Network cameras capture video footage by using an image sensor, typically a CMOS or CCD sensor, to convert light into electrical signals. This sensor captures individual frames of video at a specific frame rate, typically 30 frames per second. The captured video footage is then processed by the camera's internal processing unit, which compresses the video data using codecs such as H.264 or MJPEG to reduce file size and bandwidth requirements.
Once the video footage is compressed, it is transmitted over the network using protocols such as TCP/IP or UDP. The network camera typically has an Ethernet port that connects to a local area network (LAN) or the internet, allowing the video footage to be accessed remotely from a computer or mobile device.
The captured and compressed video footage is stored on a network video recorder (NVR) or a network-attached storage (NAS) device. The NVR or NAS device provides centralized storage for the video footage, allowing for easy access and playback. Additionally, some network cameras have built-in storage options such as SD cards or onboard storage, which can be used as a backup in case of network connectivity issues.
Overall, network cameras capture and store video footage by leveraging image sensors, compression technology, network connectivity, and external storage devices to provide high-quality, reliable video surveillance solutions.