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iDS-2CD7xxG0-xxxxx Network Bullet Camera User Manual
UM iDS-2CD7xxG0-xxxxx 021021NA 21
• Video: Only video content is contained in the stream.
• Video & Audio: Video content and audio content are contained in the composite stream.
Resolution
Select video resolution according to actual needs. Higher resolution requires more bandwidth and storage.
Bitrate Type and Max. Bitrate
• Constant Bitrate: The stream is compressed and transmitted at a comparatively fixed bitrate. The
compression speed is fast, but mosaic may occur on the image.
• Variable Bitrate: The device automatically adjusts the bitrate under the set Max. Bitrate. The
compression speed is slower than that of the constant bitrate, but it guarantees the image quality of
complex scenes.
Video Quality
When Bitrate Type is set as Variable, video quality is configurable. Select a video quality according to
actual needs. Note that higher video quality requires higher bandwidth.
Frame Rate
Frame rate is the frequency the video stream is updated and is measured in frames per second (fps).
A higher frame rate is advantageous when there is movement in the video stream, as it maintains image
quality throughout. Note that higher frame rates require higher bandwidth and larger storage space.
Video Encoding
The compression standard the device uses for video encoding.
Available compression standards vary by model.
• H.264: H.264, also known as MPEG-4 Part 10, Advanced Video Coding, is a compression standard.
Without compressing image quality, it increases compression ratio and reduces the size of video files
more than MJPEG or MPEG-4 Part 2.
• H.264+: H.264+ is an improved compression coding technology based on H.264. By enabling H.264+,
you can estimate the HDD consumption by its maximum average bitrate. Compared to H.264, H.264+
reduces storage by up to 50% with the same maximum bitrate in most scenes.
When H.264+ is enabled, Max. Average Bitrate is configurable. The device gives a recommended max.
average bitrate by default. You can adjust the parameter to a higher value if the video quality is less
satisfactory. Max. average bitrate should not be higher than max. bitrate.
When H.264+ is enabled, Video Quality, I Frame Interval, Profile and SVC are not configurable.
• H.265: H.265, also known as High Efficiency Video Coding (HEVC) and MPEG-H Part 2, is a compression
standard. In comparison to H.264, it offers better video compression at the same resolution, frame rate
and image quality.
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