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• FFmpeg batch convert multiple files

  11 mars 2019, par John

  This command works great :

  ffmpeg \
  
  -i /mnt/share/Movies2/"nameofmovie.mkv" \
  
  -map 0:0 \
  
  -map 0:1 \
  
  -map 0:2 \
  
  -c:v libx264 \
  
  -preset veryfast \
  
  -tune film \
  
  -crf 18 \
  
  -c:a:0 copy \
  
  -c:a:1 copy \
  
  /mnt/share/Converted/"nameofmovie".mkv

  But i want to either be able to read the input file from a text file or to run this command one after another for each file i want to convert. Is there a script i can set up to do this ? Not all the files are in the same folder or the same format so something where i could just change the file name and format would be great. I used to have a bash script that could do this for an entire folder but that’s not what i am trying to do here. I am using Ubuntu server 18.04
  Also i’m pretty new to this i’ve found this for a whole folder :

  for i in *.avi;
  
  do name=`echo $i | cut -d'.' -f1`;
  
  echo $name;
  
  ffmpeg -i "$i" "${name}.mov";
  
  done

  But i dont know how to adapt this for individual files

• It's possible to catch ffmpeg errors with python ?

  4 avril 2019, par Elros Romeo

  Hi I’m trying to make a video converter for django with python, I forked django-ffmpeg module which does almost everything I want, except that doesn’t catch error if conversion failed.

  Basically the module passes to the command line interface the ffmpeg command to make the conversion like this :

  /usr/bin/ffmpeg -hide_banner -nostats -i %(input_file)s -target
  film-dvd %(output_file)

  Module uses this method to pass the ffmpeg command to cli and get the output :

  def _cli(self, cmd, without_output=False):
  
      print 'cli'
  
      if os.name == 'posix':
  
          import commands
  
          return commands.getoutput(cmd)
  
      else:
  
          import subprocess
  
          if without_output:
  
              DEVNULL = open(os.devnull, 'wb')
  
              subprocess.Popen(cmd, stdout=DEVNULL, stderr=DEVNULL)
  
          else:
  
              p = subprocess.Popen(cmd, stdout=subprocess.PIPE)
  
              return p.stdout.read()

  But for example, I you upload an corrupted video file it only returns the ffmpeg message printed on the cli, but nothing is triggered to know that something failed

  This is an ffmpeg sample output when conversion failed :

  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x237d500] Format mov,mp4,m4a,3gp,3g2,mj2
  detected only with low score of 1, misdetection possible !
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x237d500] moov atom not found
  /home/user/PycharmProjects/videotest/media/videos/orig/270f412927f3405aba041265725cdf6b.mp4 :
  Invalid data found when processing input

  I was wondering if there’s any way to make that an exception and how, so I can handle it easy.

  The only option that came to my mind is to search : "Invalid data found when processing input" in the cli output message string but I’m not shure that if this is the best approach. Anyone can help me and guide me with this please.

• Command failed ffmpeg in Lambda function (Node js)

  14 février 2019, par Arun

  I am trying to convert a video file to an audio file inside the lambda function. But I keep getting FFmpeg command failed error. I put FFmpeg binary exe file inside the project directory. but still, I am getting the same error. I tried this ( Lambda not connecting to ffmpeg ) but my issue is not solving yet. Any helps ?? thanks,

  Here is my lambda function code

  process.env.PATH = process.env.PATH + ':/tmp/';
  
  process.env['FFMPEG_PATH'] = '/tmp/ffmpeg';
  
  const BIN_PATH = process.env['LAMBDA_TASK_ROOT'];
  
  process.env['PATH'] = process.env['PATH'] + ':' + BIN_PATH;
  
  
  
  const fs = require('fs');
  
  const AWS = require('aws-sdk');
  
  
  
  AWS.config.update({
  
      region : 'us-east-2'
  
  });
  
  const s3 = new AWS.S3({apiVersion: '2006-03-01'});
  
  
  
  
  
  exports.handler = (event, context, callback) => {
  
      require('child_process').exec(
  
          'cp /var/task/ffmpeg /tmp/.; chmod 755 /tmp/ffmpeg;',
  
          function (error, stdout, stderr) {
  
              if (error) {
  
                  console.log('Erro occured',error);
  
              } else {
  
                  var ffmpeg = require('ffmpeg');
  
                  var params = {
  
                      Bucket: "bucket_name",
  
                      Key: event.Records[0].s3.object.key
  
                  };
  
                  s3.getObject(params, function(err, data) {
  
                      if (err) {
  
                          console.log("Error", err);
  
                      }
  
                      fs.writeFile("/tmp/vid.mp4", data.Body, function (err) {
  
                          if (err) console.log(err.code, "-", err.message);
  
                          return callback(err);
  
                      }, function() {
  
                          try {
  
                              var stats = fs.statSync("/tmp/vid.mp4");
  
                              console.log("size of the file1 ", stats["size"]);
  
                              try {
  
                                  console.log("Yeah");
  
                                  var process = new ffmpeg('/tmp/vid.mp4');
  
                                  process.then(function (video) {
  
                                      // Callback mode
  
                                      console.log("video function ", video);
  
                                      video.fnExtractSoundToMP3('/tmp/video.mp3', function (error, file) {
  
                                          if (!error)
  
                                              console.log('Audio file: ' + file);
  
                                          else console.log('error video ', error);
  
                                      });
  
                                  }, function (err) {
  
                                      console.log('Error: ' + err);
  
                                  });
  
                              } catch (e) {
  
                                  console.log(e.code);
  
                                  console.log(e.msg);
  
                              }
  
                          } catch (e) {
  
                              console.log("file is not complete", e);
  
                          }
  
                      });
  
                      return callback(err);
  
                  });
  
              }
  
          }
  
      )
  
  }

  Error message

  { Error: Command failed: ffmpeg -i /tmp/vid.mp4 -vn -ar 44100 -ac 2 -ab 192 -f mp3 /tmp/video.mp3
  
  
  
      at ChildProcess.exithandler (child_process.js:275:12)
  
      at emitTwo (events.js:126:13)
  
      at ChildProcess.emit (events.js:214:7)
  
      at maybeClose (internal/child_process.js:925:16)
  
      at Process.ChildProcess._handle.onexit (internal/child_process.js:209:5)
  
      killed: false,
  
          code: null,
  
      signal: 'SIGSEGV',
  
      cmd: 'ffmpeg -i /tmp/vid.mp4 -vn -ar 44100 -ac 2 -ab 192 -f mp3 /tmp/video.mp3' }