Do you want to increase your video quality? Well, who would say no to this?
A term “Bitrate” has possibly come across you once in a while at some time of exporting your video. Remember? However, there is nothing to worry about it. We are going to clarify all your whys and wherefores regarding Video Bitrate in this article.
As a matter of fact, there is a substantial association between video quality and video bitrate. Read on to get the answers to all those questions currently arising in your mind.
Get to Know What Actually Video Bitrate is?
The number of bits whose processing is done in a certain amount of time is what is called video bitrate. In other words, the number of bits in one second is referred to as video bitrate.
Symbol: It is symbolized as bit/s.
Units: Common units of bitrate are inclusive of the following:
So, What Does Video Bitrate Do?
In general, it serves the purpose of determining the quality as well as the size of audio and video files. In fact, a higher bitrate indicates better quality and the bigger size of the file. Wondering why? This is simply because File size equals to bitrate x duration.
Get Better Image Quality with High Video Bitrate:
On the whole, the quality of an image becomes better with a higher bitrate. Because of this, a high-quality image appears in the video output. Nonetheless, it's true only when you compare the same video having the corresponding resolution.
Whenever the resolution increases, bitrates must also be increased. This is the reason that more data is required for processing for higher resolution videos. For that reason, high bitrate of a video potentially offers the best quality. However, odds are that it puts a considerable strain on your hardware, as a result of which stutters can take place.
Typical Range of Bitrates for Different Quality Videos:
Keep in mind that 1 byte is made up of 8 bits. Over and above that, the data rates of video are provided in bits/s. For a video content running at 1 Mbps, 8 megabits/second or 8 Mbps would be the provided bitrate of a data rate specification.
Here, we are going to tell bitrates for videos of different quality. With this respect, the typical range of bitrate is 20 Mbps for an HD Blu-ray video. While its 6 Mbps for a standard-definition DVD usually. As far as the bitrate of high-quality web video is concerned, it is usually provided in kilobits (kb/s).
Selection of the Optimum Bitrate:
Considering the type of device on which your video will be played is important for selecting optimum bitrate for the workflow of your video.
Now, as you understand the idea that the bitrate is varying depending on HD Blu-ray video, phone video, an internet video, etc. Hence, you need to consider the platform on which your video will be run before choosing your optimum bitrate.
Actually, the determination of a certain platform for playing your video is vital. Pondering over the reason? This is because doing so enables you to incorporate certain video encoding API for applying Variable bitrate to your media files. Didn’t know about Variable bitrate before? Let’s get to know about it below.
Going In-depth: What is Variable Bit Rate (VBR) and Constant Bit Rate (CBR)?
You will find a bit rate encoding of two types which are as follows:
Constant Bit Rate (CBR):
How annoying is it to wait for a video which takes more time to load, as nobody wants to wait for longer, right? This is where CBR serves aptly. In fact, it is there for maintaining a set bit rate all through the whole video. By doing so, it allows the video to play back easily and load quickly too.
Uses of CBR:
Thinking of where to make the best use of it? Usually, cloud-based streaming services use it because their videos require constant downloading. As well as that, their videos are also prone to stuttering due to the spikes in bitrate making the use of CBR favorable.
Since there occurs multiplexing of numerous channels into a single transport stream having a restricted bandwidth in satellite television broadcasts CBR can also be used there.
Limitations of CBR:
Unluckily, CBR has some limitations for certain output formats in particular for segments of complex video as it will create a larger file size.
Often, it's not an appropriate option to stream as the allocation of data takes place inadequately for complex segments with CBR. As a result, you get overall lower quality video as well as unused size on the uncomplex segments. For that reason, the recommendation is to not to use CBR except for having a particular requirement.
Variable Bit Rate (VBR):
It is featuring a dynamic bit rate that alters on the basis of detail’s level required in a provided moment (moments of motion usually).
Universally, VBR is less simple to playback. Having a very smaller file size, VBR offers a significantly higher quality of video in comparison to what CBR provides.
For making the best use of VBR, use it for direct and progressive downloads. What’s more? Spikes in VBR bit rate occurs only when there is a need of it.
To the media file’s more complex segments, it apportions a higher bitrate. On the other hand, the allocation of lower bitrates happens via VBR to the simple segments. This is actually the main benefit of VBR encoding.
For the file, what provides the average bitrate is increasing the bitrates and distributing as per the duration. This average bitrate is positively comparable with the corresponding bitrate of CBR.
For most content, VBR creates higher quality visual, though its encoding needs more time for processing.
Summing It Up:
Largely, it depends on individual circumstances to which of these to use. For the most part, you can make use of them to fulfill the purposes stated above.