启动 FFmpegFrameGrabber 中的 java.lang.UnsatisfiedLinkError : org. bytedeco.javacpp.avutil

Question

我在 Android 中创建了慢动作视频应用程序，我可以尝试在总视频长度中的任何开始和结束位置设置视频运动速度。

但是启动FFmpegFrameGrabber时出现一些错误。

这是我的代码:

private class PrepareMedia extends AsyncTask<Void, Void, Void> {
    private PrepareMedia() {
    }

    protected Void doInBackground(Void... params) {
        FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(viewSource);
        try {
            grabber.start();
            grabber.stop();
            grabber.release();
        } catch (Exception e) {
            Log.e(TAG, "doInBackground: ");
        }
        return null;
    }
}

查看我的错误。

01-12 15:59:16.374 14990-14990/com.example.slowmotiondemo E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.slowmotiondemo, PID: 14990
    java.lang.UnsatisfiedLinkError: org.bytedeco.javacpp.avutil
        at java.lang.Class.classForName(Native Method)
        at java.lang.Class.forName(Class.java:324)
        at org.bytedeco.javacpp.Loader.load(Loader.java:585)
        at org.bytedeco.javacpp.Loader.load(Loader.java:530)
        at org.bytedeco.javacpp.avformat$AVFormatContext.<clinit>(avformat.java:2819)
        at org.bytedeco.javacv.FFmpegFrameGrabber.startUnsafe(FFmpegFrameGrabber.java:468)
        at org.bytedeco.javacv.FFmpegFrameGrabber.start(FFmpegFrameGrabber.java:462)
        at com.example.slowmotiondemo.ActivityCutMergeVideo.prepareMediaForOreantation(ActivityCutMergeVideo.java:687)
        at com.example.slowmotiondemo.ActivityCutMergeVideo.onCreate(ActivityCutMergeVideo.java:507)
        at android.app.Activity.performCreate(Activity.java:6904)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1136)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3266)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3415)
        at android.app.ActivityThread.access$1100(ActivityThread.java:229)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1821)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:148)
        at android.app.ActivityThread.main(ActivityThread.java:7331)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)

请告诉我如何解决错误。

Answer 1

首先尝试手动安装 javacv ( https://github.com/bytedeco/javacv#manual-installation )。

然后尝试从jar中提取.so文件并将其放入app/src/main/jniLibs中。

如果这也不起作用，请使用本手册: https://github.com/bytedeco/javacpp-presets/wiki/The-UnsatisfiedLinkError-X-File-%28a-real-experience%29