有时，Apple 的FaceTime缺少体验中最重要的“面部”部分。如果您正在尝试与某人聊天，但您所看到的只是黑屏，您可以检查一些事情来修复它。
以下提示涵盖 iOS、iPadOS 和 macOS。我们将指出修复何时仅适用于这些操作系统之一。
检查 Apple 的服务器状态
Apple 维护一个方便的页面(handy page)，您可以在其中检查是否有任何Apple服务遇到问题。值得快速检查该页面，以确保您不会遇到无法控制的事情。
即使您在官方页面上没有看到任何问题，也值得快速搜索社交媒体以查找有关FaceTime服务问题的提及，以防万一尚未向Apple报告。
如果看起来你不是唯一一个有问题的人，最好等一会儿，看看问题是否由Apple解决。
更新您的操作系统
无论您使用的是 iOS、iPadOS 还是 macOS，FaceTime都是系统不可或缺的一部分。虽然一般来说不应该存在兼容性问题，但最好每个参与者都将他们的操作系统更新到最新版本，在撰写本文时是 iOS 15 和 macOS 12 Monterey。
(Did Someone Forget Their Privacy Blocker)有人在相机镜头上(Lens)忘记了他们的隐私拦截器吗？
在网络摄像头镜头上放置特殊的网络摄像头隐私屏幕以防止黑客进行间谍活动已变得流行（并且明智）。在您开始探索设置并尝试各种技术修复之前，请检查您或线路另一端的人是否没有将他们的设备留在MacBook或 iOS 设备上，从而以物理方式阻止FaceTime视频。
重置您的互联网(Internet)或尝试不同的连接
在某些情况下，当FaceTime(FaceTime)出现黑屏时，您的互联网连接可能是罪魁祸首。视频(Video)流量可能由于某种原因被阻塞，或者连接质量太差以至于无法进行视频传输。
虽然您的FaceTime黑屏问题背后不太可能是互联网连接问题，但这是最容易检查的事情之一。关闭您的路由器或其他互联网网关设备，等待几分钟，然后重新打开。或者，您可以尝试使用其他不相关的连接，例如您的手机热点而不是Wi-Fi。如果在使用不同的 Internet 连接进行测试时黑屏问题仍然存在，则可能不是连接的问题。
如果您使用防火墙，则需要确保某些网络端口已打开，FaceTime才能正常工作：
- 80 (TCP)
- 443 (TCP)
- 3478 到 3497 (UDP)
- 5223 (TCP)
- 16384 到 16387 (UDP)
- 16393 到 16402 (UDP)
如果您不知道如何在防火墙上打开被阻止的端口，请查阅防火墙的帮助文档，询问学校或工作中的系统管理员，或者查看我们的关于查找开放端口(finding open ports)和端口转发(port forwarding)的指南。
关闭其他可能(Might Be)正在使用相机的
应用(Apps)程序
一次只能有一个应用程序使用网络摄像头。有时，完成后，应用程序可能不会对相机背面提出要求。因此，有必要关闭其他使用网络摄像头的应用程序，例如Skype或Microsoft Teams，以确保安全。
重新启动您的设备
如果关闭可能占用相机的应用程序没有帮助，一个很好的通用策略是重新启动整个设备。无论您是在Mac、iPad 还是 iPhone 上，重新启动一切都可以帮助清除妨碍相机正常工作或FaceTime无法正确使用它的小错误。
旋转手机
这似乎是一个奇怪的解决方案，但在 iPhone 或 iPad 上，您可以尝试在横向和纵向之间旋转设备，以消除黑屏。如果您在物理旋转手机时屏幕方向没有改变，请从屏幕右上角向下滑动并在控制中心切换方向锁定，如此处所示。
如果幸运的话，在两个方向之间旋转将恢复视频。
断开连接并重新连接
各方之间的不良联系可能是黑色视频馈送背后的原因。最简单的答案是挂断并再次呼叫。您的设备与其他人的设备之间可能存在许多问题，包括互联网数据路由问题或 Apple 服务器问题。
意外是纯音频通话吗？
FaceTime允许您进行纯音频通话而不是视频通话以节省带宽，或者如果您还没有准备好让任何人看到您的脸。如果您目前正忙于纯音频通话，您将
在空白视频屏幕的中间看到一个按钮，用于启动FaceTime通话。(FaceTime)
您是否选择了合适的网络摄像头(Right Webcam Selected)？
如果您的Mac(Mac)连接了多个网络摄像头，则可能是当前选择了错误的网络摄像头。这通常不会显示黑屏，但如果该相机有隐私保护器或无法正常工作，您可能什么也看不到。
在FaceTime中，从菜单栏中打开“视频(Video)”选项，然后检查那里是否列出了任何摄像头。
如果您看到多个摄像头，请选择内置摄像头。您也可以简单地断开外部摄像头，如果 Mac 有内置摄像头，FaceTime应该默认使用它。
某些类型的软件可能会安装“虚拟”网络摄像头，因此即使您的计算机中没有插入另一个网络摄像头，也可以选择其中一个虚拟网络摄像头。
在(Between)前置摄像头(Front Camera)和后置摄像(Rear Cameras)头之间切换
似乎适用于许多 iPad 或 iPhone 用户的一个技巧是在前后摄像头之间切换。我们认为这可能会通过强制相机重新初始化来实现，但无论秘密如何，这都是一个很容易尝试的修复方法，而且对于很多面对黑色FaceTime屏幕的人来说似乎可以解决问题。
强制退出应用程序
如果其他方法都
不起作用，则值得对FaceTime应用程序本身进行硬重置。(FaceTime)
- 在 iOS 或 iPadOS 设备上，从屏幕底部向上滑动，直到看到应用轮播。然后向左或向右滚动，直到看到 FaceTime。
- 向上滑动(Swipe)应用程序并从屏幕顶部滑出，然后再次打开它。
在 Mac 上：
- Press Command + Space Bar，然后搜索Activity Monitor并打开它。
- 在列表中查找FaceTime进程并单击它以突出显示它。
- 现在选择停止按钮。
- 当询问您是否确定时，选择Force Quit。
再次打开FaceTime，看看一切是否恢复正常。
退出您的 Apple ID
这是另一个没有明确解释为什么会起作用的技巧，但很明显，它确实对某些人有用，而且尝试起来又快又容易。
在您的 iPhone 上：
- 打开设置应用程序。
- 选择您的姓名。
- 向下滚动(Scroll)到Sign Out，选择它并完成该过程。
退出后，再次登录您的帐户并尝试FaceTime以查看错误是否已解决。
在 Mac 上：
- 选择屏幕左上角
的Apple按钮。(Apple)
- 选择系统偏好设置。
- 选择 Apple ID。
- 选择概览。
- 选择退出。
与 iOS 一样，再次登录，然后再次尝试FaceTime。
使用不同的应用程序
不幸的是，我们现在已经到了可供选择的数量变得稀少的地步。所以是时候尝试一些不是FaceTime的东西了。这也意味着您可以与Android朋友交谈，假设您有的话。
