Some Panasonic cameras allow you to use 4K Photo mode to shoot footage in traditional proportions, rather than in widescreen mode, as video is most often shot. Some cameras also include smart features to help you capture the best moment, such as a pre-recording mode that continuously records video and then saves 30 frames before and after you press the shutter button.
It's not always possible to extract good shots from a video, but if you intend to extract photos from a video, you will have access to manual aperture and shutter speed settings that will allow you to control the result.
Burst modes on most cameras have a speed of 5-8 frames per second.
It's much slower than 4K. Just as 4K increased the number of pixels by 4 times, the load on all equipment that works with data increased, namely memory cards, hard drives for storing information, and the computer processor for processing the material.
Which memory cards should I use?
4K video takes up a lot more space than Full HD, up to four times more in fact. One minute of video on some semi-professional 4K camcorders can weigh more than one gigabyte.
In order to keep up with all this data, you need fast memory cards capable of writing at least 30MB per second (which corresponds to a U3 rating on SD cards). This should allow you to record video with bitrates up to 200Mbps.
Memory cards are not as expensive as they once were, but high-speed cards still require a significant investment.
Storing 1 hour of video on different cameras
To save all the data for editing you need a large hard drive. In addition, low-RPM energy-saving drives will not be very convenient to use due to the lower speed of writing and reading data. If you use external HDDs, use devices with a USB 3.0 data transfer interface or a faster connection. Solid state drives (SSDs) are significantly faster than hard drives, but they are much more expensive.
Safe distance for watching videos on 4K screens
When watching movies recorded in 4K format, the user sees an increased number of dots compared to a standard HDTV image. When placed close to the screen, it is possible to see small details that are lost as the distance from the display increases. Calculations show that the recommended distance for viewing content on a 55-inch television receiver is in the range from 150 to 220 cm. To view small details, the distance can be reduced to 1-1.2 m, but the viewer begins to feel discomfort.
To roughly calculate the distance, you can use a formula like L=a*b. In the equation, the "L" parameter indicates the calculated distance. And the “b” value refers to the diagonal of the TV screen in inches. The letter “a” denotes a correction factor equal to 2 or 3. It follows from the formula that the larger the diagonal of the screen, the greater the distance between the viewer and the screen should be. And if a display with a curved matrix is used, the user is positioned along the axis of symmetry of the equipment. In this case, the position of the screen relative to the eyes is additionally taken into account.
Do I need a new computer?
Just as 4K video requires a lot more storage space, it also requires a lot more processing power to handle the load when it comes to editing the footage.
As always, when looking at computer performance, you need to pay attention to the speed of the processor, the number of cores, the performance of the video card, how much RAM is installed, as well as the type and capacity of the hard drive.
Minimum PC requirements
| CPU | RAM | Video card | HDD | |
| 4K | Top quad-core | 16GB or more | NVIDIA 600-series or higher, or AMD R5-series or higher | 1 TB or more |
| 1080p | Quad-core | 8GB | Dedicated GPU | 256GB or more |
What is a pixel?
Since the concept of “4K” is closely related to the concept of “pixel,” it is worth dwelling on the definition of this mysterious foreign word. So, pixel or pixel (px) is a word originating from the English language, formed from an abbreviation of two words: “pictures”, “element”, that is, “image element”. Another decoding option: “picture cell”, which essentially means the same thing.
A pixel is the smallest two-dimensional graphic element of any digital image. This term has become widespread from raster graphics, in which the image is a mosaic of individual color dots. A pixel is also called the smallest (indivisible) physical element of the display matrix. Such an object can be round or rectangular in shape, and in plasma panels - octagonal.
The 4K format contains lines of approximately four thousand pixels. It compares favorably with other, less pixel-rich formats, since by increasing the number of px per unit area of the “picture,” its quality improves.
A feature of pixels in a raster image is the impossibility of improving an already created video sequence or picture: when such a visual object is enlarged, the pixels simply turn into large colored blurry grains arranged like steps. Of course, interpolation can smooth out an image that has turned into “mush,” but to do this you have to add new pixels, the color of which is calculated based on neighboring colored dots (squares).
What kind of monitor do you need?
You can shoot, edit and publish videos in 4K resolution, but how can you do all this if your monitor is not capable of displaying such a resolution?
