hi_mpi_venc_get_chn_param

Applicability

Product	Supported
Atlas A3 training products/Atlas A3 inference products	☓
Atlas A2 training products/Atlas A2 inference products	☓
Atlas 200I/500 A2 inference products	√
Atlas inference products	√
Atlas training products	☓

Description

Obtains channel parameters.

Call this API after an encoding channel is created and before the channel is destroyed. Passing a non-existing channel ID to this API returns a failure.

Prototype

hi_s32 hi_mpi_venc_get_chn_param (hi_venc_chn chn, hi_venc_chn_param *chn_param)

Parameters

Parameter	Input/Output	Description
chn	Input	Encoding channel ID. Atlas 200I/500 A2 inference products: The value range of the encoding channel ID is [0, 128). The JPEGE and VENC functions share the same channels, and the maximum number of channels is 128. Atlas inference products: The value range of the encoding channel ID is [0, 256). The JPEGE and VENC functions share the same channels, and the maximum number of channels is 256.
chn_param	Output	Pointer to the VENC channel parameters.

Parameter

Input/Output

Description

chn

Input

Encoding channel ID.

Atlas 200I/500 A2 inference products: The value range of the encoding channel ID is [0, 128). The JPEGE and VENC functions share the same channels, and the maximum number of channels is 128.

Atlas inference products: The value range of the encoding channel ID is [0, 256). The JPEGE and VENC functions share the same channels, and the maximum number of channels is 256.

chn_param

Output

Pointer to the VENC channel parameters.

Returns

0: success
Other values: failure. For details, see VENC/JPEGE Return Codes.

Restrictions

The Atlas 200I/500 A2 inference products does not support this API for JPEGE image encoding.

Parent topic: Video Encoding (VENC) and JPEG Encoder (JPEGE)