = require('ffmpeg');
app.get('/getVideoDuration', (req, res) => {
 fs.unlink('public/output.mp4')
 try {
 new ffmpeg('public/input.mov', function (err, video) {
 if (!err) {
 console.log(video.metadata.duration.seconds, "video")
 res.send({
 'msg': "Success",
 'duration': video.metadata.duration.seconds
 })
 }
 });
 } catch (e) {
 console.log(e.code);
 console.log(e.msg);
 }
})