4K和1080p视频剪辑问题

问题一: 视频编辑是否核心数越多越好?

到必定核心数前是这么, 结合Puget Systems的测试4K Export到8C, 4K Preview到16C左右, 核心数再往上提升变小

FAQ 1: Will a CPU with more cores help with video editing?

The short answer: Yes, until you reach a high number of cores.

Video editing uses CPU processing power in two main ways:

1. Encoding and exporting the videos

2. Generating video previews during the editing process (so you can see what you're editing)

Puget Systems looked into the benefits of multi-core CPUs in a very helpful Adobe Premiere Multi-Core CPU test. They tested video exporting on a system using dual 10-core Intel Xeon processors, providing a total physical core count of 20.

Exporting 1080p H.264 video, Puget Systems' tests found that Premiere could utilize 10 CPU cores before performance plateaued. For a complex project timeline, tests showed that 2 cores produced 2x the performance of 1 core, 5 cores resulted in 4x the performance, and 10 cores produced 6x the performance. Trying to utilize 16 or more cores, however, actually caused a noticeable drop in performance to around 5x.

Exporting 4K H.264 video, the CPUs topped out at around 7 or 8 cores. Using 2 cores for a complex timeline resulted in nearly 2x the performance of 1 core, 4 cores nearly 4x, and 7 cores roughly 5x.

Generating video previews with higher core counts provided similar returns. Again, when generating 1080p video clips, the CPUs topped out at 10 cores. Using 2 cores resulted in 2x the performance, 5 cores for 4x the performance, and 10 cores for more than 5x the performance.

Most impressively, generating previews with 4K video clips produced increasing results up until 16 or 17 cores. Complex timelines with 4 cores still produced 4x the performance, 8 cores produced more than 6x the performance, and 16 cores produced nearly 8x the performance of 1 core. This test saw the greatest benefit of multiple cores.

问题二: 视频编辑选什么CPU?

资金充足但不是特别高的状况下i9-7940X是最均衡的选用(对X299 OC的人来说也是这么), Skylake-X出来以后Xeon不再是首选

FAQ 2: So, what CPU should I get for video editing?

This will largely depend on your budget.

You are free to try editing videos on any CPU you can afford. A dual-core Intel Pentium such as the G4560 will work for editing videos at 1080p resolution. But the bigger you go with your CPU, the better performance you'll get.

For 1080p video editing, we recommend an Intel i5-8400. 6 Powerful, efficient cores for a lot price offers huge value. Ryzen 5 CPUs, such as the AMD Ryzen 5 1600, are also a good option, although slower.

For greater performance at 1080p or 4K, we recommend an Intel i5-8600K, i7-8700, or i7-8700k. The i5-8600k is a faster version of the i5-8400 which is also overclockable. The i7-8700 is faster still, and adds hyperthreading, which improves video editing performance. The i7-8700k is not much faster than the i7-8700, but can be overclocked for additional speed.

AMD Ryzen 7 CPUs are also good for video editing, but simply can't match the efficiency of the Intel i5s and i7s.

For even greater performance at 4K or higher,we recommend the Intel i7-7820X. 8 cores and 16 threads adds about 20% more performance above the i7-87004k视频怎么转换成1080p, but the prices are increasing faster here.

For those with large budgets, the mighty 14 core, 28 thread Intel i9-7940X will give you the best performance possible for video editing. With an unlimited budget you could get the 18 core, 36 thread i9-7980XE, but the real-world performance is about the same. You could also spend a lot more money on dual Intel Xeon CPU, which would give you faster rendering, but would be slower for almost everything else (not recommended, even for unlimited budgets).

Are Intel Xeon CPUs still worth it for video editing?

In the past, a dual Xeon workstation was the way to get the best video editing performance. Exporting, rendering, and encoding all benefit from a lot of CPU cores. Up to about 16 cores improve performance. However, there is a tradeoff between cores and clock speed. The best performance is attained by balancing core count with clock speed. Currently, the best balance of core count and clock speed is the 14 core, 28 thread Intel i9-7940X. Dual socket Xeons offer the same or less performance due to slower individual cores, even the monstrous Xeon CPUs with 20+ cores won't give more performance.

问题三: 是否应该强劲的显卡?

不需要

FAQ 3: Should I get a powerful video card for video editing?

Once you have an OK video card, investing in greater GPU power will NOT significantly improve video editing performance.

Some people will cite unreliable synthetic video rendering benchmarks, such as the Premiere Benchmark Project, as evidence that powerful GPUs cut rendering time by large amounts. However, in real-world situations, the performance difference between a moderate GPU and a powerful GPU isn't very significant.

Studio1Productions has some great insight in an article comparing video editing performance between multiple graphics cards.

Using the Premiere Benchmark Project (not a real-world test), their GTX 660 graphics card performed a render in 58 seconds. After upgrading their graphics card to a significantly more powerful GTX 780, the benchmark’s render time dropped to 22 seconds. On paper, that seems like an amazing leap in performance.

However, when they used the same two graphics cards to render a real Adobe Premiere project, the GTX 660 performed the operation in 150 seconds, while the GTX 780 took 146 seconds. Not nearly as exciting.

The reason for this difference is that the synthetic video editing benchmarks specifically run your PC through a series of GPU-focused processes. Real video editing, however,just doesn’t have many processes that rely on the GPU4k视频怎么转换成1080p, meaning that extra GPU power doesn't help all that often. (Unless you're using DaVinci Resolve.)

问题四: 视频编辑工具是怎样利用显卡的?

FAQ 4: How does video editing software use video cards?

Most video editing software mainly relies on the CPU, and only uses your GPU for specific purposes. Those specific purposes include:

GPU-accelerated presets (Fast Blur in/out, Mosaic in/out, etc.)

GPU features (Blending Modes, Scaling, etc.)

Video effects (Brightness/Contrast, Color Balance, etc.)

Video transitions (Cross Dissolve, Dip to Black, etc.)

Lumetri looks (Cinematic, Temperature, etc.)

至于SSD选择, 可以看最新出的900P评测, 里面的CGI渲染测试和视频编辑应该属于同一范畴

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