英伟达RTX显卡是否适合视频编辑？Do NVIDIA’s GeForce RTX work with video editing?
作者：Exjai
written by：Exjai
英伟达新推出的RTX系列对于Adobe的使用者来说并没有很大的吸引力，但是对于DaVinci Resolve使用者来说，RTX系列的表现相比GTX 1080 Ti高出50%，RTX显卡体现了两个未来的趋势：Tensor cores 和 RT cores.
NVIDIA’s new GeForce RTX series GPUs are not only faster but include 2 major new features never seen before in consumer level cards: Tensor Cores and RT Cores. It is because of these new features that the future looks good for Adobe and Blackmagic software video editing. Even if right now there is not that much improvement in rendering times.
Copyright © 2018 NVIDIA Corporation
什么是Tensor Cores?？
最初的时候只有在英伟达的数据中心显卡中才会提供Tensor Cores，但是目前该技术被广泛应用于主流的GTX系列显卡中，任何消费者都可以轻松地购买并体验。Tensor Cores 给予了显卡大幅度增加其计算的能力，通过一个4×4的矩阵，它完成了D=AxB + C的操作。其中A、B、C和D是4x4矩阵。输入A和B是FB16矩阵，而累积矩阵C和D可以是FP16或FB32（见下图），这使得Tensor Cores在RTX显卡中的FP16上的运行达到不可思议的110TFLOPS（GTX 1080显卡为17.8TFLOPS）。Tensor Core技术主要被应用于人工智能，这也是当下AI如此风靡的原因。Tensor Cores大幅增加了矩阵运算的速度，除了新的神经图形函数之外，它还被用于深度学习训练和推理操作。总而言之，这项新技术使我们看到了显卡性能的显著提升。
What are Tensor Cores?
Originally only available in NVIDIA’s Datacenter GPUs, Tensor Cores have now arrived on the mainstream GeForce GPUs that any consumer can buy off the shelf. Tensor Cores allow the GPU to dramatically increase its computing power. It does this by operating on a 4x4 matrix while operating the following operation; D=AxB + C, where A,B,C and D are 4x4 matrices. The inputs A and B are FB16 matrices, while accumulation matrices C and D can be FP16 or FB32. (see image below)
This is what allows the Tensor Cores in the RTX cards to run at an incredible 110 TFLOPS at FP16 (the GTX 1080 runs at 17.8 TFLOPS). Tensor Core technology is mostly used for artificial intelligence applications and have been one reason the current Ai boom is so strong. Tensor Cores provide a significant speed upgrade to matrix operations and are used for both deep learning and inference operations in addition to new neural graphics functions. So, with this new technology we should see a significant improvement in GPU performance.
Copyright © 2018 NVIDIA Corporation
Tensor cores 会在视频编辑中应用吗？
Tensor cores 已经应用在比较贵的Titan V 显卡中，RTX在应用 tensor cores的同时也保持着比较合理的价格。CUDA cores通常是为了处理大部分的工作，Tensor cores的设计主要是为加快使用人工智能去噪、分辨率缩放和视频重定时等功能的速度，从而提高质量，节省时间。NVIDIA RTX 的 Tensor Core 处理器为您提供所需性能，迅速进行深度学习训练和推理。Blackmagic已经宣布将在DaVinci Resolve 15/达芬奇调色台15中使用英伟达的Tensor cores,从而提高AI加快去噪、分辨率缩放和视频重定时等功能的速度。但目前为止，Adobe还没有宣布任何相关消息。即使全面应用Tensor cores, 也可能不会提高看直播 和每秒传输帧数或存储的速度，但是Tensor cores将会加快去噪、分辨率缩放和视频重定时等功能的速度
Are Tensor Cores useful when doing Video Editing?
The appearance of Ai dedicated technology on consumer level cards was a shock to many. Many software companies including BlackMagic (Davinci Resolve 15) have already announced that they are working to implement Ai interfacing for graphical enhancement. It is not yet clear what the plans are for Adobe. However, even if the Tensor Cores are fully integrated it is not going to improve export times or even video playback since those actions do not use AI interfacing(yet). When being used for auto masking, denoiser or even color matching the AI interfacing will show a massive improvement.
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什么是 RT Cores？
在RTX显卡中的RT和RT Cores都代表着光线追踪，正是因为cores的加入让RTX系列的显卡变得如此的特别。光线追踪踪是一种通过跟踪图像平面上的像素的光的路径并模拟其与虚拟物体的接触效果来生成图像的技术。在过去我们看到的电脑生成的图像，都是程序员和设计师通过栅格化技术操作的。这是因为旧版本的显卡虽然也可以执行光线追踪，但是它模拟运行的进程过于密集，通常需要数个小时甚至数天才能完成一个场景。光线追踪可以产生更逼真的照明效果模拟, 包括对专门设计用于实时运行光线跟踪的cores进行计算。确切来说，72 cores 是一个巨大的突破。
What are RT Cores?
