Real-Time Transcoder Parameters

The following table lists the Real-Time Transcoder parameters:

Basic Parameters

Transcoder Setting	Description/Values
Hublet Name	Enter a unique name for the Hublet. This name will be selectable from the list of Hublets when you define a stream.
Encoder Preset Name	Enter a unique name for the preset.

Encoding Parameters

Transcoder Setting	Description/Values
Video Bitrate	Type in the Video Bitrate in kbps for the outbound stream, for example, 1024. Range = `150..20000`
Resolution Mode	Select the resolution for the outbound stream: Custom: Type in a horizontal and vertical (W x H) resolution, for example, 1280x720. Auto (Detect Continuously) (default) Auto (Detect on Stream Start) Note To maintain the resolution of the outbound stream that was detected at stream start (even if the input resolution changes), select “Auto (Detect on Stream Start)”. 720x576 or lower is considered SD resolution.
Width	Type in the width (in pixels) for the outbound stream.
Height	Select the height (in pixels) for the outbound stream, either: 1080, 720, 540, 480
Video Codec	Select the video compression standard for the outbound stream, either: HEVC (H.265) H.264 (AVC) (default)
Output FPS	Select the coded picture frame rate per second (fps): Auto (Detect Continuously) (default) Auto (Detect on Stream Start) Select a frame rate from the list: 60..1 Note "Auto (Detect on Stream Start)" does a one-time early detection of the input frame rate and uses that as the fixed output frame rate for the transcoder. "Auto (Detect Continuously)" is an additional encoding/transcoding mode where the output Frame Rate follows the source frame rate. This mode monitors the incoming frame rate and if it can detect a steady frame rate that differs from the one it is currently using, it resets the video encoder and configures it accordingly.
Video Framing	Select the number of B-frames and B reference frames per P-Frames to allow in the output stream: Auto (default): The Kraken software decides how many B-Frames and B reference frames to allow IP: I and P frames only (lowest delay; lowest quality) IBP: I, B and P frames IBBP: I, BB (two B-frames and B reference frames in sequence) and P frames (higher delay; higher quality) IBBBP: I, BBB (three B-frames and B reference frames in sequence) and P frames (highest delay; highest quality) Note B-Frames improve the quality by increasing the efficiency of the encoding, thus allowing higher quality at the same bitrate. But B-Frames increase the encoder processing overhead, e.g., higher CPU utilization of the encoder.
GOP Size	Type in the GOP (Group of Pictures) Size for the outbound stream, for example, 30. Range = `0..1000` Note You may choose to adjust the GOP to get different video quality on the outbound stream or to make the stream compatible with a different system than the original stream was intended for. Tip Increasing the GOP size can increase the time required for a player to tune into the stream. Reasonable GOP sizes tend to range from half the frame rate to up to 5 times the frame rate. A GOP size equal to the output frame rate is a good rule of thumb.
Audio Bitrate	Type in the Audio Bitrate in kbps for the outbound stream, for example, 128. Range = 14..576 Kbps
Audio Enabled	Check this checkbox to enable audio on the outbound stream. Note When audio is removed on the outbound stream, the PID for the audio track is removed, as is the reference to it in the PMT.
KLV Metadata	Check this checkbox to enable KLV metadata passthrough.