如何在Android中使用ffmpeg庫來裁剪視頻？

要裁剪在Android應用視頻我使用ffmpeg庫如何在Android中使用ffmpeg庫來裁剪視頻？

在SO example我發現用於裁剪視頻以下命令：

的ffmpeg -i in.mp4 -filter：V「作物= out_w： out_h：X：Y」 out.mp4

我創建了一個字符串數組：

字符串[] CMD = { 「的ffmpeg」，「-i」，originalVid eoPath，「-vf」，「\」crop =「+ imageWidth +」：「+ imageHeight +」：「+ xCoordinate +」：「+ yCoordinate +」\「」，「-c：a」，「copy」， croppedVideoPath};

我通過這個數組execute（）方法：

try { 
      ffmpeg = FFmpeg.getInstance(getContext()); 
      ffmpeg.execute(cmd, new ExecuteBinaryResponseHandler() { 

       @Override 
       public void onStart() { 
        Log.i(TAG, "onStart: Crop Video started"); 
       } 

       @Override 
       public void onProgress(String message) { 
        Log.i(TAG, "onProgress: " + message); 
       } 

       @Override 
       public void onFailure(String message) { 
        Log.i(TAG, "onFailure: " + message); 
       } 

       @Override 
       public void onSuccess(String message) { 
        Log.i(TAG, "onSuccess: " + message); 
       } 

       @Override 
       public void onFinish() { 
        Log.i(TAG, "onFinish: Video cropping finished"); 
       } 
      }); 
     } catch (FFmpegCommandAlreadyRunningException e) { 
      // Handle if FFmpeg is already running 
      Log.i(TAG, "doInBackground: Exception + Device is not supported"); 
     }

日誌的結果是：

12-14 11:33:33.246 5731-5731/com.studioidan.dmc I/CropImageFragment: onStart: Crop Video started 
12-14 11:33:33.246 5731-5731/dmc I/CropImageFragment: onProgress: ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers 
12-14 11:33:33.246 5731-5731/dmc I/CropImageFragment: onProgress: built with gcc 4.8 (GCC) 
12-14 11:33:33.246 5731-5731/dmc I/CropImageFragment: onProgress: 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= 
12-14 11:33:33.246 5731-5731/dmc I/CropImageFragment: onProgress: libavutil  55. 17.103/55. 17.103 
12-14 11:33:33.246 5731-5731/dmc I/CropImageFragment: onProgress: libavcodec  57. 24.102/57. 24.102 
12-14 11:33:33.246 5731-5731/dmc I/CropImageFragment: onProgress: libavformat 57. 25.100/57. 25.100 
12-14 11:33:33.246 5731-5731/dmc I/CropImageFragment: onProgress: libavdevice 57. 0.101/57. 0.101 
12-14 11:33:33.246 5731-5731/dmc I/CropImageFragment: onProgress: libavfilter  6. 31.100/6. 31.100 
12-14 11:33:33.246 5731-5731/dmc I/CropImageFragment: onProgress: libswscale  4. 0.100/4. 0.100 
12-14 11:33:33.246 5731-5731/dmc I/CropImageFragment: onProgress: libswresample 2. 0.101/2. 0.101 
12-14 11:33:33.246 5731-5731/dmc I/CropImageFragment: onProgress: libpostproc 54. 0.100/54. 0.100 
12-14 11:33:33.316 5731-5731/dmc I/CropImageFragment: onProgress: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/DMC/diamondVideo.mp4': 
12-14 11:33:33.316 5731-5731/dmc I/CropImageFragment: onProgress: Metadata: 
12-14 11:33:33.316 5731-5731/dmc I/CropImageFragment: onProgress:  major_brand  : isom 
12-14 11:33:33.316 5731-5731/dmc I/CropImageFragment: onProgress:  minor_version : 0 
12-14 11:33:33.316 5731-5731/dmc I/CropImageFragment: onProgress:  compatible_brands: isom3gp4 
12-14 11:33:33.316 5731-5731/dmc I/CropImageFragment: onProgress:  creation_time : 2016-12-14 08:33:10 
12-14 11:33:33.316 5731-5731/dmc I/CropImageFragment: onProgress: Duration: 00:00:05.14, start: 0.000000, bitrate: 13480 kb/s 
12-14 11:33:33.316 5731-5731/dmc I/CropImageFragment: onProgress:  Stream #0:0(eng): Video: h264 (Baseline) (avc1/0x31637661), yuv420p, 1280x720, 13824 kb/s, SAR 1:1 DAR 16:9, 29.96 fps, 30 tbr, 90k tbn, 180k tbc (default) 
12-14 11:33:33.316 5731-5731/dmc I/CropImageFragment: onProgress:  Metadata: 
12-14 11:33:33.316 5731-5731/dmc I/CropImageFragment: onProgress:  creation_time : 2016-12-14 08:33:10 
12-14 11:33:33.316 5731-5731/dmc I/CropImageFragment: onProgress:  handler_name : VideoHandle 
12-14 11:33:33.316 5731-5731/dmc I/CropImageFragment: onProgress:  Stream #0:1(eng): Audio: aac (LC) (mp4a/0x6134706D), 48000 Hz, stereo, fltp, 96 kb/s (default) 
12-14 11:33:33.316 5731-5731/dmc I/CropImageFragment: onProgress:  Metadata: 
12-14 11:33:33.316 5731-5731/dmc I/CropImageFragment: onProgress:  creation_time : 2016-12-14 08:33:10 
12-14 11:33:33.316 5731-5731/dmc I/CropImageFragment: onProgress:  handler_name : SoundHandle 
12-14 11:33:33.316 5731-5731/dmc I/CropImageFragment: onProgress: [NULL @ 0x433f5f40] Unable to find a suitable output format for 'ffmpeg' 
12-14 11:33:33.316 5731-5731/dmc I/CropImageFragment: onProgress: ffmpeg: Invalid argument 
12-14 11:33:33.326 5731-5731/dmc I/CropImageFragment: onFailure: 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 
                   Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/DMC/diamondVideo.mp4': 
                    Metadata: 
                    major_brand  : isom 
                    minor_version : 0 
                    compatible_brands: isom3gp4 
                    creation_time : 2016-12-14 08:33:10 
                    Duration: 00:00:05.14, start: 0.000000, bitrate: 13480 kb/s 
                    Stream #0:0(eng): Video: h264 (Baseline) (avc1/0x31637661), yuv420p, 1280x720, 13824 kb/s, SAR 1:1 DAR 16:9, 29.96 fps, 30 tbr, 90k tbn, 180k tbc (default) 
                    Metadata: 
                     creation_time : 2016-12-14 08:33:10 
                     handler_name : VideoHandle 
                    Stream #0:1(eng): Audio: aac (LC) (mp4a/0x6134706D), 48000 Hz, stereo, fltp, 96 kb/s (default) 
                    Metadata: 
                     creation_time : 2016-12-14 08:33:10 
                     handler_name : SoundHandle 
                   [NULL @ 0x433f5f40] Unable to find a suitable output format for 'ffmpeg' 
                   ffmpeg: Invalid argument 
12-14 11:33:33.326 5731-5731/dmc I/CropImageFragment: onFinish: Video cropping finished

