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What video bitrate is appropriate for video? Part 2

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What video bitrate is appropriate for video? Part 2

Ultra Clear 720P>=1.5M (Standard 1280×720 resolution, minimum 960*540, this and higher resolutions are in MP4 era) [some websites have this minimum requirement to upload]

Blu-ray 1080P>=2.5M (1920 × 1080 standard resolution) [optimal 4-8M] [220M when the material is stored] [some websites have this higher requirement for uploading] (it is better to use 720P and 1080P when make videos )

2K=(2048×1080 resolution)
4K=(4096×2160 resolution) [Optimal 8-12M]
The most normative statement is:
reaching 720p resolution is the threshold for high definition signal sources, 720p is called the HD (high definition) standard;
up to 1080p resolution, known as the Full HD (full high definition) Blu-ray standard.
2K refers to 2048 × 1080, and the actual resolution of Quad HD (four times high definition, 2K can be called “four times ultra high definition”) has various specifications, and the ones listed above are just common specifications. ;

4K refers to 3840 × 2160, and the actual resolution of Quad Full HD (four times full HD, 4K is called “four times ultra full HD”) has various specifications, and the ones listed above are just common specifications. .
Blu-ray is the clearest and SD is the worst If your internet speed can’t bring you 1080p, then at least 720p won’t feel blurry to the naked eye.
P refers to the number of horizontal scan lines, and the higher the number, the higher the resolution of the image. The letter P stands for progressive scan.

1. What is the video bitrate?

Video bitrate is the number of bits of video data (color, brightness, and pixels) that are output per second. The unit generally used is kbps.

2. Recommended bitrate for video size and resolution

How much video bitrate is appropriate (above H.264 bitrate, 720P, 1080P output bitrate setting)

3. A set of formulas to set the bitrate is shared with you as follows:

How much video bitrate is appropriate (above H.264 bitrate, 720P, 1080P output bitrate setting)

Regarding the two items of “Use the highest rendering quality” and “Process with the maximum depth” when exporting from PR editing software, the effect of image quality is not obvious on the big screen and the output time can increase exponentially depending on the complexity of the track. I also encountered this problem in the morning. I have been there, it is a waste of time and the effect is average. So I usually don’t choose this.

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What video bitrate is appropriate for video?

At present, 720p video recommended minimum bitrate is above, h.264 encoding 2M bitrate is adequate, 1080p is 4M enough
to get a high-quality video, convert it with different bitrates, and then compare the image quality.

The most commonly used are: h.264 encoding, 1080P, 2.5M bit rate or more.
Summary: [h.264 encoding, 2.5M bitrate (up to 4M), maximum 4M bitrate (add 2M to target), most platforms are Blu-ray. 】

1. If the bitrate is higher than the original video, it will not be a bit higher than the original video. When you move, you’ll pick a lower point to compress the file a bit.
2. 1080P 1M bitrate has distortion feeling to watch on computer, and 2M can’t see distortion, you can adjust the bitrate to 4M to get the best.
The following are the bitrate upload requirements for a platform:

How much video bitrate is appropriate (above H.264 bitrate, 720P, 1080P output bitrate setting)

***Normal 240p, 320p SD, 480p HD, 720p Ultra HD, 1080p Full HD (Blu-ray), 2K, 4k Ultra HD ***
Normal 240P (320×240 standard resolution, it was 3GP, this is basically nobody used)
SD 270P<0.8M (360×270 standard resolution, was 3GP, rarely used) [140M when storing 422 materials]

High definition 480P (360P)>=0.8M (standard resolution of 640 × 480, minimum 480 * 360, was 3GP) [480 re-advertising is called high definition, but the normative statement can only be regarded as standard definition]

What is bitrate in a video? | Improve QUALITY

Video Bitrate

Bitrate is, without a doubt, one of the main characteristics that determine the quality of a video.

I’m glad you made it this far to continue learning about video. If you still don’t know about video or editing, remember that you can learn the basics with my video courses (among others).

bit rate

What is video bitrate?

The bitrate or bit rate is the amount of information per second that the video has. It is measured in megabits per second and is directly proportional to its quality.

Generally, we tend to confuse the size of the video with its quality, thinking that 4k size is the video that offers the highest quality. However, this is flatly incorrect.

A high bitrate offers quality: Size VS Quality

Continuing with the topic I was talking about, it is very common for videos with 4k (at least those from professional cameras) have a higher bitrate. This is what makes the video look better quality, mainly, regardless of whether the video is larger or smaller.

