Node-fluent-ffmpeg: info.percent returns undefined

Created on 1 Jun 2016 · 16Comments · Source: fluent-ffmpeg/node-fluent-ffmpeg

Hello, i have this code, i want to show the percentage of the conversion
`

    var infs = fs.createReadStream(path);
    var self = this;
    var command = ffmpeg(infs);

    command.on('end', function() {
        return cb(null);
    });

    command.on('error', function() {
        return cb(err);
    });

    command.on('progress', function(info) {
         console.log('progress ' + info.percent + '%');
    });

    command.save(dest);`

and it show undefined in the console: 'progress undefined%'

To investigate

Source

LazyFatArrow

Most helpful comment

I too get progress undefined% when doing this:

var ffmpeg = require('fluent-ffmpeg')

var proc = ffmpeg('C:\\Users\\ErraticFox\\Desktop\\me.mp4')

  .on('progress', function(info) {
  console.log('progress ' + info.percent + '%');
  })

  .on('end', function() {
    console.log('file has been converted succesfully');
  })

  .on('error', function(err) {
    console.log('an error happened: ' + err.message);
  })

  .save('C:\\Users\\ErraticFox\\Desktop\\output.mp3');

What am I doing wrong?

ErraticFox on 15 Jun 2016

👍3 ❤1

All 16 comments

You cannot get the progress percent when using a stream as an input.

njoyard on 1 Jun 2016

but that was taken from the example folder in the ffmpeg repo, can you give an example on how to do it please

LazyFatArrow on 3 Jun 2016

Replace

    var infs = fs.createReadStream(path);
    var self = this;
    var command = ffmpeg(infs);

with

    var command = ffmpeg(path);

njoyard on 4 Jun 2016

I too get progress undefined% when doing this:

var ffmpeg = require('fluent-ffmpeg')

var proc = ffmpeg('C:\\Users\\ErraticFox\\Desktop\\me.mp4')

  .on('progress', function(info) {
  console.log('progress ' + info.percent + '%');
  })

  .on('end', function() {
    console.log('file has been converted succesfully');
  })

  .on('error', function(err) {
    console.log('an error happened: ' + err.message);
  })

  .save('C:\\Users\\ErraticFox\\Desktop\\output.mp3');

What am I doing wrong?

ErraticFox on 15 Jun 2016

👍3 ❤1

Can you please show ffmpeg output (use the 'stderr' event) ?

njoyard on 15 Jun 2016

Stderr output: ffmpeg version N-80129-ga1953d4 Copyright (c) 2000-2016 the FFmpeg developers
Stderr output:   built with gcc 5.3.0 (GCC)
Stderr output:   configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmfx --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
Stderr output:   libavutil      55. 24.100 / 55. 24.100
Stderr output:   libavcodec     57. 43.100 / 57. 43.100
Stderr output:   libavformat    57. 37.101 / 57. 37.101
Stderr output:   libavdevice    57.  0.101 / 57.  0.101
Stderr output:   libavfilter     6. 46.100 /  6. 46.100
Stderr output:   libswscale      4.  1.100 /  4.  1.100
Stderr output:   libswresample   2.  0.101 /  2.  0.101
Stderr output:   libpostproc    54.  0.100 / 54.  0.100
Stderr output: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\Users\ErraticFox\Desktop\me.mp4':
Stderr output:   Metadata:
Stderr output:     major_brand     : mp42
Stderr output:     minor_version   : 0
Stderr output:     compatible_brands: mp41isom
Stderr output:     creation_time   : 2016-06-08 04:59:12
Stderr output:     date            : 2016
Stderr output:   Duration: 00:00:08.22, start: 0.000000, bitrate: 5677 kb/s
Stderr output:     Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt470m), 1920x1080 [SAR 1:1 DAR 16:9], 5483 kb/s, 58.66 fps, 59.94 tbr, 60k tbn (default)
Stderr output:     Metadata:
Stderr output:       creation_time   : 2016-06-08 04:59:12
Stderr output:       handler_name    : VideoHandler
Stderr output:       encoder         : AVC Coding
Stderr output:     Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 186 kb/s (default)
Stderr output:     Metadata:
Stderr output:       creation_time   : 2016-06-08 04:59:12
Stderr output:       handler_name    : SoundHandler
Stderr output: [mp3 @ 0000000002b7f020] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
Stderr output: Output #0, mp3, to 'C:\Users\ErraticFox\Desktop\output.mp3':
Stderr output:   Metadata:
Stderr output:     major_brand     : mp42
Stderr output:     minor_version   : 0
Stderr output:     compatible_brands: mp41isom
Stderr output:     TDRC            : 2016
Stderr output:     TSSE            : Lavf57.37.101
Stderr output:     Stream #0:0(und): Audio: mp3, 48000 Hz, stereo, fltp (default)
Stderr output:     Metadata:
Stderr output:       creation_time   : 2016-06-08 04:59:12
Stderr output:       handler_name    : SoundHandler
Stderr output:       encoder         : Lavc57.43.100 libmp3lame
Stderr output: Stream mapping:
Stderr output:   Stream #0:1 -> #0:0 (aac (native) -> mp3 (libmp3lame))
Stderr output: Press [q] to stop, [?] for help
Stderr output: size=     128kB time=00:00:08.16 bitrate= 128.3kbits/s speed=71.8x
progress undefined%
Stderr output: video:0kB audio:128kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.265012%
Stderr output:
file has been converted succesfully

