Java 根据所使用的摄像机，使用mp4parser旋转视频

基本上，我想旋转视频，这取决于使用哪个摄像头拍摄

前摄像头以90度镜像，而后摄像头显示正确。目前，它将根据第一个剪辑设置矩阵。如果第一个剪辑是用前置摄像头制作的，它会将所有剪辑旋转270度，反之亦然

下面是一个示例代码（

rotations

是一个包含剪辑旋转的ArrayList）：

---

实际上，您可以使用这些代码旋转视频，无需使用mp4解析器库，非常复杂

/**
 *
 * @param mMediaRecorder
 * @return
 */
public static MediaRecorder rotateBackVideo(MediaRecorder mMediaRecorder) {
    /**
     * Define Orientation of video in here,
     * if in portrait mode, use value = 90,
     * if in landscape mode, use value = 0
     */
    switch (CustomCamera.current_orientation) {
        case 0:
            mMediaRecorder.setOrientationHint(90);
            break;
        case 90:
            mMediaRecorder.setOrientationHint(180);
            break;
        case 180:
            mMediaRecorder.setOrientationHint(270);
            break;
        case 270:
            mMediaRecorder.setOrientationHint(0);
            break;
    }

    return mMediaRecorder;
}

/**
 *
 * @param mMediaRecorder
 * @return
 */
public static MediaRecorder rotateFrontVideo(MediaRecorder mMediaRecorder) {
    /**
     * Define Orientation of video in here,
     * if in portrait mode, use value = 90,
     * if in landscape mode, use value = 0
     */
    switch (CustomCamera.current_orientation) {
        case 0:
            mMediaRecorder.setOrientationHint(270);
            break;
        case 90:
            mMediaRecorder.setOrientationHint(180);
            break;
        case 180:
            mMediaRecorder.setOrientationHint(90);
            break;
        case 270:
            mMediaRecorder.setOrientationHint(0);
            break;
    }

    return mMediaRecorder;
}

---

嗨，托尔斯滕，让我面对同样的问题。你解决了入职问题了吗？如果您解决了问题，请提供帮助me@MuraliGanesan很抱歉，我很久没有处理这个项目了。我最后使用了Instagram的策略，在你用后/前摄像头录制了一个视频片段后，你可以禁用切换摄像头。旋转照片与旋转视频有什么关系？这篇文章可以通过先阅读问题，然后只回答问题来改进。旋转照片与修改视频完全无关。

/**
 *
 * @param mMediaRecorder
 * @return
 */
public static MediaRecorder rotateBackVideo(MediaRecorder mMediaRecorder) {
    /**
     * Define Orientation of video in here,
     * if in portrait mode, use value = 90,
     * if in landscape mode, use value = 0
     */
    switch (CustomCamera.current_orientation) {
        case 0:
            mMediaRecorder.setOrientationHint(90);
            break;
        case 90:
            mMediaRecorder.setOrientationHint(180);
            break;
        case 180:
            mMediaRecorder.setOrientationHint(270);
            break;
        case 270:
            mMediaRecorder.setOrientationHint(0);
            break;
    }

    return mMediaRecorder;
}

/**
 *
 * @param mMediaRecorder
 * @return
 */
public static MediaRecorder rotateFrontVideo(MediaRecorder mMediaRecorder) {
    /**
     * Define Orientation of video in here,
     * if in portrait mode, use value = 90,
     * if in landscape mode, use value = 0
     */
    switch (CustomCamera.current_orientation) {
        case 0:
            mMediaRecorder.setOrientationHint(270);
            break;
        case 90:
            mMediaRecorder.setOrientationHint(180);
            break;
        case 180:
            mMediaRecorder.setOrientationHint(90);
            break;
        case 270:
            mMediaRecorder.setOrientationHint(0);
            break;
    }

    return mMediaRecorder;
}