Configuring Transcoder Parameters
Transcoder Settings include the Encoder (processor), Format (video compression standard), Video Bitrate and Resolution, KLV Metadata pass-through, Frame Rate, GOP size, Audio Bitrate, Stream Shaping, and Output Pacing. Optional advanced settings are available to fine-tune Stream Shaping. The parameters vary depending on the Encoder and Format selected.
Note
If the Resolution fields are left blank or unchanged in the Transcoders section, the resolution of the source stream will remain intact in the outbound stream. However, the GOP Size and Bitrate are set to a default value based on the resolution.
KLV Options
With KLV (Key Length Value) input, you can also configure the transcoder to reduce the KLV data rate by frame-decimating the KLV metadata and/or filtering out data fields from MISB 0601 UAS KLV metadata. This is useful to lower the amount of bandwidth consumed by metadata and thereby allow higher video bitrates within bandwidth-constrained ISR workflows.
- KLV Rate Decimation causes Kraken to ingest KLV metadata at one KLV frame rate and decimate it to another rate. You select the factor (1:N, N=1..60), and then (N-1/N) metadata frames are dropped and only 1/N frames are passed through to the Output Stream. (See "KLV Decimation" under Transcoder Settings)
- KLV Tag Filtering filters out selected data fields from MISB 0601 UAS KLV metadata. You select either a 0601 minimum UAS metadata set or a 0601 minimum security set, or you can define a custom set by removing tags for fields deemed not relevant to your operation. (See Filtering UAS KLV Metadata Tags)
Note
KLV metadata insertion and KLV decimation/filtering are mutually exclusive. If metadata insertion is specified, it will override KLV tag filtering.
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