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• How to save file to s3 after processing by ffmpeg using carrierwave

  25 septembre 2013, par loganathan

  I am trying to convert the bit rate of the Mp3 file before uploading to S3, I can able to create version for the mp3 file but the version is not saving in s3 instead original file is uploading to s3.

    version :bitrate_96k do
  
      process :resample => "96"
  
    end
  
  
  
  def resample(bitrate)
  
      tmp_path   = File.join( File.basename(current_path), "tmpfile" )
  
      File.rename current_path, tmp_path
  
      audio_details  = `ffmpeg -i '#{tmp_path}' 2>&1`.split(",").split("\n").flatten
  
      file_bitrate =  audio_details.grep(/bitrate/).grep(/bitrate/).join.split("bitrate: ").last.split("\s").first
  
      unless file_bitrate == bitrate
  
        `ffmpeg -i #{tmp_path.shellescape}  -acodec libmp3lame -y -ab 96k #{current_path.path}`
  
        File.unlink(current_path)
  
       FileUtils.mv(temp_path, current_path)
  
      end
  
    end

• Frame-by-frame video decoding and processing on Android

  22 octobre 2016, par Jason M

  I am working on a project to decode a recorded video on Android into yuv420sp frames with API17 for processing. I have implemented it on Win and iOS with ffmpeg and native api for decoding, respectively. Now I want to reuse the same c++ processing code on Android API17, but found difficulty. I saw straight API to do that in API21, but sadly I have to keep that better compatibility.

  At first, I tried to make the best use of APIs of hardware decoding (following MediaCodec get all frames from video and some others) but found that the data in the outputbuffer does not match that described by the format. For example, I have 1920x1080 frames decoded into yuv420sp but found that y channel actually span 1928x1080. Since I had similar headaches working with still image capturing that was never worked out(YUV image taken from takePicture not match defined format), I am not sure if I may ever solve this.

  Later, I tried to go back to ffmpeg but found most building guides either out of date(for ffmpeg 2.x) or a little hard to understand(such as http://writingminds.github.io/ffmpeg-android/, where they do provide nice pre-built binaries but no instructions on using it. Maybe I should download the sources and use the headers there ?).

  Any suggestions ?

• Invalid data found when processing input

  22 novembre 2012, par user1726619

  I want to use ffmpeg lib in my library.For that purpose,i have successfully compiled it.The input video is otherwise running fine,but when i try to execute any command,i am getting this message :

  Invalid data found when processing input.

  I don't know whats the reason behind it.This is the code :

   public class Videokit extends Activity {
  
          String FilePath;
  
          String OutPut;
  
          Context mycontext;
  
          Videokit vk ;
  
          static 
  
          {
  
              System.loadLibrary("videokit");
  
          }
  
  
  
          public native void run(String[] args);
  
  
  
          public void onCreate(Bundle savedInstanceState) {
  
              super.onCreate(savedInstanceState);
  
              setContentView(R.layout.main);
  
              FilePath =Environment.getExternalStorageDirectory().toString()+"/output.3gp";
  
              try {
  
                  ffmpegrun();
  
              } catch (IOException e) {
  
                  // TODO Auto-generated catch block
  
                  e.printStackTrace();
  
              }
  
          }
  
  
  
          public String ffmpegrun() throws IOException
  
          {
  
              boolean success=false;
  
              File folder = new File(Environment.getExternalStorageDirectory().toString() + "/image-%3d.jpeg");
  
              File file = new File(FilePath);
  
              System.out.println("filepath exists at:"+file.getAbsolutePath());
  
              if (!folder.exists()) {
  
                  success = folder.mkdirs();
  
      //              Toast.makeText(mycontext,"outfile.mp4 exists at"+folder.getAbsolutePath(),Toast.LENGTH_LONG).show();
  
                   OutPut = folder.getAbsolutePath();
  
