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• FFMPEG Output to DeckLink Duo 2

  28 mars 2017, par Harry

  Im trying to use FFMPEG to stream out to my Decklink duo 2 but im unable to do so.

  Heres the command that im trying:

  ffmpeg -f decklink -i "DeckLink Duo (1)@5"
  -pix_fmt uyvy422 -r 25000/1000 "DeckLink Duo (3)"
  

  I tried just sending color bars as an output but it still doesnt work

  Command:

  ffmpeg -f lavfi -i color=color=red -t 10000 "DeckLink Duo (3)"
  

  Both Result:

  ffmpeg version N-82794-g3ab1311 Copyright (c) 2000-2016 the FFmpeg developers
    built with gcc 5.4.0 (GCC)
    configuration: --enable-gpl --enable-version3 --disable-w32threads
   --enable-dxva2 --enable-libmfx --enable-nvenc 
  --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r 
  --enable-gnutls --enable-iconv --enable-libass 
  --enable-libbluray --enable-libbs2b --enable-libcaca 
  --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc 
  --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb 
  --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg 
  --enable-libopus --enable-librtmp --enable-libschroedinger 
  --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora 
  --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc 
  --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp 
  --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg
   --enable-lzma --enable-decklink --enable-zlib
    libavutil      55. 42.100 / 55. 42.100
    libavcodec     57. 67.100 / 57. 67.100
    libavformat    57. 58.102 / 57. 58.102
    libavdevice    57.  2.100 / 57.  2.100
    libavfilter     6. 68.100 /  6. 68.100
    libswscale      4.  3.101 /  4.  3.101
    libswresample   2.  4.100 /  2.  4.100
    libpostproc    54.  2.100 / 54.  2.100
  Input #0, lavfi, from 'color=color=red':
    Duration: N/A, start: 0.000000, bitrate: N/A
      Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 320x240 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
  
  [NULL @ 00000000025745a0] Unable to find a suitable output format for 'DeckLink Duo (3)'
  DeckLink Duo (3): Invalid argument
  

  Any Suggestions or help to solve this is much appreciated.

• How to Play a Video file in javacv / javacpp

  28 mars 2017, par Floesmaan

  Does someone have some example code to play a simple video file with the current javaCPP/javaCV version and the FFmpegFrameGrabber?

  I tried this solution, but its apparently too old and does not work with the current javacv version because of an incompatible FrameGrabber interface (returns a "Frame"-Object instead of an "IplImage"-Object). If I change the code manually (using Frame instead of IplImage), it returns the error message:

  java.lang.VerifyError: Bad type on operand stack
  Exception Details:
    Location:
      org/bytedeco/javacv/FFmpegFrameGrabber.startUnsafe()V @1291: invokespecial
    Reason:
      Type 'org/bytedeco/javacpp/avutil$AVFrame' (current frame, stack[2]) is not assignable to 'org/bytedeco/javacpp/Pointer'
    Current Frame:
      bci: @1291
      flags: { }
      locals: { 'org/bytedeco/javacv/FFmpegFrameGrabber', integer, 'org/bytedeco/javacpp/avformat$AVInputFormat', 'org/bytedeco/javacpp/avutil$AVDictionary', integer, 'org/bytedeco/javacpp/avcodec$AVCodec', integer, integer, integer, integer }
      stack: { uninitialized 1283, uninitialized 1283, 'org/bytedeco/javacpp/avutil$AVFrame' }
    Bytecode:
      0x0000000: 2a01 b500 332a bb00 8659 01b7 0087 b500............
  

  FYI: I'm comparing different java libraries for playing video files and extract their pixel data (xuggler, vlcj, ...) and search for the best one. I really like to include javacv in my tests but it's not working :(

• what is the meaning of "sw" in libswscale of ffmpeg ?

  28 mars 2017, par synyo xu

  In FFMpeg, we always say hello to libswscale and libswresample, but, what is the meaning of sw in libswscale and libswresample?

• Is there a more efficient way to watermark and join videos in bulk through ffmpeg ?

  28 mars 2017, par Neo Herakles

  I have this batch file using ffmpeg to add a logo to my videos and then add an intro but it's taking anywhere from 10 hours to a day depending on how many I have to watermark, is there a more efficient way to achieve this? The videos sometimes have different resolutions so I can't remove the conversion to the 1280*720 size.

  for %%I in ("C:\Users\Administrator\Desktop\work\*.mp4") do ffmpeg.exe -y -i "%%I" -i white.png -filter_complex "[0:v]scale=iw:ih[v0];[1:v][v0]scale2ref=iw/6:ih/18[logo][0v];[0v][logo]overlay=W-w-3:H-h-1[v]" -map "[v]" -map 0:a -codec:v libx264 -preset ultrafast -crf 23 -codec:a copy "C:\Users\Administrator\Desktop\Complete-videos\%%~nI.mp4"
  
  for %%I in ("C:\Users\Administrator\Desktop\work\*.mp4") do ffmpeg -y -i %%I -c copy -vbsf h264_mp4toannexb -f mpegts -s 1280*720 %%I.ts && ffmpeg -y -i "concat:out1.ts|%%I.ts|out1.ts" -c:v libx264 -strict experimental -bsf:a aac_adtstoasc -ar 48000 -r 20 "C:\Users\Administrator\Desktop\Complete-videos\%%~nI.mp4"
  pause
  

• Can not copy RTSP streamed video in android using FFMPEG [on hold]

  28 mars 2017, par user711457

  I am developing an android application. In my application I wanted to record live streamed video using ffmpeg library. I write one code for record live streamed video but it does't work. It shows some error. If any one know this please help me.

  This is the code I am used to record video

  try {
  
          fFmpeg.execute(new String[]{"ffmpeg -i rtsp://192.168.1.1:6667/streamhd -acodec copy -vcode c copy"+String.valueOf(getCacheDir())+"/MyVideo.mp4"}, new ExecuteBinaryResponseHandler() {
  
              @Override
              public void onSuccess(String message) {
                  Log.d("fffffff", "FFmpeg cmd success");
              }
  
              @Override
              public void onFailure(String message) {
                  Log.d("ffffffffffff", message.toString());
              }
          });
      }catch (FFmpegCommandAlreadyRunningException e) {
          // Handle if FFmpeg is already running
          e.printStackTrace();
          Log.w(null,e.toString());}
  

  when I execute this block I get the following error message.

  03-27 12:48:47.109 2042-2042/com.steelmanpro.wifivideoscope D/ffffffffffff: 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
                                                                      Output #0, mp4, to 'ffmpeg -i rtsp://192.168.1.1:6667/streamhd -acodec copy -vcode c copy/data/data/com.steelmanpro.wifivideoscope/cache/MyVideo.mp4':
                                                                      Output file #0 does not contain any stream