The RT in RTX and RT Cores stands for Ray-tracing. It is the inclusion of these cores that makes the RTX series of GPUs so unique. Ray-tracing is a technique for generating an image by tracing the path of light through pixels in an image plane and simulating the effects of its encounters with virtual objects. In the computer-generated graphics, we have seen in the past, artists and programmers have used a technique called rasterization. This is because although older versions of GPUs could do Ray-tracing, it was always too intensive of a process to run full time simulations and would often take hours if not days to finish a scene. Ray-tracing can produce a much more realistic simulation of lighting effects and the inclusion of cores specifically engineered to run Ray-tracing calculations real time, 72 cores to be precise, is a massive break through.
Copyright © 2018 NVIDIA Corporation
RT Cores会应用在视频编辑中吗？
RT cores是在这一代的显卡上应用的新技术，主要用途为实现光线追踪技术。我们目前没有任何关于RT cores应用在视觉效果或动态影像设计以及什么时候应用RT cores新技术的消息。
RT cores与Tensor core的新技术是RTX显卡的主要卖点，所以消费者购买RTX显卡主要是为了在开发者提供相关的支持后来升级自己的工作站，以便于第一时间享受tensor和 RT cores的带来的技术优势，目前不清楚tensor, RT cores将如何运用在Adobe 或 Blackmagic上。尽管如此，我们也获得了RTX 2080与 2080 Ti在视频编辑上的表现 :
Are RT Cores useful when doing Video Editing?
The Ray-tracing cores introduced into this new generation of cards are only used for ray-tracing. As such, it will be possible to use the RT-cores for visual effects and motion graphics in the future. Therefore, the new features of the RTX GPU are clearly important for anyone looking to future-proof their new workstation. When the developers add support for ray-tracing cores your workstation will already be primed to take advantage of the new technology. Right now, however, it is not clear exactly when Adobe or Blackmagic will fully implement these new technologies. We have taken the time to still run tests and benchmarks on the new cards as they would be used today for creators and artists running these programs.
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RTX 2080 8GB是否适用于视频编辑？
当你在使用RTX 2080显卡来进行视频剪辑时，你几乎注意不到它和之前的GTX系列显卡的区别。数据显示VRAM在视频剪辑应用中占有很大的比重，所以我们看到RTX2080保持在8G VRAM这个基准上。由于目前Blackmagic已经宣布将会应用Tensor和RT cores在未来的Resolve 15达芬奇软件中，我们也希望Adobe在自己的软件中使用它们。因此，目前购买此显卡只能是为了将来可能使用新的工作站来应用视频剪辑的新科技，并不能够大幅度提升目前的状态。
Is the RTX 2080 8GB worth it?
Using the RTX for video editing software you are not going to see a difference between it and the older GTX series GPUs. The data shows that the VRAM is a larger factor in video editing applications. Therefore. we see the 8GB of VRAM really hold the RTX 2080 back in this benchmark. Since Blackmagic’s Resolve 15 will use Tensor and RT cores in a future update, and we expect Adobe to do this as well the only reason to buy these cards for video editing is future proofing a new workstation instead of upgrading a current one.
RTX 2080 Ti 11 GB适合用于视频编辑吗？
尽管目前Adobe没有任何关于使用新显卡技术的消息，我们仍然使用这个显卡来见证新的工作站，因为Blackmagic对DaVinci Resolve调色软件中进行大规模更新的程度甚至超过了更贵的泰坦-V显卡，因此对于任何一个使用Blackmagic来进行视频剪辑的工作者来说，将自己的工作站升级至这张显卡是一个不错的选择。
Is the RTX 2080 Ti 11GB worth it?
Even though Adobe has not shown any improvement using the new technology, we would still future proof a new workstation with this card. DaVinci Resolve from Blackmagic however shows a massive improvement and even performs above the much more expensive Titan V. For people using Blackmagic for video editing it is a good investment to upgrade any workstations to this card.
Copyright © 2018 MYEINN HK LIMITED
买易赢团队总结与应对
测试的数据显示，目前没有显著的理由去升级RTX系列的GPU，除非文件或视频过大，需要几个小时以上存储或渲染。直至Adobe和Blackmagic升级相应代码以适用于新的GPU cores, 那个时候消费者需要建立新的工作站，并不仅是升级现有的工作站，我们才建议消费者升级到新的GeForce RTX显卡。
MyEinn PC Team summary and response
The test data shows that there is currently no significant reason to unless the file or video is too large and takes more than a few hours to store or render.
Consumers who need to build new workstations and not only upgrade existing workstations are recommend choosing the new GeForce RTX graphics card, as updates from Adobe and Blackmagic will surely use the new cores.