avformat_open_input() error -2: Could not open input "java.io.BufferedInputStream@49829e35". (Has setFormat() been called?)

[KtfwyCJ]

hello:

i'm use FFmpegFrameGrabber to get video metadata，then it return error infomation.The following is my code:

MetadataDto metadataDto = new MetadataDto();
    log.info("start get video mata");
    FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(stream);
    grabber.start();
    int length = grabber.getLengthInFrames();
    int lengthInVideo = grabber.getLengthInVideoFrames();
    int i = 0;
    Frame frame = null;
    while (i < length) {
      frame = grabber.grabFrame();
      if ((i > FRAME_NUM) && (frame.image != null)) {
        break;
      }
      i++;
    }
    Java2DFrameConverter converter = new Java2DFrameConverter();
    BufferedImage bi = converter.getBufferedImage(frame);
    long duration = grabber.getLengthInTime() / (1000 * 1000);

    grabber.stop();

[saudet]

Look at the message displayed on the console for more information.

[saudet]

If you don't see any messages on the console, make sure that FFmpegLogCallback.set() has been called.

[mrasyidg]

Hello @saudet, I got the same error as @KtfwyCJ and I have also put on the FFmpegLogCallback.set() and here is what it says from the console:

op_kernel.cc:1401 OP_REQUIRES failed at strided_slice_op.cc:106 : Invalid argument: slice index 0 of dimension 1 out of bounds.

The original error message was alike with @KtfwyCJ's:

ERROR OCCURED : org.bytedeco.javacv.FrameGrabber$Exception: avformat_open_input() error -2: Could not open input "java.io.BufferedInputStream@e90ad7b". (Has setFormat() been called?)

---

The code (ignore the Logs):

` fun javacvConvertLite(filename: File, cropSize: Crop): ArrayList<FloatArray> {

      val converterToMat = ToMat()
      var bmp: Bitmap? = null
      val outputData: ArrayList<FloatArray> = ArrayList<FloatArray>()

      try {
          val filePath = Environment.getExternalStorageDirectory()
          dir = File(filePath.absolutePath + "/SIBI/")
          Log.d("dir_o", dir.toString())
          frameDir = File(filePath.absolutePath + "/SIBI/Frames")
          var inputStream: InputStream? = FileInputStream(filename)

          val grabber = FFmpegFrameGrabber(inputStream)

          hsv = Mat()
          Log.d("cidx", "hsv")
          skinMask = Mat()
          Log.d("cidx", "skinMask")

          grabber.startUnsafe()
          Log.d("cidx", "start")
          var idx = 1

          while (true) {
              Log.d("cidx", idx.toString())

              val nthFrame = grabber.grabImage() ?: break
              grabber.grabImage() ?: break

              var mat = converterToMat.convertToOrgOpenCvCoreMat(nthFrame)

              mat = trial4PreprocessImageGetSkin(mat, cropSize, idx++)

              bmp = Bitmap.createBitmap(mat.cols(), mat.rows(), Bitmap.Config.ARGB_8888);
              Utils.matToBitmap(mat, bmp)

              var mobnet = mobileNetV2Classifier.recognize(bmp)[0]
              Log.d("mobnet", mobnet.size.toString())
              Log.d("mobnet", mobnet.toString())
              outputData.add(mobnet)

              /* Clean Components */
              bmp.recycle()
              bmp = null
              mat.release()

          }

          grabber.stop()
          grabber.release()
      } catch (e: Exception) {
          println("ERROR OCCURED : $e")
      }

      return outputData
  }`

What the code does: It tries to convert an mp4 file input into a FloatArray, with ffmpg (15 FPS).

---

Do you know what's the problem/what to fix? @saudet

Thanks!

[saudet]

The mp4 format doesn't support streams very well. Please try with a file instead.

[DesenYang]

I try to grab a srt format stream ,bu it crash  with error :

E/linker: normalize_path - invalid input: "lib/", the input path should be absolute W/linker: Warning: unable to normalize "lib/" (ignoring) E/linker: normalize_path - invalid input: "lib/", the input path should be absolute W/linker: Warning: unable to normalize "lib/" (ignoring) E/linker: normalize_path - invalid input: "lib/", the input path should be absolute W/linker: Warning: unable to normalize "lib/" (ignoring) E/linker: normalize_path - invalid input: "lib/", the input path should be absolute W/linker: Warning: unable to normalize "lib/" (ignoring) I/System.out: exception: org.bytedeco.javacv.FFmpegFrameGrabber$Exception: avformat_open_input() error -1330794744: Could not open input "srt://192.168.2.100:8080?streamid=live.sls.com/live/test". (Has setFormat() been called?) (For more details, make sure FFmpegLogCallback.set() has been called.) end I/AwareBitmapCacher: init lrucache size: 2097152 pid=18497

My code is like this . (SOURCE_RTSP just work fine , but SOURCE_SRT kill me ) : final String SOURCE_RTSP = "rtmp://192.168.2.100/live/room"; final String SOURCE_SRT = "srt://192.168.2.100:8080?streamid=live.sls.com/live/test";

final int TIMEOUT = 10; // In seconds.
public void rtspStreamingTest() {
    try {
        FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(SOURCE_SRT);

        grabber.setOption(
                TimeoutOption.STIMEOUT.getKey(),
                String.valueOf(TIMEOUT * 1000000)
        );
        grabber.start();
        Frame frame = null;
        while ((frame = grabber.grab()) != null) {
            System.out.println("frame grabbed at " + grabber.getTimestamp());
        }
        System.out.println("loop end with frame: " + frame);
    } catch (FrameGrabber.Exception ex) {
        System.out.println("exception: " + ex);
    }
    System.out.println("end");
}

[DesenYang]

after i put FFmpegLogCallback.set(); before FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(SOURCE_SRT);

same error

[saudet]

Please try again with JavaCV 1.5.6-SNAPSHOT: http://bytedeco.org/builds/

[mrasyidg]

The mp4 format doesn't support streams very well. Please try with a file instead.

Ah yeah, I'm sorry for the late response, but you were right 😊

Works fine so far, after I changed the videos to the working/compatible ones.

Thanks! @saudet

[HuangDayu]

Hello, how to solve this problem? My video stream input object is also java.io.BufferedInputStream, and the same error occurs. @saudet @KtfwyCJ @mrasyidg

[saudet]

@HuangDayu Not all formats support streams well. Please try another format.