评测:松下LiveCTRL多摄像头实时切换PTZ iOS应用程序

紧密的相机集成

Within the Settings area (图5)，您可以设置网络ID，以便您可以为特定设置隔离设备. Settings is also where you determine your transition, 切割或交叉溶解, 以及持续时间, 尽管我认为这应该放在主界面中，这样你就可以在节目中访问它.

图5. LiveCTRL设置

You can save the stream file, connect and disconnect from social media CDNs, 改变你的RTSP模式, as well as video latency and data rate. 还要改变键盘快捷键——这是另一个非常方便的功能，用户可以使用蓝牙键盘来拥有一个物理控制界面，而无需查看即可操作.

使用专业的松下PTZ相机也打开了整个主机的功能和选项. 你不仅可以拥有一个由RS-232或422控制器控制的相机, 但这些相机也提供HDMI或SDI输出，以及MicroSD卡的内部录音. 这可能提供了通过摄像机视频输出将孤立的摄像机馈送到您选择的目的地的能力.

You could potentially even leverage the cameras’ video output, in addition to the streaming output, 使单个摄像机能够被两个不同的视频混合解决方案访问. 这对于需要为房间中的IMAG提供SDI提要的事件非常方便, 流媒体混频器可以共享摄像机，还可以提供仅供远程观众使用的备用馈送.

Within the Panasonic LiveCTRL app, 您可以深入了解相机的流配置设置:H.264, JPEG video, quality, frame rate, and image size, etc. 音频设置利用相机背面的1/8“立体声输入，用于麦克风或线级输入, power for a microphone input, 自动液位控制, 手动液位控制, and even a few different audio equalizer settings and bitrate.

在“系统设置”界面中，您可以获取摄像机的IP地址, toggle the tally indicator, on-screen-display, 图像翻转, 摄像机物理视频输出的输出视频格式, 以及内部记录格式到内部MicroSD卡.

图像调整使您可以在相机中存储三种不同的预设, 以及调整相机的图像参数为这些预设. 这对于那些从一个事件移动PTZ头到另一个事件的人来说是很好的, but have a few recurring events, like an outdoor soccer game, and then an indoor basketball game, 相机设置可以存储在每个位置，以加快设置.

The networking tab lets you dive in and manually assign IP, 子网, 网关, DNS, 和更多的, 当使用非管理型交换机将设备与手动IP地址连接时，哪些是重要的. All of this is directly accessible in the LiveCTRL app. 松下相机和LiveCTRL应用程序之间的紧密集成在这个级别的相机控制中是显而易见的.

Producing a Show in LiveCTRL

LiveCTRL界面对我来说很熟悉，因为它与Cinamaker的应用程序非常相似. PTZ预设部分和深度相机控制显然是新的. But the way you mix cameras, add titles, videos, etc.那都是一样的. 如果你读过我对Cinamaker的评价，你可以
apply the takeaways I had with that, here with LiveCTRL.

The Cinamaker Help overlay is here as well, 这使得那些新接触这种生产解决方案的人更容易更快地跟上速度. 您可以为保存的文件命名，这使得查找它们比仅使用日期要容易得多 & 时间戳. Having the ability to save
projects, or Sessions, is a great feature. Customizable keyboard shortcuts are good as well.

While these apps only show four source windows, these four sources do not include videos, which can be set to overlay the camera sources. So if you have five or 10 videos to play back, you have all them in addition to your four live video sources. 另外，你有能力调整每个视频剪辑的音频. 这很方便. Overlays, corner bugs, fullscreen graphics, titles, etc., are all in addition to your four video feeds.

但是LiveCTRL和Cinamaker仍然需要一些功能, like a master Program audio meter. It’s nice to know what your source level is, and what your video clip is, but it’s hard to see them next to each other, or right after each other to know they’re close to the same, 而不是剪切. An audio meter on Program would fix that.

我还与松下的代表进行了交谈，他帮助我进行了评测, about some possible interface tweaks, 特别是, more screen real estate to see PTZ presets. This is the calling-card feature of this app, 所以我希望不用滚动就能看到和触摸到两行图标, as opposed to just 3 icons and part of a fourth. 是的, 你可以滚动, but it’d be nicer to have at least four across, 再往下两行, providing for one tap direct access to at least 8 presets, and the ability to scroll to more.

The built-in titler is also very basic. You can bring in transparent images for backgrounds, but each text layer is separate, 所以最好是在外部构建完整的标题，然后将完成的透明标题导入LiveCTRL.

总之

这些小的接口问题不会影响松下LiveCTRL利用松下广播PTZ视频头的能力，这在任何iOS解决方案中都是不可能的. This isn’t just using a couple iPhones, 不过如果你愿意的话，你也可以很容易地添加一个iPhone作为源. 这不仅仅是将摄像机插入HDMI适配器并在视频混频器中看到视频. This is deep integration of the camera’s control, 和设置, 应用程序本身, 专注于最切实的好处-存储预设和在一秒钟内移动镜头之间的头部.

LiveCTRL充分利用了松下PTZ头提供的广播级视频, 简单地说, 清洁, and very easy-to-carry iPad interface.

[This article appears in the October 2019 issue of 流媒体杂志."]

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