Datavideo HS-1300 Instruction Manual page 54

Profile
Profile sets the H.264 encoding profile for your stream. The available
options are Baseline, Main, and High. Typically, High profile provides the
best image quality and is suitable in most instances. However, depending
on the decoder used when viewing the stream, such as with mobiles
devices, a Main or Baseline profile may be required.
Video Bitrate (bps)
The bitrate of the video specifies the amount of information stored in the
video. The higher the bitrate is, the clearer the video is. However, when
choosing your encoding settings for streaming, you should first check
your available upload bandwidth. A good rule of thumb is for the bitrate
of your stream to use no more than 50% of your available upload
bandwidth capacity on a DEDICATED line. For example, if the result you
get from a speed test shows that you have 2Mbps of upload speed
available, your combined audio and video bitrate should not exceed
1Mbps.
Usually high bitrate means good image quality; however, there are also
exceptions. For example, SD video may appear acceptable at 1000 Kbps
(1M) but HD video is unacceptable at 1000 Kbps. Therefore we
recommend the following settings for your video bitrate:
 When NVS-31 is in record-only mode, the recommended video
bitrate is 16 Mbps.
 When NVS-31 is in stream-only mode, the recommended video
bitrate is 10 Mbps.
 When NVS-31 streams and records simultaneously, sum of the
stream and record video bitrates should not exceed 12Mbps.
Audio Bitrate (bps)
The NVS-31 offers the user the following audio bitrates at which you may
want to stream the audio. It is recommended to select 128Kbps or
higher.
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