如何为从库中选择的视频设置持续时间限制

Question

我正在尝试限制将上传到服务器的视频的持续时间。

我使用此代码让用户从图库中选择一个视频：

Intent intent = new Intent();
intent.setAction(Intent.ACTION_PICK);
intent.setType("video/*");
List<ResolveInfo> list = getPackageManager().queryIntentActivities(
intent, PackageManager.MATCH_DEFAULT_ONLY);
if (list.size() <= 0) {
Log.d(TAG, "no video picker intent on this hardware");
return;
}
startActivityForResult(intent, GALLERY_RETURN);

如何为从图库中选择的视频设置 1 分钟的时长限制？

Answer 1

Intent intent = new Intent();
intent.setAction(Intent.ACTION_PICK);
intent.setType("video/*");
List<ResolveInfo> list = getPackageManager().queryIntentActivities(
intent, PackageManager.MATCH_DEFAULT_ONLY);
if (list.size() <= 0) {
Log.d(TAG, "no video picker intent on this hardware");
return;
}
long maxVideoSize = 24 * 1024 * 1024; // 10 MB
intent.putExtra(MediaStore.EXTRA_SIZE_LIMIT, maxVideoSize);

startActivityForResult(intent, GALLERY_RETURN);

Answer 2

mediaRecorder = new MediaRecorder();

    mediaRecorder.setCamera(myCamera);

    mediaRecorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
    mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
    try {
        mediaRecorder.setProfile(CamcorderProfile
                .get(CamcorderProfile.QUALITY_480P));
    } catch (Exception e) {
        mediaRecorder.setProfile(CamcorderProfile
                .get(CamcorderProfile.QUALITY_LOW));
    }

    mediaRecorder
            .setOutputFile(Environment
                    .getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES)
                    + "/"
                    + Config.IMAGE_DIRECTORY_NAME
                    + "/TempVideo.mp4");
    mediaRecorder.setMaxDuration(60000); // Set max duration 30 sec max of
                                            // twitter.
    // mediaRecorder.setMaxFileSize(14340032); // Set max file size ~ 7M

    mediaRecorder.setPreviewDisplay(myCameraSurfaceView.getHolder()
            .getSurface());
    mediaRecorder.setOrientationHint(90);
    mediaRecorder.setOnInfoListener(new MediaRecorder.OnInfoListener() {
        public void onInfo(MediaRecorder mr, int what, int extra) {
            if ((what == MediaRecorder.MEDIA_RECORDER_INFO_MAX_DURATION_REACHED)
                    || (what == MediaRecorder.MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED)) {
                updateView();
            }
        }
    });