Apple Store上有许多很棒的替代品，包括WhatsApp、Zoom和Telegram，它们都有 iOS 应用程序。如果您现在必须与某人通话并稍后进行故障排除，这不仅是一个快速解决方案，而且它也是一个诊断步骤，因为如果您在替代应用程序中也遇到黑屏而不是视频，它指向特别是在FaceTime之外的问题。
不得已：恢复出厂设置
在用尽所有其他实际修复后，最后的手段是恢复出厂设置。这是解决问题的一种大锤方法，但我们已经看到它的工作原理与解决有时出现在 iOS 系列设备上的恼人的不正确网络密码错误一样。
请注意，无法保证恢复出厂设置可以解决问题。例如，如果问题出在更新或 Apple 的服务器上，则恢复出厂设置是无关紧要的。您可以使用我们的iOS或macOS出厂重置指南获取确切说明。
由于恢复出厂设置非常耗时，如果出现问题，您甚至可能会丢失个人数据，因此我们强烈建议您考虑解决FaceTime黑屏问题是否值得冒险。您可能需要先联系Apple 支持(Apple Support)，并且不要忘记备份您的数据。
How to Fix FaceTime Black Screen Issues (iPhone, iPad, and Mac)
Sometimes, Apple’s FaceTime is miѕsing the all-important “face” part of the experience. If you’re trying to chat with somеone, but all you’re seeing іs a black screen, there are а few things уou can check to fix it.
The tips below cover iOS, iPadOS, and macOS. We’ll indicate when a fix only applies to one of these operating systems.
Check Apple’s Server Status
Apple maintains a handy page where you can check whether any Apple services are experiencing problems. It’s worth quickly checking that page to ensure you aren’t struggling with something beyond your control.
Even if you don’t see any issues on the official page, it’s worth quickly searching social media for mentions of problems with the FaceTime service, just in case it hasn’t been reported to Apple yet.
If it does seem like you’re not the only one having issues, it’s better to wait a little while to see if the issue is resolved by Apple.
Update Your Operating System
Whether you’re using iOS, iPadOS, or macOS, FaceTime is an integral part of the system. While there should be no compatibility issues in general, it’s best that every participant has updated their operating system to the latest version, which at the time of writing is iOS 15 and macOS 12 Monterey.
Did Someone Forget Their Privacy Blocker On the Camera Lens?
It’s become popular (and sensible) to put special webcam privacy screens over webcam lenses to prevent spying by hackers. Before you start poking around settings and trying all sorts of technical fixes, check that you or the person on the other end of the line hasn’t left theirs on the MacBook or iOS device, physically blocking FaceTime video.
Reset Your Internet or Try a Different Connection
In some cases, your internet connection might be the culprit when it comes to a black screen on FaceTime. Video traffic may be blocked for some reason, or the connection quality is so poor that video transmission becomes impossible.
While it’s unlikely that an internet connection issue is behind your FaceTime black screen issue, it’s one of the easiest things to check. Turn off your router or other internet gateway device, wait a few minutes, and then turn it back on again. Alternatively, you can try using a different unrelated connection, such as your mobile phone hotspot instead of Wi-Fi. If the black screen issue remains while testing with a different internet connection, it probably isn’t the connection’s fault.
