VideoView中的Android人像视频方向错误 [英] Android portrait video orientation wrong in VideoView

问题描述

我在这样的Android设备上以PORTRAIT方向捕获了一个新视频:

I capture a new video in PORTRAIT orientation on an Android device like this:

Intent intent = new Intent(android.provider.MediaStore.ACTION_VIDEO_CAPTURE); 
startActivityForResult(intent, 1886);

它给了我这个文件:"/mnt/sdcard/DCIM/Camera/video-2012-02-02-10-45-48.mp4"

and it gives me this file: "/mnt/sdcard/DCIM/Camera/video-2012-02-02-10-45-48.mp4"

然后我像这样玩:

private VideoView videoView = (VideoView) findViewById(R.id.videoView);
String videoUrl = "/mnt/sdcard/DCIM/Camera/video-2012-02-02-10-45-48.mp4";
videoView.setMediaController(new MediaController(this));      
videoView.setVideoURI(Uri.parse(videoUrl));
videoView.start();

这是我的布局文件:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >

<VideoView
    android:id="@+id/videoView"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_centerInParent="true" />

</RelativeLayout>

当我在标准的Android图库中播放时，方向是正确的.但是，当我在上方的VideoView中播放视频时，它已旋转了90度.景观效果很好，唯一的问题是肖像视频.

When I play it in the standard Android gallery, the orientation is correct. But when I play the video in the VideoView above, it's rotated 90 degrees. Landscape works great, the only problem are portrait videos.

如何在VideoView中旋转该视频?
另外，如何以编程方式确定方向?

How can I rotate this video in the VideoView?
Also, how can I programmatically determine the orientation?

推荐答案

您需要首先确定所捕获视频的方向.尽管有些版本使用人像，但大多数新的智能手机都使用横向相机.要确定方向，您可以获取框架的长度和宽度，然后进行比较.当您开始检查该活动是否为定向视频时，并取决于定向活动的变化.

You need to initially determine the orientation of the captured video. Most new smartphones use landscape orientation for the camera although there are versions which use portrait. To determine the orientation you can take the length and width of the frame then compare them. When you start to check whether that activity orientation video, and depending on the change of orientation activities.

代码示例:

public class MainActivity extends ActionBarActivity {

    String videoUrl = "/mnt/sdcard/DCIM/100ANDRO/MOV_9195.mp4";
    int videoWidth;
    int videoHeight;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getVideoAspectRatio();
        if (isVideoLandscaped()) {
            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
        }

        setContentView(R.layout.activity_main);
        VideoView videoView = (VideoView) findVewById(R.id.videoView);
        videoView.setMediaController(new MediaController(this));
        videoView.setVideoURI(Uri.parse(videoUrl));
        videoView.start();

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    private void getVideoAspectRatio() {
        MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
        mediaMetadataRetriever.setDataSource(this, Uri.parse(videoUrl));
        String height = mediaMetadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_HEIGHT);
        String width = mediaMetadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_WIDTH);
        videoWidth = Integer.parseInt(width);
        videoHeight = Integer.parseInt(height);
    }

    private boolean isVideoLandscaped() {
        if (videoWidth > videoHeight) {
            return true;
        } else return false;
    }
}

别忘了以样式或以编程方式将ActionBar隐藏在活动中.

Don't forget to hide the ActionBar in styles, or programmatically in activity.

这篇关于VideoView中的Android人像视频方向错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！