              }
  
              System.out.println("outfile.flv exists at:"+folder.getAbsolutePath());
  
              run(new String[]{
  
                      "ffmpeg",
  
                      "-i",
  
                      FilePath,
  
                      "-r 1", 
  
                       "-f",
  
                       "image2",
  
                       "image-%3d.jpeg"
  
              }); 
  
              return OutPut;
  
          }
  
      }

  This is the log :

  10-07 17:00:03.707: D/dalvikvm(8760): Trying to load lib /data/data/uk.co.halfninja.videokit/lib/libvideokit.so 0x44e8c958
  
  10-07 17:00:03.837: D/dalvikvm(8760): Added shared lib /data/data/uk.co.halfninja.videokit/lib/libvideokit.so 0x44e8c958
  
  10-07 17:00:03.837: I/Videokit(8760): Loading native library compiled at 13:52:27 Oct  7 2012
  
  10-07 17:00:03.917: I/System.out(8760): filepath exists at:/sdcard/output.3gp
  
  10-07 17:00:03.917: I/System.out(8760): outfile.flv exists at:/sdcard/image-%3d.jpeg
  
  10-07 17:00:03.917: D/dalvikvm(8760): +++ not scanning '/system/lib/libwebcore.so' for 'run' (wrong CL)
  
  10-07 17:00:03.917: D/dalvikvm(8760): +++ not scanning '/system/lib/libmedia_jni.so' for 'run' (wrong CL)
  
  10-07 17:00:03.928: D/dalvikvm(8760): +++ not scanning '/system/lib/libexif.so' for 'run' (wrong CL)
  
  10-07 17:00:03.928: D/Videokit(8760): run() called
  
  10-07 17:00:03.928: D/Videokit(8760): run passing off to main()
  
  10-07 17:00:03.928: D/Videokit(8760): main(): registering all modules
  
  10-07 17:00:03.938: D/Videokit(8760): main(): registered everything
  
  10-07 17:00:03.938: D/Videokit(8760): main(): initting opts
  
  10-07 17:00:03.968: D/Videokit(8760): main(): initted opts.
  
  10-07 17:00:03.968: E/Videokit(8760): ffmpeg version N-30996-gf925b24, Copyright (c) 2000-2011 the FFmpeg developers
  
  10-07 17:00:03.979: E/Videokit(8760):   built on Oct  7 2012 13:52:32 with gcc 4.4.3
  
  10-07 17:00:03.979: E/Videokit(8760):   configuration: --enable-cross-compile --arch=arm5te --enable-armv5te --target-os=linux --disable-stripping --prefix=../output --disable-neon --enable-version3 --disable-shared --enable-static --enable-gpl --enable-memalign-hack --cc=arm-linux-androideabi-gcc --ld=arm-linux-androideabi-ld --extra-cflags='-fPIC -DANDROID -D__thumb__ -mthumb -Wfatal-errors -Wno-deprecated' --disable-everything --enable-decoder=mjpeg --enable-demuxer=mjpeg --enable-parser=mjpeg --enable-demuxer=image2 --enable-muxer=mp4 --enable-encoder=libx264 --enable-libx264 --enable-decoder=rawvideo --enable-protocol=file --enable-hwaccels --disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --disable-network --enable-filter=buffer --enable-filter=buffersink --disable-demuxer=v4l --disable-demuxer=v4l2 --disable-indev=v4l --disable-indev=v4l2 --extra-cflags='-I../x264 -Ivideokit' --extra-ldflags=-L../x264
  
  10-07 17:00:03.987: D/Videokit(8760): main(): parsing options
  
  10-07 17:00:03.987: D/Videokit(8760): parse_options has 7 options to parse
  
  10-07 17:00:04.050: E/Videokit(8760): /sdcard/output.3gp: Invalid data found when processing input
  
  10-07 17:00:04.050: E/Videokit(8760): ffmpeg_exit(1) called!

  Please help me.I am clueless about this problem.Thanks in advance.