将视频裁剪到像vine和instagram这样的正方形

Question

我需要在诸如Instagram或Whatsapp的android应用中裁剪视频。我搜索了很多，但没有发现太多东西。除了ffmpeg之外，是否还有其他裁剪库...它适用于风景视频...但也需要同时用于风景和potrait。.enter code here

    MediaMetadataRetriever retriever = new MediaMetadataRetriever();
    retriever.setDataSource(inputPath);
    String width = retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_WIDTH);
    String height = retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_HEIGHT);
    String bitrate = retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_BITRATE);
    rotation = Integer.parseInt(retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_ROTATION));
enter code here
    Log.e(TAG, "handleCropStart:------------widht--->" + width + "\nheight---->" + height + `"\nresolution----->" + bitrate + "\nrotation ----->" + rotation);

    playVideo();
    crop_bt.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            gotoVideoStickers(inputPath);

        }
    });
}

public void playVideo() {
    MediaController mediaController = new MediaController(this);
    mediaController.setAnchorView(video_vv);

    Uri uri = Uri.parse(inputPath);

    video_vv.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
        @Override
        public void onPrepared(MediaPlayer mp) {
            if (crop) {
                ViewGroup.LayoutParams layoutParams = video_vv.getLayoutParams();
                int videoWidth = mp.getVideoWidth();
                int videoHeight = mp.getVideoHeight();
                Log.e(TAG, "onPrepared: "+videoWidth+"-"+videoHeight );
                if (rotation >= 90) {
                    Log.e(TAG, "onPrepared: if" );
                    layoutParams.height = 1280;
                    layoutParams.width = 1280;
                } else {
                    Log.e(TAG, "onPrepared: else" );
                    layoutParams.width = 1280;
                    layoutParams.height = 600;
                }
                video_vv.setLayoutParams(layoutParams);
            } else {
                int videoWidth = mp.getVideoWidth();
                int videoHeight = mp.getVideoHeight();

                ViewGroup.LayoutParams layoutParams = video_vv.getLayoutParams();
                layoutParams.width = videoWidth;
                layoutParams.height = 600;

                video_vv.setLayoutParams(layoutParams);
            }
        }
    });
    video_vv.setMediaController(mediaController);
    video_vv.setVideoURI(uri);
    video_vv.requestFocus();
    video_vv.start();
}

@Override
public void onClick(View v) {
    switch (v.getId()) {
        case R.id.crop_v_bt:
            crop = true;
            playVideo();
            break;
        case R.id.original_bt:
            crop = false;
            playVideo();
            break;
    }
}

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