但是，當我從命令的數組中刪除的ffmpeg

String [] cmd = {「-i」，originalVideoPath，「-vf」，「\」crop =「+ imageWidth +」：「+ imageHeight +」：「+ xC oordinate +「：」+ yCoordinate +「\」「，」-c：a「，」copy「，croppedVideoPath};

執行它之後，結果是：

12-14 11:56:46.366 25930-26592/dmc I/CropImageFragment: onStart: Crop Video started 
12-14 11:56:46.426 25930-25930/dmc I/CropImageFragment: onProgress: ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers 

12-14 11:56:46.426 25930-25930/dmc I/CropImageFragment: onProgress: built with gcc 4.8 (GCC) 

12-14 11:56:46.426 25930-25930/dmc I/CropImageFragment: onProgress: 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= 
12-14 11:56:46.426 25930-25930/dmc I/CropImageFragment: onProgress: libavutil  55. 17.103/55. 17.103 
12-14 11:56:46.426 25930-25930/dmc I/CropImageFragment: onProgress: libavcodec  57. 24.102/57. 24.102 
    12-14 11:56:46.426 25930-25930/dmc I/CropImageFragment: onProgress: libavformat 57. 25.100/57. 25.100 
    12-14 11:56:46.426 25930-25930/dmc I/CropImageFragment: onProgress: libavdevice 57. 0.101/57. 0.101 
    12-14 11:56:46.426 25930-25930/dmc I/CropImageFragment: onProgress: libavfilter  6. 31.100/6. 31.100 
    12-14 11:56:46.426 25930-25930/dmc I/CropImageFragment: onProgress: libswscale  4. 0.100/4. 0.100 
    12-14 11:56:46.426 25930-25930/dmc I/CropImageFragment: onProgress: libswresample 2. 0.101/2. 0.101 
    12-14 11:56:46.426 25930-25930/dmc I/CropImageFragment: onProgress: libpostproc 54. 0.100/54. 0.100 
    12-14 11:56:46.506 25930-25930/dmc I/CropImageFragment: onProgress: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/DMC/diamondVideo.mp4': 
    12-14 11:56:46.506 25930-25930/dmc I/CropImageFragment: onProgress: Metadata: 
    12-14 11:56:46.506 25930-25930/dmc I/CropImageFragment: onProgress:  major_brand  : isom 
    12-14 11:56:46.506 25930-25930/dmc I/CropImageFragment: onProgress:  minor_version : 0 
    12-14 11:56:46.506 25930-25930/dmc I/CropImageFragment: onProgress:  compatible_brands: isom3gp4 
    12-14 11:56:46.506 25930-25930/dmc I/CropImageFragment: onProgress:  creation_time : 2016-12-14 08:56:40 
    12-14 11:56:46.506 25930-25930/dmc I/CropImageFragment: onProgress: Duration: 00:00:05.27, start: 0.000000, bitrate: 13189 kb/s 
    12-14 11:56:46.506 25930-25930/dmc I/CropImageFragment: onProgress:  Stream #0:0(eng): Video: h264 (Baseline) (avc1/0x31637661), yuv420p, 1280x720, 13886 kb/s, SAR 1:1 DAR 16:9, 30.01 fps, 30 tbr, 90k tbn, 180k tbc (default) 
    12-14 11:56:46.506 25930-25930/dmc I/CropImageFragment: onProgress:  Metadata: 
    12-14 11:56:46.506 25930-25930/dmc I/CropImageFragment: onProgress:  creation_time : 2016-12-14 08:56:40 
    12-14 11:56:46.506 25930-25930/dmc I/CropImageFragment: onProgress:  handler_name : VideoHandle 
    12-14 11:56:46.506 25930-25930/dmc I/CropImageFragment: onProgress:  Stream #0:1(eng): Audio: aac (LC) (mp4a/0x6134706D), 48000 Hz, stereo, fltp, 96 kb/s (default) 
    12-14 11:56:46.506 25930-25930/dmc I/CropImageFragment: onProgress:  Metadata: 
    12-14 11:56:46.506 25930-25930/dmc I/CropImageFragment: onProgress:  creation_time : 2016-12-14 08:56:40 
    12-14 11:56:46.506 25930-25930/dmc I/CropImageFragment: onProgress:  handler_name : SoundHandle

