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# Channels Configuration Parameters

The parameters in this section configure the number of processing channels Media Server requests from your License Server. You might want to restrict the number of processing channels if you have multiple Media Servers.

Channel Type | Permitted Operations | Allocating Channels
--- | --- | ---
VisualChannels | Ingesting records from another Media Server for further processing. Barcode recognition Face recognition on large databases (maximum 250,000 faces, every additional 250,000 faces requires an additional visual channel). Image classification Image comparison Optical Character Recognition (OCR) Object detection Object recognition A visual channel also includes all surveillance features, and all video management features. The only operations not included in a visual channel are those for audio processing. | Allocate one channel for each concurrent `process` action that includes any of these operations. For example, to run OCR and object recognition on one video stream, set `VisualChannels=1`.
SurveillanceChannels | Face detection Number plate recognition (ANPR) Scene analysis Text detection The following features are included if they are used with face detection, ANPR, scene analysis, or text detection: Clothing analysis Color clustering Face recognition on standard databases (maximum 250 faces, every additional 250 faces requires an additional surveillance channel). Face demographics Face state analysis Vehicle make/model analysis A surveillance channel also includes all video management features. | Allocate one channel for each analysis task, multiplied by the number of concurrent `process` actions. For example, to run number plate recognition and scene analysis on the video from two cameras set `SurveillanceChannels=4`. To run face detection and face recognition on the video from one camera (with a database of up to 250 faces), you can set `SurveillanceChannels=1`, because face recognition is included in the surveillance pack when face detection is used.
AudioChannels | Audio matching Language identification Speaker identification Speech-to-text An audio channel also includes all video management features. | Allocate one channel for each concurrent `process` action that includes audio processing. For example, if you want to run object recognition, language identification, and speech-to-text on one video stream, set `VisualChannels=1` and `AudioChannels=1`.
VideoManagementChannels | Ingest (apart from the Receive ingest engine, which requires a visual channel). Analysis: Keyframe News segmentation Text segmentation Encoding Event stream processing Transformation Output | Allocate one video management channel for each concurrent `process` action that is not allocated a visual, surveillance, or audio channel. Visual, surveillance, and audio channels all include these operations, so you do not need to allocate a video management channel for any action that is already allocated another type of channel.

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