Overlays; Streaming And Storage - Axis Q16 Series User Manual

AXIS Q16 Network Camera Series
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You'll see the privacy mask on all snapshots, recorded video, and live streams.
You can use the VAPIX® application programming interface (API) to hide the privacy masks.
Important
If you use multiple privacy masks it may affect the product's performance.
You can create several privacy masks. The maximum number of masks depends on the complexity of all the masks combined. The
more anchor points in each mask, the fewer masks you can create. Each mask can have 3 to 10 anchor points.
Important
Set the zoom and focus before you create a privacy mask.

Overlays

Overlays 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.

Streaming and storage

Video compression formats
Decide which compression method to use based on your viewing requirements, and on the properties of your network. The
available options are:
Motion JPEG
Motion JPEG, or MJPEG, is a digital video sequence that is made up of a series of individual JPEG images. These images are then
displayed and updated at a rate sufficient to create a stream that shows constantly updated motion. For the viewer to perceive motion
video 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 image
contained in the stream.
H.264 or MPEG-4 Part 10/AVC
Note
H.264 is a licensed technology. The Axis product includes one H.264 viewing client license. To install additional unlicensed
copies 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 Motion
JPEG format and by as much as 50% compared to older MPEG formats. This means that less network bandwidth and storage space
are required for a video file. Or seen another way, higher video quality can be achieved for a given bitrate.
How do Image, Stream, and Stream profile settings relate to each other?
The Image tab contains camera settings that affect all video streams from the product. If you change something in this tab, it
immediately affects all video streams and recordings.
The Stream tab contains settings for video streams. You get these settings if you request a video stream from the product and don't
specify for example resolution, or frame rate. When you change the settings in the Stream tab, it doesn't affect ongoing streams, but
it will take effect when you start a new stream.
The Stream profiles settings override the settings from the Stream tab. If you request a stream with a specific stream profile, the
stream contains the settings of that profile. If you request a stream without specifying a stream profile, or request a stream profile
that doesn't exist in the product, the stream contains the settings from the Stream tab.
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