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• Android crashes when new FFmpegFrameRecorder()

  23 mai 2021, par James Yu

  I try to create rtsp stream (or video file) with bitmaps using FFmpegFrameRecorder, and I get this message in logcat at the very beginning of the process :

  


  Thread[6,tid=2010,WaitingInMainSignalCatcherLoop,Thread*=0x795a268000,peer=0x12ec00b8,"Signal Catcher"]: reacting to signal 3


  


  and get

  


  SIGILL (signal SIGILL: illegal instruction)


  


  in debug tag, then my app hangs after these message shows up.
It is confirmed this SIGILL pops when new FFmpegFrameRecorder() is invoked, I wonder why it complains illegal instruction ?

  


  This is how I create an instance of FFmpegFrameRecorder :

  


      private void startRecorder() {
        if(recorder != null) { return; }
        recorder = new FFmpegFrameRecorder("/sdcard/test.flv", 640, 480, 0);
        recorder.setVideoCodec(avcodec.AV_CODEC_ID_H264);
        recorder.setFormat("flv");
        recorder.setFrameRate(25);
        recorder.setInterleaved(true);
        recorder.setVideoOption("crf", Integer.toString(25));
        recorder.setPixelFormat(0);
        recorder.setGopSize(-1);
        recorder.setVideoOption("tune", "zerolatency");
        recorder.setVideoOption("preset", "ultrafast");
        try {
            recorder.start();
        } catch (FFmpegFrameRecorder.Exception e) {
            Log.e("sensetime", e.getMessage(), e);
        }
    }


  


  Environment information is as follows :

  


  Hardware: Qualcomm SDM660
Android: 10


  


  Dependencies in build.gradle :

  


  implementation group: 'org.bytedeco', name: 'javacv', version: '1.5.5'
implementation group: 'org.bytedeco', name: 'javacpp', version: '1.5.5'
implementation group: 'org.bytedeco', name: 'javacpp', version: '1.5.5', classifier: 'android-arm64'
implementation group: 'org.bytedeco', name: 'javacpp', version: '1.5.5', classifier: 'android-arm'
implementation group: 'org.bytedeco', name: 'ffmpeg', version: '4.3.2-1.5.5'
implementation group: 'org.bytedeco', name: 'ffmpeg', version: '4.3.2-1.5.5', classifier: 'android-arm64'
implementation group: 'org.bytedeco', name: 'ffmpeg', version: '4.3.2-1.5.5', classifier: 'android-arm'


  


  packagingOptions in build.gradle :

  


  packagingOptions {
    pickFirst 'META-INF/native-image/android-arm64/jnijavacpp/jni-config.json'
    pickFirst 'META-INF/native-image/android-arm64/jnijavacpp/reflect-config.json'
    pickFirst 'META-INF/native-image/android-arm/jnijavacpp/reflect-config.json'
    pickFirst 'META-INF/native-image/android-arm/jnijavacpp/jni-config.json'
}


  


• ogg/vorbis : implement header packet skip in chained ogg bitstreams.

  24 mai, par Romain Beauxis

  ogg/vorbis : implement header packet skip in chained ogg bitstreams.
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/vorbis_parser.h
  • [DH] libavcodec/vorbisdec.c
  • [DH] libavformat/oggparsevorbis.c
  • [DH] tests/ref/fate/ogg-vorbis-chained-meta.txt

• Which library lets me manipulate Audio Objetc's metadata right before decoding ?

  23 juin 2024, par BunnyMerz

  I have read that in the MPEG-H part 3, the 3D audio one, you have the option to encode Objects with certain meta-data, such as volume and coordinates. And it is defined by the Standard that you can alter those information as it goes trough the decoder. Here is an image taken from and article. I'm referring to the box called Meta-data Decoder

  


  

  


  I am struggling to find a library that gives me that option, programmatically. I have looked into libmpegh and ffmpeg (which is also tagged in this question). Are there any known Libs that will let me alter the metadata as the audio is being decoded ?