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frame, such as Sony A7S II, then write the timecode into SEI message. SDI
supports to write system timecode or SMPTE RP-188 timecode (if present in
the input signal) into SEI message.
Closed caption SEI message: turn on the switch to encode closed captions
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(if present in the input signal) into H.264/H.265 (HEVC) SEI message. Native
CEA-608 and 608 over 708 captions are both supported. It is off by default.
Note that it is only supported by SDI product.
Set Sub Stream
Output: by default, it is 1280x720p30 at 1Mbps.
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Encoding profile: sub stream uses H.264 encoder. The profiles can be High
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profile, Main profile and Baseline.
Quantization range: options are Full range(0-255), Limited range(16-235)
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Keyframe interval: options are 1, 2, 5, 10, 30, 60sec. A less number will
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result in a larger file size and less buffer time for seeing the first frame.
Bit rate stats duration: adjust bit rate by image complexity to ensure the
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stability of the code stream within the set period. The default value is
recommended. A smaller value means more information may need to be
discarded when the image data bursts.
Time code SEI message: turn on the function to get A/V sync between
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multiple devices which support this SEI message as well. It is off by default.
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