If you’re using a firewall, you need to ensure that certain network ports are open for FaceTime to work:
- 80 (TCP)
- 443 (TCP)
- 3478 through 3497 (UDP)
- 5223 (TCP)
- 16384 through 16387 (UDP)
- 16393 through 16402 (UDP)
If you don’t know how to open blocked ports on your firewall, consult the firewall’s help documentation, ask your system administrator at school or work, or have a look at our guides on finding open ports and port forwarding.
Close Other Apps That Might Be Using the Camera
Only one app can use the webcam at a time. Sometimes, an app may not give its claim to the camera back once you’re done. So it’s worth closing other apps that use the webcam, such as Skype or Microsoft Teams, just to be sure.
Reboot Your Device
If closing apps that have potentially taken hold of the camera doesn’t help, a great general strategy is to restart your entire device. Whether you’re on a Mac, iPad, or iPhone, restarting everything can help clear out minor bugs preventing the camera from working or FaceTime from using it correctly.
Rotate Your Phone
It seems like an odd solution, but on an iPhone or iPad you can try rotating the device between landscape and portrait orientation to get that black screen to go away. If your screen orientation doesn’t change when you rotate the phone physically, swipe down from the top right corner of the screen and toggle the orientation lock in the control center as shown here.
If you’re lucky, rotating between the two orientations will restore the video.
Disconnect and Reconnect
A bad connection between parties can be the reason behind a black video feed. The simplest answer is to hang up and call again. There can be numerous problems between your device and the other person’s device, including issues with the internet data route or problems with Apple’s servers.
Is It Accidentally an Audio-Only Call?
FaceTime allows you to make audio-only calls instead of a video call to save bandwidth or if you’re just not ready for anyone to see your face. You’ll see a button in the middle of the blank video screen to start a FaceTime call if you’re currently busy with an audio-only call.
Do You Have the Right Webcam Selected?
If you have more than one webcam connected to your Mac, it’s possible that the wrong webcam is currently selected. This wouldn’t usually show a black screen, but if that camera has a privacy blocker or is otherwise not working properly, you may see nothing.
In FaceTime, open the Video option from the menu bar and check if any cameras are listed there.
If you see more than one camera, choose the internal camera. You can also simply disconnect the external camera, and FaceTime should default to the Mac’s internal camera if it has one.
Some types of software may install “virtual” webcams, so even if you don’t have another webcam plugged into your computer, one of these virtual webcams may be selected instead.
Switch Between the Front Camera and Rear Cameras
One trick that appears to work for many iPad or iPhone users is to switch between the front and rear cameras. We think this may work by forcing the camera to re-initialize, but whatever the secret, this is an easy fix to try, and it seems to do the trick for plenty of people faced with a black FaceTime screen.
Force Quit the App
It’s worth doing a hard reset on the FaceTime app itself if nothing else has worked.
- On an iOS or iPadOS device, swipe up from the bottom of the screen until you see the app carousel. Then scroll left or right until you see FaceTime.
- Swipe the app up and off the top of the screen, then open it again.
On a Mac:
- Press Command + Space Bar, then search for Activity Monitor and open it.
- Look for the FaceTime process in the list and click on it to highlight it.
- Now select the Stop button.
- When asked if you’re sure, select Force Quit.
Open FaceTime again and see if things are back to normal.
Sign Out of Your Apple ID
This is another trick that has no clear explanation of why it works, but clearly, it does work for some people, and it’s quick and easy to try.
On your iPhone:
- Open the Settings App.
- Select your name.
- Scroll down to Sign Out, select it and complete the process.
After signing out, sign into your account again and try FaceTime to see if the bug is resolved.
On a Mac:
- Select the Apple button at the top left of the screen.
- Choose System Preferences.
- Select Apple ID.
- Choose Overview.
- Select Sign Out.
As with iOS, sign in again and then try FaceTime again.
Use a Different App
Unfortunately, we’ve now come to the point where the number of options has become thin on the ground. So it’s time to try something that isn’t FaceTime. It also means you can speak to Android friends, assuming you have any.
There are many great alternatives on the Apple Store, including WhatsApp, Zoom, and Telegram, which have iOS apps. Not only is this a quick fix if you have to get on a call with someone now and troubleshoot later, but it’s also a diagnostic step because if you’re also getting a black screen instead of video in an alternative app, it points to the issue being outside of FaceTime in particular.
Last Resort: Factory Reset
After exhausting every other practical fix, the last resort is to factory reset your device. This is a sledgehammer approach to fixing the problem, but we’ve seen it work just as it does for the annoying incorrect network password bug that sometimes crops up on iOS-family devices.
Be warned that there is no guarantee that a factory reset will solve the issue. For example, a factory reset is irrelevant if the problem was with an update or with Apple’s servers. You can use our iOS or macOS factory reset guides for exact instructions.
Since a factory reset is time-consuming, you may even lose personal data if things go wrong, so we strongly suggest you consider whether solving the FaceTime black screen issue is worth the risk. You may want to contact Apple Support first, and don’t forget to back up your data.
