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• 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


  


• ffmpeg missing blend filter

  17 juin 2020, par user2927954

  I am working on android project using ffmpeg library. I followed instruction from : https://github.com/guardianproject/android-ffmpeg to build ffmpeg library for android. All are OK.

  



  Now, i am testing filters that corresponding to video filter of this library such as : drawtext, scale, pad, ... Most of them worked fine, but i have problem with "blend" filter.

  



  I try with commands : ffmpeg -i input1.mp4 -i input2.mp4 -filter_complex blend=all_expr='if(eq(mod(X,2),mod(Y,2)),A,B)' -y out.mp4 and recieve error : no such blend filter.

  



  Do you know how i configure to enable this filter ?

  



  Here is the output result :

  



  ffmpeg version 0.11.1 Copyright (c) 2000-2012 the FFmpeg developers
  built on Feb 27 2014 05:23:20 with gcc 4.6 20120106 (prerelease)
  configuration: --arch=arm --cpu=cortex-a8 --target-os=linux --enable-runtime-cpudetect --prefix=/data/data/info.guardianproject.ffmpeg/app_opt --enable-pic --disable-shared --enable-static --cross-prefix=/home/admin/workspace/android-ndk-r9c/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/bin/arm-linux-androideabi- --sysroot=/home/admin/workspace/android-ndk-r9c/platforms/android-3/arch-arm --extra-cflags='-I../x264 -mfloat-abi=softfp -mfpu=neon' --extra-ldflags=-L../x264 --enable-version3 --enable-gpl --disable-doc --enable-yasm --enable-decoders --enable-encoders --enable-muxers --enable-demuxers --enable-parsers --enable-protocols --enable-filters --enable-avresample --enable-libfreetype --disable-indevs --enable-indev=lavfi --disable-outdevs --enable-hwaccels --enable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --disable-network --enable-libx264 --enable-zlib --enable-muxer=md5
  libavutil      51. 54.100 / 51. 54.100
  libavcodec     54. 23.100 / 54. 23.100
  libavformat    54.  6.100 / 54.  6.100
  libavdevice    54.  0.100 / 54.  0.100
  libavfilter     2. 77.100 /  2. 77.100
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0. 15.100 /  0. 15.100
  libpostproc    52.  0.100 / 52.  0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/videokit/in.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 0
    compatible_brands: isom3gp4
    creation_time   : 2014-03-04 08:53:01
  Duration: 00:00:15.10, start: 0.000000, bitrate: 7055 kb/s
    Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720, 6935 kb/s, SAR 65536:65536 DAR 16:9, 17.18 fps, 34.42 tbr, 90k tbn, 180k tbc
    Metadata:
      creation_time   : 2014-03-04 08:53:01
      handler_name    : VideoHandle
    Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 16000 Hz, stereo, s16, 128 kb/s
    Metadata:
      creation_time   : 2014-03-04 08:53:01
      handler_name    : SoundHandle
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/videokit/7.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2mp41
    creation_time   : 1970-01-01 00:00:00
    encoder         : Lavf53.12.0
    comment         : Courtesy of National Geographic.  Used by Permission.
  Duration: 00:00:04.20, start: 0.000000, bitrate: 1601 kb/s
    Stream #1:0(und): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 320x240 [SAR 1:1 DAR 4:3], 1472 kb/s, 10 fps, 10 tbr, 10 tbn, 10 tbc
    Metadata:
      creation_time   : 1970-01-01 00:00:00
      handler_name    : VideoHandler
    Stream #1:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, s16, 128 kb/s
    Metadata:
      creation_time   : 1970-01-01 00:00:00
      handler_name    : SoundHandler
No such filter: 'blend'
Error configuring filters.


  



  Thanks

  


• 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