fluent-ffmpeg thumbnail creation error

Question

fluent-ffmpeg thumbnail creation error

i try to create a video thumbnail with fluent-ffmpeg here is my code

var ffmpeg = require('fluent-ffmpeg');

exports.thumbnail = function(){
    var proc = new ffmpeg({ source: 'Video/express2.mp4',nolog: true })
    .withSize('150x100')
    .takeScreenshots({ count: 1, timemarks: [ '00:00:02.000' ] }, 'Video/', function(err, filenames) {
    console.log(filenames);
    console.log('screenshots were saved');
  });
}

but i keep getting this error

  "mate data contains no duration, aborting screenshot creation"

any idea why,

by the way am on windows, and i put the ffmpeg folder in c/ffmpeg ,and i added the ffmpeg/bin in to my environment varable， i dont know if fluent-ffmpeg need to know the path of ffmpeg,but i can successfully create a thumbnail with the code below

   exec("C:/ffmpeg/bin/ffmpeg -i Video/" + Name  + " -ss 00:01:00.00 -r 1 -an -vframes 1 -s 300x200 -f mjpeg Video/" + Name  + ".jpg")

please help me!!!

node.js
ffmpeg
thumbnails

Answer 1

FFmpeg needs to know the duration of a video file, while most videos have this information in the file header some file don't, mostly raw videos like a raw H.264 stream.

A simple solution could be to remux the video prior to take the snapshot, the FFmpeg 0.5 command for this task it's quite simple:

ffmpeg -i input.m4v -acodec copy -vcodec copy output.m4v

This command tells FFmpeg to read the "input.m4v" file, to use the same audio encoder and video encoder (no encoding at all) for the output, and to output the data into the file output.m4v.

FFmpeg automatically adds all extra metadata/header information needed to take the snapshot later.