Compression of the video is the act of utilizing a codec that goes through the video files to compress or get rid of files that are not needed. What do you need it for? The process will make your video files smaller, in order to store as many videos as you can on your MicroSD card or hard drive.
Pretty much all surveillance cameras already come nowadays with this feature built-in. The types of compression include MJPEG, H.264 and MPEG 4 which is basically an older version.
How Do You Benefit From Video Compression
Compression of your videos is an incredible tool for the situations when the storage and bandwidth limitations are typical for your video surveillance system. The reason being is that files that contain videos can be very large if they are lengthy clips or you have been recording in megapixel resolution. Although if you are compressing your video too much, the quality of the image also might be jeopardised—so you really have to find that balance of the image quality and compression.
Compressing your video files makes it easier for the surveillance system even to transfer the files to your network and helps to avoid any kind of delays as it prevents the system from slowing down. This feature is extremely important if you mostly view the recordings on a tablet or smartphone.
Another advantage is that the files that have been compressed also occupy less space on your hard drive, which allows you to keep more videos and increase the time of keeping them there.
Mobotix, Axis, Optica and many other manufacturers produce the IP security cameras and video surveillance systems that boast a built-in codec for the video compression.
How Does It Work?
In order to compress the video files, the codec is searching for unnecessary frames or files that it can eliminate or reduce without making a huge impact on the final version of the video. Your surveillance camera does this process automatically, but you can usually choose what type of video compression you prefer to utilize. You can also set the compression level within the video:
● MPEG4 compression – more outdated type of compressing your videos, which has been replaced by H.264 for the most part
● MJPEG compression – which is also known as motion JPEG, it works evaluates each video frame, compresses them, and sends in an individual JPEG images format
● H.264 compression – the newest style of video compression, which is considered to be the most efficient codec for the video compression nowadays. What it does is it takes little groups of video frames and evaluates them altogether as a series to eliminate duplicate content that comes up in each frame without changing
If your video surveillance system also records and audio, your recorded files are going to be compressed separately.
In the situations when you have multiple video streams in your camera, you might be able to use different compression levels or multiple video compression codecs. It will let you to set up one stream for viewing on your mobile device, another stream for viewing live, and one more stream for long-term storage.