What is frame rate (FPS)?
Did you know that there is a word “frame rate” in the term for video settings?
The network video camera specifications also have this “maximum frame rate” item.
So what exactly does this frame rate mean?
This time, I will explain the frame rate in detail.
The frame rate is a picture from a flip book
Table of Contents
The mechanism of the video is the same as that of the flip book.
Frame rate is a factor that determines the smoothness of a video.
What difference is there in the value of the frame rate?
Frame rate doesn’t have to be high
What value should I set?
What is frame rate (FPS)? What value should I set? resume
Basic video knowledge
The mechanism of the video is the same as that of the flip book.
Video and still images may look different, but video is a collection of still images.
It seems to move by taking a lot of still images and displaying them continuously. This is a video.
For those who have a hard time imagining, I think it will be easier to understand if they can imagine a flip book.
In flipbooks, the greater the number of flipbooks, the smoother the movement, and the lower the number, the more uneven the movement.
A video is like a flip book with many images.
Frame rate is a factor that determines the smoothness of a video.
When making a flip book, you can expect the latter to be a smoother move between “viewing 50 images in 10 seconds” and “viewing 500 images in 10 seconds.”
The factor that determines this smooth movement is the “frame rate”.
“Frame rate” is the number of still images (frames) displayed on one movie per second. The unit is “FPS” (frames per second), which means “frames / second”.
If you express the book
animated in frame rate, you will see 50 images in 10 seconds … 5FPS (view 5 images in 1 second)
500 pictures in 10 seconds … 50FPS (50 in 1 second) See picture)
It will be expressed as such.
As you can see, if the value of the frame rate is large, the video will be smooth, and if the frame rate is small, the video will be hidden.
Frame rate is a factor that determines the smoothness of a video.
What difference is there in the value of the frame rate?
So how much difference does the smoothness of the actual video appear when you change the frame rate value?
For example, the world record for the 100m running is 9 seconds 9, but if you shoot at different frame rates,
・ When shooting at a frame rate of 1 FPS
⇒ 9 frames of still images at 100 m. The first and second images will be 10 meters ahead.
・ When shooting at a frame rate of 5 FPS
⇒ 49 frames of still images at 100 m. The first and second images will be 2 m ahead.
・ When shooting at a frame rate of 30 FPS
⇒ 297 still images at 100 m. The first and second images are 0.3 m ahead.
If you change the FPS value, this difference will appear.
In fact, I took a video.
What is the difference between videos based on frame rate (FPS)?
Frame rate doesn’t have to be high
If you read this far, you might think that “the higher the frame rate, the better.” But there are some downsides.
Frame rate doesn’t have to be high
A high frame rate means that a lot of still images are sent, so the amount of data sent is large.
Therefore, (
1) affects network equipment and line costs (
2) a large capacity hard drive is required to record
(when the number of cameras is large, the effect may be particularly large and the cost may be high) (
3) image quality when stopped deteriorates
(it is necessary to increase the size of the video data to improve the image quality)
There are also downsides like, so the higher the frame rate the better.
What value should I set?
The network camera’s frame rate setting varies depending on the purpose of use and the shooting objective.
For example …
・ If you want to confirm a series of movements ⇨ Approximately 24 to 30 FPS
・ If you want to emphasize confirmation of paused images ⇨ About 1 FPS to 5 FPS
Depending on the application, it may be necessary to verify the image from a security camera.
