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• How to use ffmpeg to find commercial breaks and synchronize faster a subtitle ? [closed]

  2 juin 2021, par zick

  I found this command that help me to find faster the commercial breaks and syncronize faster a subtitle.
But I'm encountering some problems with this command and the first is that the result in the output.txt is in full and I want to be only what was detected (black_duration).

  


  ffmpeg -i "video.mp4" -vf "blackdetect=d=3:pix_th=0" -an -f null - 2>&1 | findstr black_duration > output.txt


  


  The second problem is that I want to be directly the exact timestamps with H:M:S , not in seconds.
For exemple : [blackdetect @ 0000006a59125100] black_start:276.125 black_end:279.125 black_duration:3 , to be [blackdetect @ 0000006a59125100] black_start:00:04:35.000 black_end:00:04:38.000 black_duration:3

  


  The third and last problem is I don't know how to make a batch from that command so I can use it for more than one file.

  


  Exemple of the output.txt

  


  frame=  184 fps=0.0 q=-0.0 size=N/A time=00:00:07.66 bitrate=N/A speed=15.3x    
frame=  388 fps=388 q=-0.0 size=N/A time=00:00:16.16 bitrate=N/A speed=16.1x    
frame=  581 fps=387 q=-0.0 size=N/A time=00:00:24.20 bitrate=N/A speed=16.1x    
frame=  788 fps=394 q=-0.0 size=N/A time=00:00:32.83 bitrate=N/A speed=16.4x    
frame=  988 fps=395 q=-0.0 size=N/A time=00:00:41.16 bitrate=N/A speed=16.4x    
frame= 1193 fps=397 q=-0.0 size=N/A time=00:00:49.70 bitrate=N/A speed=16.5x    
frame= 1382 fps=394 q=-0.0 size=N/A time=00:00:57.58 bitrate=N/A speed=16.4x    
frame= 1582 fps=395 q=-0.0 size=N/A time=00:01:05.91 bitrate=N/A speed=16.4x    
frame= 1776 fps=394 q=-0.0 size=N/A time=00:01:14.00 bitrate=N/A speed=16.4x    
frame= 1970 fps=393 q=-0.0 size=N/A time=00:01:22.08 bitrate=N/A speed=16.4x    
frame= 2174 fps=395 q=-0.0 size=N/A time=00:01:30.58 bitrate=N/A speed=16.4x    
frame= 2373 fps=395 q=-0.0 size=N/A time=00:01:38.87 bitrate=N/A speed=16.4x    
frame= 2562 fps=393 q=-0.0 size=N/A time=00:01:46.75 bitrate=N/A speed=16.4x    
frame= 2748 fps=392 q=-0.0 size=N/A time=00:01:54.50 bitrate=N/A speed=16.3x    
frame= 2943 fps=392 q=-0.0 size=N/A time=00:02:02.62 bitrate=N/A speed=16.3x    
frame= 3128 fps=390 q=-0.0 size=N/A time=00:02:10.33 bitrate=N/A speed=16.3x    
frame= 3310 fps=389 q=-0.0 size=N/A time=00:02:17.91 bitrate=N/A speed=16.2x    
frame= 3501 fps=388 q=-0.0 size=N/A time=00:02:25.87 bitrate=N/A speed=16.2x    
frame= 3681 fps=387 q=-0.0 size=N/A time=00:02:33.37 bitrate=N/A speed=16.1x    
frame= 3869 fps=386 q=-0.0 size=N/A time=00:02:41.20 bitrate=N/A speed=16.1x    
frame= 4074 fps=387 q=-0.0 size=N/A time=00:02:49.75 bitrate=N/A speed=16.1x    
frame= 4256 fps=386 q=-0.0 size=N/A time=00:02:57.33 bitrate=N/A speed=16.1x    
frame= 4443 fps=385 q=-0.0 size=N/A time=00:03:05.12 bitrate=N/A speed=16.1x    
frame= 4634 fps=385 q=-0.0 size=N/A time=00:03:13.08 bitrate=N/A speed=  16x    
frame= 4817 fps=384 q=-0.0 size=N/A time=00:03:20.70 bitrate=N/A speed=  16x    
frame= 5002 fps=384 q=-0.0 size=N/A time=00:03:28.41 bitrate=N/A speed=  16x    
frame= 5199 fps=384 q=-0.0 size=N/A time=00:03:36.62 bitrate=N/A speed=  16x    
frame= 5371 fps=383 q=-0.0 size=N/A time=00:03:43.79 bitrate=N/A speed=15.9x    
frame= 5555 fps=382 q=-0.0 size=N/A time=00:03:51.45 bitrate=N/A speed=15.9x    
frame= 5737 fps=381 q=-0.0 size=N/A time=00:03:59.04 bitrate=N/A speed=15.9x    
frame= 5924 fps=381 q=-0.0 size=N/A time=00:04:06.83 bitrate=N/A speed=15.9x    
frame= 6115 fps=381 q=-0.0 size=N/A time=00:04:14.79 bitrate=N/A speed=15.9x    
frame= 6322 fps=382 q=-0.0 size=N/A time=00:04:23.41 bitrate=N/A speed=15.9x    
frame= 6525 fps=383 q=-0.0 size=N/A time=00:04:31.87 bitrate=N/A speed=15.9x    
[blackdetect @ 0000006a59125100] black_start:276.125 black_end:279.125 black_duration:3
frame= 6727 fps=383 q=-0.0 size=N/A time=00:04:40.29 bitrate=N/A speed=  16x


  


  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

  


• 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