它看起來像過程開始，它凍結

後，我做什麼錯了？

來源

2016-12-14 Dylan

我自己的實現：

private void cropVideo(String originalVideoPath, String croppedVideoPath, int xCoordinate, 
         int yCoordinate, int imageWidth, int imageHeight, int croppedAngle) { 
    String command; 
    ffmpegCommand = new StringBuilder(); 
    ffmpegCommand.append("-y"); 
    ffmpegCommand.append(" "); 
    ffmpegCommand.append("-i"); 
    ffmpegCommand.append(" "); 
    ffmpegCommand = getFFmpegCommand(ffmpegCommand, imageWidth, imageHeight, 
      xCoordinate, yCoordinate, originalVideoPath, croppedVideoPath, croppedAngle); 
    command = ffmpegCommand.toString(); 

    Log.i(TAG, command); 
    String[] cmd = command.split(" "); 

    new CropVideoTask().execute(cmd); 

} 

private StringBuilder getFFmpegCommand(StringBuilder ffmpegCommand, int imageWidth, 
              int imageHeight, int xCoordinate, int yCoordinate, 
              String originalVideoPath, String croppedVideoPath, int angle) { 
     int x = 0; 
     int y = 0; 
     int w = 0; 
     int h = 0; 
     String rotate = ""; 
     switch (angle) { 
      case 0: 
       x = xCoordinate; 
       y = yCoordinate; 
       w = imageWidth; 
       h = imageHeight; 
       break; 
      case 90: 
       x = yCoordinate; 
       y = mFileWidth - imageWidth - xCoordinate; 
       w = imageHeight; 
       h = imageWidth; 
       rotate = ",transpose=1"; 
       break; 
      case 180: 
       x = mFileHeight - imageWidth - xCoordinate; 
       y = mFileWidth - imageHeight - yCoordinate; 
       w = imageWidth; 
       h = imageHeight; 
       rotate = ",vflip"; 
       break; 
      case -90: 
       x = mFileHeight - imageHeight - yCoordinate; 
       y = xCoordinate; 
       w = imageHeight; 
       h = imageWidth; 
       rotate = ",transpose=2"; 
       break; 
     } 

     ffmpegCommand.append(originalVideoPath); 
     ffmpegCommand.append(" "); 
     ffmpegCommand.append("-vf"); 
     ffmpegCommand.append(" "); 
     ffmpegCommand.append("crop="); 
     ffmpegCommand.append(w); 
     ffmpegCommand.append(":"); 
     ffmpegCommand.append(h); 
     ffmpegCommand.append(":"); 
     ffmpegCommand.append(x); 
     ffmpegCommand.append(":"); 
     ffmpegCommand.append(y); 
     ffmpegCommand.append(rotate); 
     ffmpegCommand.append(" "); 
     ffmpegCommand.append(croppedVideoPath); 

     return ffmpegCommand; 
    } 

private class CropVideoTask extends AsyncTask<String[], Void, Void> { 
     protected Void doInBackground(String[]... cmd) { 
      try { 
       ffmpeg = FFmpeg.getInstance(getContext()); 
       ffmpeg.execute(cmd[0], new ExecuteBinaryResponseHandler() { 

        @Override 
        public void onStart() { 
        } 

        @Override 
        public void onProgress(String message) { 
        } 

        @Override 
        public void onFailure(String message) { 

        } 

        @Override 
        public void onSuccess(String message) { 
         // Do something with the cropped video     
        } 

        @Override 
        public void onFinish() { 

        } 
       }); 
      } catch (FFmpegCommandAlreadyRunningException e) { 
       Log.i(TAG, "doInBackground: Exception + Device is not supported"); 
      } 
      return null; 
     } 
    }

來源

2016-12-23 09:36:08 Dylan

如何在Android中使用ffmpeg庫來裁剪視頻？

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