Axis M20 Series User Manual

Also see for AXIS M20 Series: Installation guide

AXIS M20 Bullet Camera SeriesLearn morePrivacy masksA privacy mask is a user-defined area that prevents users from viewing a part of the monitored area. In the video stream, privacymasks appear as blocks of solid color.You’ll see the privacy mask on all snapshots, recorded video, and live streams.You can use the VAPIX® application programming interface (API) to turn off the privacy masks.ImportantIf you use multiple privacy masks it may affect the product’s performance.OverlaysOverlays are superimposed over the video stream. They are used to provide extra information during recordings, such as a timestamp,or during product installation and configuration. You can add either text or an image.Pan, tilt, and zoom (PTZ)Guard toursA guard tour displays the video stream from different preset positions either in a predetermined or random order, and for configurableperiods of time. Once started, a guard tour continues to run until stopped, even when there are no clients (web browsers) viewing theimages.Streaming and storageVideo compression formatsDecide which compression method to use based on your viewing requirements, and on the properties of your network. Theavailable options are:Motion JPEGMotion JPEG, or MJPEG, is a digital video sequence that is made up of a series of individual JPEG images. These images are thendisplayed and updated at a rate sufficient to create a stream that shows constantly updated motion. For the viewer to perceive motionvideo the rate must be at least 16 image frames per second. Full motion video is perceived at 30 (NTSC) or 25 (PAL) frames per second.The Motion JPEG stream uses considerable amounts of bandwidth, but provides excellent image quality and access to every imagecontained in the stream.H.264 or MPEG-4 Part 10/AVCNoteH.264 is a licensed technology. The Axis product includes one H.264 viewing client license. To install additional unlicensedcopies of the client is prohibited. To purchase additional licenses, contact your Axis reseller.H.264 can, without compromising image quality, reduce the size of a digital video file by more than 80% compared to the MotionJPEG format and by as much as 50% compared to older MPEG formats. This means that less network bandwidth and storage spaceare required for a video file. Or seen another way, higher video quality can be achieved for a given bitrate.H.265 or MPEG-H Part 2/HEVCH.265 can, without compromising image quality, reduce the size of a digital video file by more than 25% compared to H.264.39