Datavideo SHOWCAST 100 4K Switcher with Built-In Streaming Encoder - Manual (Page 59)

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If your available bandwidth is limited, you should reduce both your resolution and your bitrate
accordingly. 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.
Resolution
The first step of encoder setup is to adjust the image size. It is best to either match your original video
source or scale it down. For example, capture at HD 720 and stream at HD 720. Or capture at HD 720
and stream at 540 (high).
You should never be scaling up and streaming at a higher resolution than your original video source.
For example, it does not make sense to capture at 720 and stream at 1080. Note that you will also have
no gain in quality and you are using more bandwidth than is necessary for your viewers.
You should also be aware that higher resolutions require greater processing power to encode the
stream. Attempting too high of a resolution on too little processing power can result in degraded
image quality and corrupted or interrupted streams or recordings.
Resolutions available for your stream encoder are listed as follows:

1080x1920

720x1280

576x720

480x720

480x640

240x320
Frame Rate
Select a frame rate from the drop-down menu for video streaming. Note that frame rates should always
match the frame rate of the video source.

60.00

59.94

50.00

30.00

29.97

25.00

20.00

15.00
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.

High