Javacv: avcodec_open2() error -22 in javacv

[jananiarvind]

I am trying to save a video by capturing it from web camera.
I use windows 8.1 64 bit OS.
Eclipse luna and javacv, open cv and ffmpeg jars.

While executing the program I get following error:

Exception in thread "main" org.bytedeco.javacv.FrameRecorder$Exception: avcodec_open2() error -22: Could not open video codec.
at org.bytedeco.javacv.FFmpegFrameRecorder.startUnsafe(FFmpegFrameRecorder.java:529)
at org.bytedeco.javacv.FFmpegFrameRecorder.start(FFmpegFrameRecorder.java:288)
at CameraTest.main(CameraTest.java:34)

Please help me resolve this

[saudet]

Which device file and format are you trying to use?

[Ragghwendra]

Hey Saudet,

I am try to convert images to video using this code

FFmpegFrameRecorder recorder;
recorder = new FFmpegFrameRecorder(videoPath+"/" + this.FileName, 640, 480);
audioGrabber = new FFmpegFrameGrabber(this.audiopath); //At this line itself , I //get that error
imagesGrabber = new ArrayList<>();
for (int i = 0; i < myObjects.size(); i++) {
    imagesGrabber.add(new FFmpegFrameGrabber(myObjects.get(i)));
}
recorder.setFormat("mp4");
recorder.setFrameRate(audioGrabber.getFrameRate());
recorder.setSampleRate(audioGrabber.getSampleRate());
recorder.setVideoBitrate(AccessibilityEventCompat.TYPE_TOUCH_INTERACTION_START);
recorder.start(); // Error generate here <========================================== 
long startTime = System.currentTimeMillis();
Frame audioFrame = null;
audioGrabber.start();
for (int j = 0; j < imagesGrabber.size(); j++) {
    imagesGrabber.get(j).start();
    while ((audioFrame = audioGrabber.grabFrame()) != null || imagesGrabber.get(j).grabFrame() != null) {
        long ts = 3000 * (System.currentTimeMillis() - startTime);
        if (ts > recorder.getTimestamp()) {
            recorder.setTimestamp(ts);
            recorder.record(imagesGrabber.get(j).grabFrame());
            recorder.record(audioFrame);
        }
    }
    imagesGrabber.get(j).stop();
}
audioGrabber.stop();
recorder.stop();

Internaly in the FFmpegFrameRecorder.java line no 522

if((ret = avcodec.avcodec_open2(this.audio_c, this.audio_codec, var8)) < 0) {
    this.release();
    throw new Exception("avcodec_open2() error " + ret + ": Could not open audio codec.");
}

Error log
org.bytedeco.javacv.FrameRecorder$Exception: avcodec_open2() error -1: Could not open video codec.
at org.bytedeco.javacv.FFmpegFrameRecorder.startUnsafe(FFmpegFrameRecorder.java:495)
at org.bytedeco.javacv.FFmpegFrameRecorder.start(FFmpegFrameRecorder.java:268)
at com.myApp.TestActivity.makeVideo(TestActivity.java:424)
at com.myApp.TestActivity.access$300(TestActivity.java:55)
at com.myApp.TestActivity$CreateVideo.doInBackground(TestActivity.java:674)
at com.myApp.TestActivity$CreateVideo.doInBackground(TestActivity.java:638)
at android.os.AsyncTask$2.call(AsyncTask.java:292)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)

Please let me know the error

[saudet]

Check FFmpeg's log on the console for the error message.

[Ragghwendra]

Hey Saudet
I have check the error log and the error is here
avcodec_open2() error -1: Could not open video codec

I am refereeing the code of @NamrataBagerwal from this link
https://github.com/bytedeco/javacv/issues/33

[saudet]

Sorry, it looks like you are using Android. Please call FFmpegLogCallback.set() during init and check the Android log for more info about the error.

[Ragghwendra]

K I will try it