If you're looking for a 4K monitor, prepare to spend a pretty penny and look for the "IPS" designation. IPS panels win when it comes to color accuracy at different viewing angles. If you already have a color-accurate monitor, you can buy an inexpensive 4K monitor to do the cropping and detail work, and do the color grading on the old monitor.
One option for working with video is editing in low resolution and then exporting to 4K
How to edit?
Adobe Premiere Pro CC from Adobe. Available on both Windows and OS X
Editing 4K footage not only requires a powerful computer, you also need specialized software.
There are many programs for editing video content, and as 4K becomes more common, support for this resolution is expanding, even in inexpensive programs like Apple's iMOVIE. But to achieve the best results, it is recommended to use more powerful programs such as Adobe, Premiere Pro or Apple Final Cut Pro X.
Final Cut Pro X from Apple. Available on OS X only
Just keep in mind that different cameras shoot video differently, and different video editing software interacts with these file formats differently, so you should do some research to find which programs provide the best performance and experience with your footage.
How to play YouTube video at 30 fps on UHD Graphics 630
Here is test video 2. Again I took what I came across. I made sure that they were honest 8k, and not a 640x480 video stretched to 8k.
8k video
YouTube video test 1920x [email protected]
Network speed ~ 3 Mbit/s. CPU utilization ~ 8%, UHD Graphics 630 GPU ~ 5%. Everything just flies.
Very beautiful picture. Resources are almost completely free.
Let's move on.
YouTube 2560x video test [email protected]
Network speed ~ 15 Mbit/s. CPU utilization ~ 20%, GPU UHD Graphics 630 ~ 6%. Still pretty good.
Pleasant indicators. The video will not be interrupted when running other tasks.
YouTube 3840x video test [email protected]
Network speed ~ 38.6 Mbit/s. The CPU load is ~53%, the UHD Graphics 630 GPU is still the same ~5%. Everything is quite good. The video plays smoothly, without jerking. There is a performance reserve.
The Intel Core i3 10100 graphics core can handle a YouTube video 3840x [email protected] .
YouTube 7680x video test [email protected]
Network speed ~ 63.2 Mbit/s. CPU load ~ 100%, GPU UHD Graphics 630 funny ~ 3%. Everything is very bad. The video plays jerkily and freezes. It's completely impossible to watch.
The graph shows that the hardware cannot cope with video processing and output.
So, an intermediate summary of the performance of the built-in video UHD Graphics 630 of the Intel Core i3 10100 processor. The maximum YouTube video resolution available for comfortable viewing:
- 3840х [email protected]
- 2560x [email protected]
Currently reading: 100 rubles for spare parts for self-repair versus 20,000 for new devices
How to share?
Let's say you've created your work in 4K resolution and are ready to share it with the world. But before you do, here are some things to think about.
If you want to share your work in full 4K resolution, you can easily share files directly using online cloud storage services, but depending on your internet connection speed, uploading and downloading will take a long time. 4K videos are still not very well supported by sites, but Vimeo allows 4K uploads. YouTube also offers 4K, but does heavy compression.
Finally, consider the option where you can shoot in 4K and take full advantage of panning, zooming, and resampling to improve the quality of your output. As a result, you can export Full HD, which is still relevant and will remain so in the coming years. But still think about the future. As 4K monitors and TVs become more affordable over time, your content will one day lose the appeal of Full HD resolution, so if your projects need to remain relevant years from now, start using 4K export now.
Source: https://photar.ru
What's the difference between 4K and 1080p
4k quality is the resolution of the TV matrix. 4K means a resolution of 3840x2160, FullHD means 1920x1080 pixels. On the same diagonal, a 4K TV will have almost 4 times more pixels. This directly affects image clarity when playing high-quality content. Otherwise, resolution does not affect the characteristics of the TV in any way. At the same time, 4K devices, as a rule, are equipped with a brighter 8-bit or 10-bit matrix, so the overall picture of such products is also better.
It is worth noting that if the signal source has a resolution below 1920x1080 (for example, 1280x720), then the difference in image quality on a 1080p and 4K TV will be almost invisible. However, there are premium TV models that have an upscaling function, which allows you to improve low-quality content in real time.
