Recherche avancée

Sur d’autres sites (4931)

• fluent-ffmpeg concatenate audio files

  8 septembre 2020, par Martin

  I am trying to use fluent-ffmpeg with my electron app to concatenate multiple audio files together with an image in a video. So if i have three files :

  


  song1.mp3 1:00
song2.mp3 0:30
song3.mp3 2:00
front.jpg

  


  I could create output.mp4 which would be 3:30 seconds long, and play each file one after the other in order. With front.jpg set as the background image.

  


  I have succesfully been able to render a single audio file with an image file, but havent been able to render multiple audio files together yet into a video.

  


  Here is my concat attempt :

  


  const command = ffmpeg();
       
            const audioFiles = ['C:\\Users\\marti\\Documents\\martinradio\\uploads\\Movers - 1970 greatest hits vol. 2\\01 back from the moon.mp3', 'C:\\Users\\marti\\Documents\\martinradio\\uploads\\Movers - 1970 greatest hits vol. 2\\02 love me not.mp3'];
            audioFiles.forEach((fileName)=>{
                command.input(fileName);
            })
            command
                    .complexFilter([
                        '[0]adelay=1000|1000[a]',
                        '[1]adelay=4000|4000[b]',
                        '[a][b]amix=2'
                    ])
                    .input(imgPath)
                    .videoCodec('copy')
                    .save('C:\\Users\\marti\\Documents\\martinradio\\uploads\\Movers - 1970 greatest hits vol. 2\\concat-autio.mp4')
                    .on('codecData', function(data) {
                        console.log('codecData=',data);
                    })
                    .on('progress', function({ percent }) {
                        console.log('progress percent: ' + percent);
                    })
                    .on('end', function() {
                        console.log('file has been converted succesfully');
                    })
                    .on('error', function(err) {
                        console.log('an error happened: ' + err.message);
                    })
                    command.run()


  


  When I run it I can see in my console it start, run, and end.

  


  

  


  My example uses two audio files :

  


  01 back from the moon.mp3 02:31
02 love me not.mp3' 02:35

  


  So my output file should be 05:06 in length, but my output is only 02:39 in length


  


• Split video into images with ffmpeg-python

  29 décembre 2022, par sgt pepper

  As far as I understand ffmpeg-python is main package in Python to operate ffmpeg directly.

  


  Now I want to take a video and save it's frames as separate files at some fps.

  


  There are plenty of command line ways to do it, e.g. ffmpeg -i video.mp4 -vf fps=1 img/output%06d.png described here

  


  But I want to do it in Python. Also there are solutions [1] [2] that use Python's subprocess to call ffmpeg CLI, but it looks dirty for me.

  


  Is there any way to to make it using ffmpeg-python ?

  


• How to get progress percentage of flutter ffmpeg execution

  11 août 2021, par Sharik ansari

  I want to get percentage of ffmpeg execution in flutter

  


  I have some code example but I don't know to do this

  


  ANDROID EXAMPLE :

  


  int start = message.indexOf("time=");
    int end = message.indexOf(" bitrate");
    if (start != -1 && end != -1) {
        String duration = message.substring(start + 5, end);
        if (duration != "") {
            try {
                SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
                sdf.setTimeZone(TimeZone.getTimeZone("UTC"));
                dialog.setProgress((int)sdf.parse("1970-01-01 " + duration).getTime());                        
            }catch (ParseException e)
            {
                e.printStackTrace();
            }
        }
}


  


  FLUTTER CODE :

  


    void statisticsCallback(Statistics statistics) {
print("Statistics: executionId: ${statistics.executionId}, time: ${statistics.time}, size: ${statistics.size}, bitrate: ${statistics.bitrate}, speed: ${statistics.speed}, videoFrameNumber: ${statistics.videoFrameNumber}, videoQuality: ${statistics.videoQuality}, videoFps: ${statistics.videoFps}");
  }


  


  how can I generate progress of execution from statisticsCallback method ?

  


  Please help me out