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• Fatal Exception : java.lang.UnsatisfiedLinkError lopen failed : library name "/data/packagename/lib/arm64/libmobileffmpeg_abidetect.so" too long

  23 septembre 2020, par Android198

  Fatal Exception: java.lang.UnsatisfiedLinkError lopen failed: library name "/data/packagename/lib/arm64/libmobileffmpeg_abidetect.so" too long 


  


  I got this error in android 5 devices because my app packagename is too long. i build apk with abi filters armeabi-v7a, arm64-v8a

  


   &#x27;java.lang.System.loadLibrary (System.java:989)&#xA;    com.arthenica.mobileffmpeg.AbiDetect.<clinit> (AbiDetect.java)&#xA;    com.arthenica.mobileffmpeg.AbiDetect.getNativeAbi (AbiDetect.java)&#xA;    com.arthenica.mobileffmpeg.AbiDetect.setArmV7aNeonLoaded (AbiDetect.java)&#xA;    com.arthenica.mobileffmpeg.Config.enableLogCallback (Config.java:5)&#x27;&#xA;</clinit>

  


• electron app fluent-ffmpeg " Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height"

  27 juillet 2020, par Martin

  I am trying to run an ffmpeg command in my electron app. I have created the function ffmpegTest() based off instructions for setting up ffmpeg here :

  


  https://alexandercleasby.dev/blog/use-ffmpeg-electron

  


  and the example query for ffmpeg-fluent here :

  


  https://github.com/fluent-ffmpeg/node-fluent-ffmpeg/blob/master/examples/image2video.js

  


  function ffmpegTest(){
    console.log('ffmpeg-test')
    //require the ffmpeg package so we can use ffmpeg using JS
    const ffmpeg = require('fluent-ffmpeg');
    //Get the paths to the packaged versions of the binaries we want to use
    const ffmpegPath = require('ffmpeg-static').replace(
        'app.asar',
        'app.asar.unpacked'
    );
    const ffprobePath = require('ffprobe-static').path.replace(
        'app.asar',
        'app.asar.unpacked'
    );
    //tell the ffmpeg package where it can find the needed binaries.
    ffmpeg.setFfmpegPath(ffmpegPath);
    ffmpeg.setFfprobePath(ffprobePath);
    
    var imgPath = "C:\\Users\\marti\\Documents\\martinradio\\uploads\\israel song festival 1979\\front.jpg"
    var outputPath = "C:\\Users\\marti\\Documents\\martinradio\\uploads\\israel song festival 1979\\output.m4v"

    // make sure you set the correct path to your video file
    var proc = ffmpeg(imgPath)
    // loop for 5 seconds
    .loop(5)
    // using 25 fps
    .fps(25)
    // setup event handlers
    .on('end', function() {
    console.log('file has been converted succesfully');
    })
    .on('error', function(err) {
    console.log('an error happened: ' + err.message);
    })
    // save to file
    .save(outputPath);

    console.log("end of ffmpeg-test")
}


  


  it is trying to convert an image to a video, my filepaths are accurate, but when I run this function, I get this output in console :

  


  ffmpeg-test
index.js:137 end of ffmpeg-test
index.js:132 an error happened: ffmpeg exited with code 1: Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
Conversion failed!


  


  After the error prints out, I can see my output.m4v file inside my output folder, but it is 0KB in size and wont open. Is there some way I can specify my bit_rate / rate / width / height in my fluent-ffmpeg command so I can run this simple ffmpeg command ?

  


  thanks

  


• Error of FFmpeg on Java in "av_image_copy_to_buffer" method during decoding H.264 stream

  26 mai 2020, par maru2213

  I'm trying to decode H.264 stream, which is sent over Socket from an Android application to a computer. And I also want to show the decoded stream using JavaFX. I searched for a long time, and decided to use JavaCV / FFmpeg. However I got error from FFmpeg. (I was inspired by this code.)

  



  Questions :

  



  

  • Why does FFmpeg make error ?

  


  • Is it a correct way to convert AVFrame to javafx.scene.image.Image ?

  


  



  I'm using :

  



  

  • javacv-platform 1.4.4

  


  • ffmpeg-platform 4.1-1.4.4

  


  



  Code :

  



  This is a part of import and class fields, and method which runs once at the first time. (Actually the content of initialize() is wrapped by try catch.)

  



      import javafx.scene.image.Image;

    private avcodec.AVCodec avCodec;
    private avcodec.AVCodecContext avCodecContext;
    private avutil.AVDictionary avDictionary;
    private avutil.AVFrame avFrame;

    public void initialize() {
        avCodec = avcodec_find_decoder(AV_CODEC_ID_H264);
        if (avCodec == null) {
            throw new RuntimeException("Can't find decoder");
        }
        avCodecContext = avcodec_alloc_context3(avCodec);
        if (avCodecContext == null) {
            throw new RuntimeException("Can't allocate decoder context");
        }
        int result = avcodec_open2(avCodecContext, avCodec, (AVDictionary) null);
        if (result < 0) {
            throw new RuntimeException("Can't open decoder");
        }
        avFrame = av_frame_alloc();
        if (avFrame == null) {
            throw new RuntimeException("Can't allocate frame");
        }
    }


  



  And this is a method which is called every time when I receive a packet from Android. byte[] data is the packet data starting with 0x00, 0x00, 0x00, 0x01.

  



  The place where I get error is number_of_written_bytes. It always gets <0.

  &#xA;&#xA;

      private void decode(byte[] data) {
        AVPacket avPacket = new AVPacket();
        av_init_packet(avPacket);
        avPacket.pts(AV_NOPTS_VALUE);
        avPacket.dts(AV_NOPTS_VALUE);
        BytePointer bytePointer = new BytePointer(data);
        bytePointer.capacity(data.length);
        avPacket.data(bytePointer);
        avPacket.size(data.length);
        avPacket.pos(-1);

        avcodec_send_packet(avCodecContext, avPacket);
        int result = avcodec_receive_frame(avCodecContext, avFrame);
        if (result >= 0) {
            int bufferOutputSize = av_image_get_buffer_size(avFrame.format(), avFrame.width(), avFrame.height(), 16);
            Pointer pointer = av_malloc(bufferOutputSize);
            BytePointer outputPointer = new BytePointer(pointer);
            int number_of_written_bytes = av_image_copy_to_buffer(outputPointer, bufferOutputSize, avFrame.data(), avFrame.linesize(), avFrame.chroma_location(), avFrame.width(), avFrame.height(), 1);
            if (number_of_written_bytes < 0) {
                //The process always come here.
                throw new RuntimeException("Can't copy image to buffer");
            }

            System.out.println("decode success");
            Image image = new Image(new ByteArrayInputStream(outputPointer.asBuffer().array()));
        } else {
            System.out.println("decode failed");
        }
    }


  &#xA;&#xA;

  Anything is helpful for me. Thanks.

  &#xA;