As the surveillance market is moving from analog cameras to IP cameras, video compression and video storage have become important features to consider when buying security camera. In analog security cameras, video compression is performed inside the digital video recorder (DVR) at a central location. In IP network cameras, video compression is performed inside the camera itself. Video compression technology in security cameras compresses the raw images, videos and files into a smaller format, thus making it easier for you to store more data on the hard drive or storage device. There are three types of video compression technology available in security cameras:
- H.264 codec: This is the most efficient and recent standard for video compression. A camera with H.264 codec uses significantly less storage space to store videos and transmits video at much faster frame rates.
- MJPEG compression: It is an example of frame-by-frame compression technology format. Cameras having MJPEG technology takes full picture of each frame, compresses them and sends them as an individual JPEG image.
- MPEG4 compression: This is the oldest format of video compression. MPEG-4 compression is limited to VGA resolutions and so it is not commonly used in higher resolution surveillance cameras.
These three video compression modes can record up to 30 frames per second (FPS). However, the surveillance market is looking for cameras with video compression mode that provides both faster frame rates and higher resolution videos. Though all compression modes have their own features but H.264 codec will help you make great savings in terms of storage requirements and bandwidth usage.