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• ffmpeg YUV420 to RGB24 converts only one row

  10 août 2016, par Aleksey

  I’m trying to convert my YUV420p image to RGB24 in c++ and create bitmap from byte array in c#.

  My image size is 1920 w * 1020 h and ffmpeg decoder give me 3 planars for data with linesizes = 1920, 960, 960. But after sws_scale I’m getting RGB picture with only one plane with linesize = 5760.
  It does not looks correct : I should get (5760 * h), not just only one row of data. What I’m doing wrong ?

   //c++ part
  
      if (avcodec_receive_frame(m_decoderContext, pFrame) == 0)
  
      {
  
          //RGB
  
          sws_ctx = sws_getContext(m_decoderContext->width,
  
              m_decoderContext->height,
  
              m_decoderContext->pix_fmt,
  
              m_decoderContext->width,
  
              m_decoderContext->height,
  
              AV_PIX_FMT_RGB24,
  
              SWS_BILINEAR,
  
              NULL,
  
              NULL,
  
              NULL
  
          );
  
  
  
          sws_scale(sws_ctx, (uint8_t const * const *)pFrame->data, pFrame->linesize,
  
              0, pFrame->height,
  
              pFrameRGB->data, pFrameRGB->linesize);
  
  
  
  
  
  //c# part (im reading data from pipe and its equal to c++ part)------------------------------------------------------------------
  
          byte[] rgbch = new byte[frameLen];
  
          for (int i=0; i 0)
  
          {
  
              var arrayHandle = System.Runtime.InteropServices.GCHandle.Alloc(rgbch,
  
      System.Runtime.InteropServices.GCHandleType.Pinned);
  
  
  
              var bmp = new Bitmap(1920, 1080,
  
                  3,
  
                  System.Drawing.Imaging.PixelFormat.Format24bppRgb,
  
                  arrayHandle.AddrOfPinnedObject()
  
              );
  
  
  
              pictureBox1.Image = bmp;
  
          }

• Didn't find class "org.bytedeco.javacpp.avutil" in JAVACV version 1.2 on Android

  26 juillet 2016, par Eloy Palao

  I read a lot of answers but i can’t resolve my bug. The error is :

  java.lang.NoClassDefFoundError: java.lang.ClassNotFoundException: org.bytedeco.javacpp.avutil
  
                                                                         at org.bytedeco.javacpp.Loader.load(Loader.java:469)
  
                                                                         at org.bytedeco.javacpp.Loader.load(Loader.java:409)
  
                                                                         at org.bytedeco.javacpp.avcodec$AVPacket.<clinit>(avcodec.java:1559)
  
                                                                         at org.bytedeco.javacv.FFmpegFrameRecorder.<init>(FFmpegFrameRecorder.java:149)
  
                                                                         at org.bytedeco.javacv.FFmpegFrameRecorder.<init>(FFmpegFrameRecorder.java:126)
  
  </init></init></clinit>

  To configure JAVACV, I only put some lines in the gradle, but i don’t know if i have to do something more to configure it. I read about jniLibs folder, but this grade lines do not generate any folders. Also I read about compileSDKVersion 22 but I did it and do not resolve the problem.

  Please I need help, because I read a lot of post and bugs but any of them resolve me the problem.

      apply plugin: 'com.android.application'
  
  
  
  android {
  
      compileSdkVersion 23
  
      buildToolsVersion '23.0.3'
  
  
  
      defaultConfig {
  
          applicationId "com.eloyfranapps.daym"
  
          minSdkVersion 15
  
          targetSdkVersion 23
  
          versionCode 1
  
          versionName "1.0"
  
      }
  
      buildTypes {
  
          release {
  
              minifyEnabled false
  
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
  
          }
  
      }
  
  
  
      packagingOptions {
  
          exclude 'META-INF/maven/org.bytedeco.javacpp-presets/opencv/pom.properties'
  
          exclude 'META-INF/maven/org.bytedeco.javacpp-presets/opencv/pom.xml'
  
          exclude 'META-INF/maven/org.bytedeco.javacpp-presets/ffmpeg/pom.properties'
  
          exclude 'META-INF/maven/org.bytedeco.javacpp-presets/ffmpeg/pom.xml'
  
      }
  
  }
  
  
  
  configurations {
  
      all*.exclude group: 'org.bytedeco', module: 'javacpp-presets'
  
  }
  
  
  
  dependencies {
  
      compile fileTree(include: ['*.jar'], dir: 'libs')
  
      testCompile 'junit:junit:4.12'
  
      compile 'com.android.support:appcompat-v7:23.0.0'
  
      compile 'com.android.support:design:23.0.0'
  
      compile 'it.neokree:MaterialTabs:0.11'
  
      compile group: 'org.bytedeco', name: 'javacv', version: '1.2'
  
      compile group: 'org.bytedeco.javacpp-presets', name: 'opencv', version: '3.1.0-1.2', classifier: 'android-arm'
  
      compile group: 'org.bytedeco.javacpp-presets', name: 'opencv', version: '3.1.0-1.2', classifier: 'android-x86'
  
      compile group: 'org.bytedeco.javacpp-presets', name: 'ffmpeg', version: '3.0.2-1.2', classifier: 'android-arm'
  
      compile group: 'org.bytedeco.javacpp-presets', name: 'ffmpeg', version: '3.0.2-1.2', classifier: 'android-x86'
  
  }

  and the error is in the first line "new FFmpegFrameRecorder(outputPath, 1080, 1080) ;" of my code :

  FFmpegFrameRecorder recorder = new FFmpegFrameRecorder(outputPath, 1080, 1080);
  
  
  
              recorder.setVideoQuality(12.5);
  
              recorder.setVideoCodec(13);
  
              recorder.setFormat("mp4");
  
              recorder.setFrameRate(fps);
  
              recorder.start();
  
              AndroidFrameConverter an = new AndroidFrameConverter();
  
              for (int i = 0; i < charFrames.size(); i++) {
  
                  Frame frame = an.convert(charFrames.get(i));
  
                  recorder.record(frame);
  
              }
  
              recorder.stop();

• How do i simulate object-fit : fill with fluent-ffmpeg nodejs

  9 juillet 2023, par marvelMiles

  ffmpeg(input) .output(output) .outputOptions("-vf",scale=w=$1920:h=$1080) .outputOptions("-c:a", "copy") .on("end", () => { console.log("Video conversion completed"); }) .on("error", error => { console.error("Video conversion failed:", error); }) .on("progress", function(f) { console.log("...frames ", f.frames); }) .run()
code behave more like object-fit : contain than fill