ErraticFox on 15 Jun 2016

UPDATE: So I got it to work, _somewhat_.

This is how I'm showing the percentage. Unfortunately, this only works when converting to mp3. Any reason why this is?

        .on('stderr', function(line) {
            var res = inputDir.split(" ")

            if (line.trim().startsWith('Duration')) {
                var match = line.trim().match(/Duration:\s\d\d\:\d\d:\d\d/).toString().split('Duration:').slice(1).toString().split(':');
                duration = +match[0] * 60 * 60 + +match[1] * 60 + +match[2];
            } else if (line.trim().startsWith('size=')) {
                match = line.trim().match(/time=\d\d\:\d\d:\d\d/).toString().split('time=').slice(1).toString().split(':');
                var seconds = +match[0] * 60 * 60 + +match[1] * 60 + +match[2];
                percent = seconds / duration;
                percent = (percent * 100).toFixed()
                $('#percent').html(percent + '%')
                $('.determinate').css('width', percent + '%')
                console.log(`stderr: ${line}`)
                console.log(`${percent}%`)
            }
        })

ErraticFox on 19 Jun 2016

❤1

I _think_ the reason is just that your first example may be too short for a progress event.

njoyard on 19 Jun 2016

The conversion is too short? I don't think that would be that case, considering I'm using a two plus hour long movie to test this haha.

ErraticFox on 19 Jun 2016

It seems like I have the same kind of problem, with a small variation, the 1st video I transcode got the percent correctly set but not the next. If I restart my node app it works correctly again for the 1st video and not the following...

gregaubert on 13 Jul 2016

@gregaubert are you using a different command instance ?

njoyard on 15 Jul 2016

No I'm using a different command instance but with nearly the same options except the source video and target

gregaubert on 15 Jul 2016

maybe its something to do with the latest ffmpeg version !!

LazyFatArrow on 15 Jul 2016

@ThaCoderr I don't think so, but I need to investigate this further (don't have much time though)

njoyard on 17 Jul 2016

The progress is calculated with the duration of the media using ffprobe command (here and here) this only executes ffprobe and saves the data in _ffprobeData, asynchronously, the duration is extracted here so if ffprobe executes after this, duration is 0, thus making porcentage here undefined.

One way to solve this is moving the duration calculation to the utils.extractProgress funciton:

  // duration is not needed now
  extractProgress: function(command, stderrLine) {
    var progress = parseProgressLine(stderrLine);
    if (progress) {
      // build progress report object
      var ret = {
        frames: parseInt(progress.frame, 10),
        currentFps: parseInt(progress.fps, 10),
        currentKbps: progress.bitrate ? parseFloat(progress.bitrate.replace('kbits/s', '')) : 0,
        targetSize: parseInt(progress.size, 10),
        timemark: progress.time
      };
      // calculate percent progress using _ffprobeData when available
      if (command._ffprobeData && command._ffprobeData.format && command._ffprobeData.format.duration) {
        var duration = Number(command._ffprobeData.format.duration);
        if (!isNaN(duration))
          ret.percent = (utils.timemarkToSeconds(ret.timemark) / duration) * 100;
      }
      command.emit('progress', ret);
    }
  }