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hi_mpi_vo_enable_chn

The Atlas 200/300/500 Inference Product does not support this API.

The Atlas Training Series Product does not support this API.

Description

Enables a specified VO channel.

Restrictions

  • Before calling this API, ensure that the video layer is bound. Otherwise, a failure is returned.
  • Before calling this API, enable the video layer of the corresponding device.
  • Before enabling a channel, configure this channel. Otherwise, an error is returned, indicating that the channel is not configured.
  • A VO channel can be enabled repeatedly, and no failure is returned.
  • Currently, this API does not support multiple processes.

Prototype

hi_s32 hi_mpi_vo_enable_chn(hi_vo_layer layer, hi_vo_chn chn)

Parameters

Parameter

Input/Output

Description

layer

Input

Video layer ID.

Value range: [0, 9)

Graphics layers and cascade video layers are not supported.

chn

Input

VO channel ID.

Value range: [0, 64)

Returns

Parent topic: VO