Android：使用“连续”录制视频自动对焦

发布于 2024-12-09 19:02:56 字数 628 浏览 0 评论 0原文

我从事视频录制工作；除了要求持续专注之外，一切正常。这就是我所做的（在surfaceCreated和surfaceChanged中都尝试过但没有成功）：

camera = Camera.open();
camera.setPreviewDisplay(holder);

Parameters parameters = camera.getParameters();

然后我做其中一个

parameters.setFocusMode(Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);

或

parameters.set("focus-mode", "continuous-video");

两个应该做同样的事情；然后我设置参数

camera.setParameters(parameters);

最后一行总是崩溃！那么我错过了什么吗？

顺便说一句，我在 Desire HD、Galaxy S、Galaxy Tab 7 和 10.1 等相当新的设备上进行了测试，这些设备必须支持连续自动对焦；至少他们的内置相机应用程序支持它。

原文

I work on video recording; everything works except for requesting continuous focus. This is what I do (tried both in surfaceCreated and surfaceChanged with no success):

camera = Camera.open();
camera.setPreviewDisplay(holder);

Parameters parameters = camera.getParameters();

then I do either

parameters.setFocusMode(Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);

parameters.set("focus-mode", "continuous-video");

both should do the same thing; then I set parameters with

camera.setParameters(parameters);

This last line always crashes! So do I miss something?

By the way, I test on rather new devices like Desire HD, Galaxy S, Galaxy Tab 7 and 10.1, which must have support for continuous auto-focus; at least their built-in camera apps support it.

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

段念尘 2024-12-16 19:02:56

您应该检查设备是否支持连续自动对焦。这对我有用，请尝试一下。

boolean startContinuousAutoFocus() {

    Camera.Parameters params = mCamera.getParameters();

    List<String> focusModes = params.getSupportedFocusModes();

    String CAF_PICTURE = Parameters.FOCUS_MODE_CONTINUOUS_PICTURE, 
           CAF_VIDEO = Parameters.FOCUS_MODE_CONTINUOUS_VIDEO, 
           supportedMode = focusModes
                   .contains(CAF_PICTURE) ? CAF_PICTURE : focusModes
                   .contains(CAF_VIDEO) ? CAF_VIDEO : "";

    if (!supportedMode.equals("")) {

        params.setFocusMode(supportedMode);
        mCamera.setParameters(params);
        return true;
    }

    return false;
}

You should check if Continuous Auto Focus is supported by the device. This is something that works for me, please give it a try.

boolean startContinuousAutoFocus() {

    Camera.Parameters params = mCamera.getParameters();

    List<String> focusModes = params.getSupportedFocusModes();

    String CAF_PICTURE = Parameters.FOCUS_MODE_CONTINUOUS_PICTURE, 
           CAF_VIDEO = Parameters.FOCUS_MODE_CONTINUOUS_VIDEO, 
           supportedMode = focusModes
                   .contains(CAF_PICTURE) ? CAF_PICTURE : focusModes
                   .contains(CAF_VIDEO) ? CAF_VIDEO : "";

    if (!supportedMode.equals("")) {

        params.setFocusMode(supportedMode);
        mCamera.setParameters(params);
        return true;
    }

    return false;
}

回复收藏 0 原文