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• ffmpeg crop and watermark in a single step

  11 juin 2018, par rbarab

  We are processing short videos. Most of them are 640x480, recorded by mobile. Many of them have a black frame on left and right.
  I would like to watermark the videos and currently using this command.

  ffmpeg -i IN.mp4 -i WATERMARK.png -filter_complex "overlay=main_w-overlay_w-10:main_h-overlay_h-10" OUT.mp4

  The problem is that if there is a frame, part of the watermark goes on the frame and only a part is on the actual content. Would like to place the watermark on the bottom right of the actual content.

  Are any of these possible, or any other ideas ?

  a, Dynamically detect the black frames and adjust the watermark position accordingly.

  b, Crop the black frame and watermark the content correctly in the same step.

  Thanks a lot for your help !

  EDIT :

  I have found that it won’t be possible in one step.

  1, I can get the crop size

  ffmpeg -i INPUT.mp4 -t 2 -vf cropdetect -f null - 2>&1 | awk '/crop/ { print $NF }' | tail -1

  2, Then crop the video

  ffmpeg -i INPUT.mp4 -filter:v "crop=352:480:144:0" -c:a copy OUTPUT.mp4

  3, Then watermark it

  ffmpeg -i INPUT VIDEO.mp4 -i INPUT IMAGE.png -filter_complex "overlay=main_w-overlay_w-10:main_h-overlay_h-10" OUTPUT VIDEO.mp4

  Is there a way to merge 2, and 3, into a single step ?

• Command for putting watermark on video

  28 juin 2018, par Yupi

  I tried to put watermark on one video but FFmpeg command won’t execute and error code is 3037. I run the same code for trimming video and video is trimmed successfully so there is no issues with inputpath or outputpath also I have ic_watermark.png in assets folder. I tried with image from Drawable but same error code.

  So here is the command which I tried to run and put watermark in right corner :

  String[] cmd = new String[]{"-i", videoInputPath, "-i", imagePath, "-filter_complex", "overlay=main_w-overlay_w-5:main_h-overlay_h-5", videoOutPath };

  and this is the whole method :

  private void executeFFmepg(String inputPath, String outputPath, String customCommand){
  
  final Command command = videoKit.createCommand()
  
          .overwriteOutput()
  
          .inputPath(inputPath)
  
          .outputPath(outputPath)
  
          .customCommand(customCommand)
  
          .experimentalFlag()
  
          .build();
  
   new AsyncCommandExecutor(command, this).execute(); 
  
   }

  I used one library based on FFmpeg : https://github.com/inFullMobile/videokit-ffmpeg-android
  and description says that this is basically invoking FFmpeg main() with CLI arguments.

  This is what I get from Log :

  ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 4.8 (GCC)
  
    configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
  
    libavutil      55. 17.103 / 55. 17.103
  
    libavcodec     57. 24.102 / 57. 24.102
  
    libavformat    57. 25.100 / 57. 25.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 31.100 /  6. 31.100
  
    libswscale      4.  0.100 /  4.  0.100
  
    libswresample   2.  0.101 /  2.  0.101
  
    libpostproc    54.  0.100 / 54.  0.100
  
  05-29 15:35:08.591 24037-24037/com.cleatchaser D/FFmpeg: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/DCIM/Camera/20180406_140202.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 0
  
  05-29 15:35:08.596 24037-24037/com.cleatchaser D/FFmpeg:     compatible_brands: isom3gp4
  
      creation_time   : 2018-04-06 12:02:25
  
    Duration: 00:00:15.06, start: 0.000000, bitrate: 17185 kb/s
  
      Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 17029 kb/s, 29.95 fps, 30 tbr, 90k tbn, 180k tbc (default)
  
  05-29 15:35:08.601 24037-24037/com.cleatchaser D/FFmpeg:     Metadata:
  
        rotate          : 90
  
        creation_time   : 2018-04-06 12:02:25
  
        handler_name    : VideoHandle
  
      Side data:
  
  05-29 15:35:08.606 24037-24037/com.cleatchaser D/FFmpeg:       displaymatrix: rotation of -90.00 degrees
  
      Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 123 kb/s (default)
  
      Metadata:
  
        creation_time   : 2018-04-06 12:02:25
  
  05-29 15:35:08.611 24037-24037/com.cleatchaser D/FFmpeg:       handler_name    : SoundHandle
  
  05-29 15:35:08.756 24037-24037/com.cleatchaser D/FFmpeg: Input #1, png_pipe, from '/storage/emulated/0/watermark.png':
  
    Duration: N/A, bitrate: N/A
  
      Stream #1:0: Video: png, rgba(pc), 856x1324, 25 tbr, 25 tbn, 25 tbc

  I tried many answers from similar questions but none of them worked.

  Is possible that error is in quotes ?

  I don’t have experience with FFmpeg so any help would be very appreciated. Thanks

• ffmpeg auto crop black frame and watermark

  4 juin 2018, par rbarab

  We are processing short videos. Most of them are 640x480, recorded by mobile. Many of them have a black frame on left and right.
  I would like to watermark the videos and currently using this command.

  ffmpeg -i IN.mp4 -i WATERMARK.png -filter_complex "overlay=main_w-overlay_w-10:main_h-overlay_h-10" OUT.mp4

  The problem is that if there is a frame, part of the watermark goes on the frame and only a part is on the actual content. Would like to place the watermark on the bottom right of the actual content.

  Are any of these possible, or any other ideas ?

  a, Dynamically detect the black frames and adjust the watermark position accordingly.

  b, Crop the black frame and watermark the content correctly in the same step.

  Thanks a lot for your help !