How do you notice the difference between a high bitrate and a less high one?

The bitrate tends to show significant differences not simply when recording, but when editing. As I have already told you, with a bitrate of 10-15 mbps / s (at 25 fps) you have more than enough for most jobs. However, and if you are very exquisite, you may want to use a higher bitrate to have more margin for error when correcting and color grading. By the way, if you are interested in learning about color correction and color grading, check out my course.

With a higher bitrate you will notice the following differences than with a lower one:

Sharpness increase.

Superior ability to edit color without the appearance of banding or other unwanted disturbances.
Greater file weight (the higher the bitrate, the larger the file occupies).
However, this is not to say that it will be noticeable for most jobs. If you work in events, I assure you that you will not have a problem.

Bitrate types

If you are one of those who want to know more about everything you study, you can stay and delve deeper with me.

There are two types of bitrate, the constant bitrate and the variable bitrate.

CBR: this is the bitrate that always, whatever is on the plane, the exact same transfer rate will be used. The good news is that a video recorded at a specific size and bitrate will always occupy the same amount. However, it is not the most efficient.
VBR: this is the variable bitrate, and it consists in that a different bitrate will be applied depending on the information that is being recorded. Obviously, if you are recording a super dark black background, you don’t need as much information as if you are recording a scene with a very wide color gamut and a histogram that is padded from blacks to whites. In this case, the bit transfer rate will vary according to the needs of what is being recorded. Of course, we will try to keep an average (the chosen one).
How to know the bitrate of a video, both on Windows and Mac?
I am going to explain to you, both for Windows and Mac, how to find out the bitrate that a video clip has. This is very good because you can see that a video loses quality the more compressed it is. And one of the ways to compress it is by lowering the bitrate.

Windows: right-click on the clip> properties> details tab> video section> total bit rate
Mac: you open the video with the quicktime player> while it is playing press cmd + I> data rate
It is important that you pay attention to whether this data is in kbps or in mbps, because the first is 1000 times less than the second (so that you take it into account in case you want to compare looking from two different computers).

When to compress a video by lowering its bitrate?

There are times when you have already finished editing the video and obviously want to compress it. For this I recommend that you learn about codecs and video formats.

Obviously when you compress the video you will lose quality (the bitrate will decrease). This, a priori, should not be noticed in excess if it is a good compression, since you will no longer edit that video.

Of course I am talking about compressing the final file, never the raw ones used to create the video. You always have to lower the bitrate or compress the final file (in case you want to compress) to avoid losing image quality.

Bit rate factor – how does it contribute to video quality?

Bit rate is a very important factor for good video quality. In the camera settings we now find more numbers next to the resolution. The one behind Mbps interests us more now. This is the information about the bit rate.

Video Bit Rate

This number indicates how much information is processed in the video per second. The higher this rate, the better the quality. Of course, the final file the camera produces will increase with the bit rate.

In this way, you can also calculate how much information is available for each frame, that is, each individual image. Suppose you are shooting with 25p and you have an available bit rate of 100 Mbps. That would mean that each image carries 4 Mbps of information. If you shot 50p at the same bit rate, it would only be 2 Mbps per image! The result would be a loss of image quality.

Color depth factor – How does it contribute to video quality?

Bottom line: color depth is the maximum number of different color shades that a camera can display. Of course, the same applies to monitors, printers, televisions, etc.

The colors in general in our image consist of additive combinations of the three basic colors red, blue and green.

The gradations in each tone are again given in bits. Videos consist of pixels, that is, square image points. Each of these pixels carries with it certain color information. The higher the bit rate of the color depth, the more different shades of color each pixel can have.

The total number of color tones is calculated by adding 2 to the power of the number of bits; for an 8-bit camera, for example, that would be 256 colors per base color. Now you have to multiply the other two basic colors again to determine the total number of possible color tones. This means that an 8-bit sensor can display 28 * 28 * 28 colors. That’s over 16 million shades!

Thus, a 10-bit camera can display more than 1 billion colors, a 12-bit camera 68 billion colors, and a 14-bit camera even more than 4 billion color combinations.

Summary:

Many users are not fully aware of how bit rate influences video quality.
People usually see numbers next to the name of the format (Mp4, MOV, AVI) and do not know exactly what it is.

Here we have tried to explain that the higher the bit rate, the more colors.
Perhaps you think that speaking of so many millions of colors, and it is enough, but it is not like that. Actually reality has a practically infinite number of color gamut, so to capture it with realism, it is necessary to have as many colors as possible.