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• FFmpeg - cannot find ExecuteBinaryResponseHandler - Android/Java

  20 juillet 2018, par pudility

  I am trying to make a module for react-native that will change a video into a gif. I have little to no experience with android studios/java, but I would love to learn more ! I am using this library to convert the video to a gif. Here is my code :

  package com.reactlibrary;
  
  
  
  import android.widget.Toast;
  
  import com.facebook.react.bridge.ReactApplicationContext;
  
  import com.facebook.react.bridge.ReactContextBaseJavaModule;
  
  import com.facebook.react.bridge.ReactMethod;
  
  import com.github.hiteshsondhi88.libffmpeg.FFmpeg;
  
  
  
  public class RNGifMakerModule extends ReactContextBaseJavaModule {
  
  
  
    private final ReactApplicationContext reactContext;
  
  
  
    public RNGifMakerModule(ReactApplicationContext reactContext) {
  
      super(reactContext);
  
      this.reactContext = reactContext;
  
    }
  
  
  
    @Override
  
    public String getName() {
  
      return "RNGifMakerModule";
  
    }
  
  
  
    @ReactMethod
  
    public void alert(String message) {
  
        Toast.makeText(getReactApplicationContext(), "Error", Toast.LENGTH_LONG).show();
  
        String[] cmd = {"-i"
  
                , message
  
                , "Image.gif"};
  
        conversion(cmd);
  
    }
  
  
  
    public void conversion(String[] cmd) {
  
  
  
      FFmpeg ffmpeg = FFmpeg.getInstance(this.reactContext);
  
  
  
      try {
  
  
  
  
  
        // to execute "ffmpeg -version" command you just need to pass "-version"
  
        ffmpeg.execute(cmd, new ExecuteBinaryResponseHandler() {
  
  
  
          @Override
  
          public void onStart() {
  
          }
  
  
  
          @Override
  
          public void onProgress(String message) {
  
          }
  
  
  
          @Override
  
          public void onFailure(String message) {
  
          }
  
  
  
          @Override
  
          public void onSuccess(String message) {
  
          }
  
  
  
          @Override
  
          public void onFinish() {
  
          }
  
        });
  
      } catch (FFmpegCommandAlreadyRunningException e) {
  
        // Handle if FFmpeg is already running
  
        e.printStackTrace();
  
      }
  
    }
  
  }

  And I get this error :

  Error:(43, 31) error: cannot find symbol class ExecuteBinaryResponseHandler

  This seems odd to be, because in the documentation for ffmpeg-android-java it says to use almost exactly the same code.

  Bounty

  The bounty will be awarded to you if you can find a way to convert a video.mp4 into a gif. You do not necessarily have to use FFmpeg, but your solution has to work with java/android studios.

• cant find out how to make auto exit with ffmpeg in visual studio

  27 juillet 2017, par Beni Blinches

  I have a process which is a song that is playing audio from youtube using ffmpeg, and I want the song to stop when its done. I have this function

  private Process CreateStream(string path)
  
  {
  
      Program.current_s = new Process();
  
      Program.current_s.Exited += new EventHandler(WhenSongEnds);
  
      Program.current_s.StartInfo = new ProcessStartInfo
  
      {
  
          FileName = "cmd.exe",
  
          Arguments = $"/C youtube-dl.exe -o - {path} | ffmpeg -i pipe:0 -ac 2 -f s16le -ar 48000 pipe:1",
  
          UseShellExecute = false,
  
          RedirectStandardOutput = true,
  
          CreateNoWindow = true
  
  
  
      };
  
      Console.WriteLine("                     ffmpeg is ready");
  
      Program.current_s.Start();
  
      return Program.current_s;
  
  }

  I tried to use autoexit and ffplay. But, I cant get it right, because I’m quite unfamiliar with the software

• ffmpeg in android build error,cant find stdout reference

  26 janvier 2018, par 彭灵俊

  configure :

  --arch=arm --disable-gpl
  
  --disable-nonfree --enable-runtime-cpudetect
  
  --disable-gray --disable-swscale-alpha
  
  --disable-programs --disable-ffmpeg 
  
  --disable-ffplay --disable-ffprobe
  
  --disable-ffserver --disable-doc
  
  --disable-htmlpages --disable-manpages
  
  --disable-podpages --disable-txtpages 
  
  --disable-avdevice --enable-avcodec
  
  --enable-avformat --enable-avutil
  
   --enable-swresample --enable-swscale 
  
  --disable-postproc --enable-avfilter
  
   --disable-avresample --enable-network --disable-dxva2 
  
  --disable-vaapi --disable-vda --disable-vdpau 
  
  --disable-encoders --disable-hwaccels
  
  --disable-muxers --disable-devices --disable-iconv 
  
  --enable-protocol=async
  
  --prefix=/Users/sampeng/gitclone/ijkplayer-android/android/contrib/build/ffmpeg-armv5/output 
  
  --cross-prefix=arm-linux-androideabi- 
  
  --enable-cross-compile 
  
  --target-os=android 
  
  --enable-pic 
  
  --enable-asm --enable-inline-asm --enable-optimizations --enable-debug --enable-small

  make and make install is ok.

  but,when I link to one libffmpeg.so,happen some error

  $CC=arm-linux-androideabi-gcc
  FF_C_OBJ_FILES and FF_ASM_OBJ_FILES is ffmpeg *.o file list

  $CC -lm -lz -shared --sysroot=$FF_SYSROOT -Wl,
  
  --no-undefined -Wl,-z,noexecstack $FF_EXTRA_LDFLAGS \
  
  -Wl,-soname,libijkffmpeg.so \
  
  $FF_C_OBJ_FILES \
  
  $FF_ASM_OBJ_FILES \
  
  $FF_DEP_LIBS \
  
   -o $FF_PREFIX/libffmpeg.so

  this while have some error :

  libavfilter/vf_psnr.c:250: error: undefined reference to 'stdout'
  
  libavfilter/vf_psnr.c:382: error: undefined reference to 'stdout'
  
  libavfilter/vf_ssim.c:348: error: undefined reference to 'stdout'
  
  libavfilter/vf_ssim.c:473: error: undefined reference to 'stdout'
  
  libavformat/hls.c:773: error: undefined reference to 'atof'
  
  libavformat/hlsproto.c:149: error: undefined reference to 'atof'
  
  libavutil/file.c:85: error: undefined reference to 'mmap64'
  
  libavutil/log.c:188: error: undefined reference to 'stderr'
  
  libavutil/log.c:362: error: undefined reference to 'stderr'
  
  libavutil/log.c:362: error: undefined reference to 'stderr'

  how to fix this ?