venc_get_chn_param

Applicability

Product	Supported (√/x)
Atlas A3 training products/Atlas A3 inference products	x
Atlas A2 training products/Atlas A2 inference products	x
Atlas training products	x
Atlas inference products	√
Atlas 200I/500 A2 inference products	√

Function Usage

Obtains channel parameters.

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

Prototype

C Prototype

hi_s32 hi_mpi_venc_get_chn_param(hi_venc_chn chn, hi_venc_chn_param *chn_param);

Python Function

chn_param, ret = acl.himpi.venc_get_chn_param(chn)

Parameter Description

Parameter	Description
chn	Int, encoding channel ID. 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. 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.

Parameter

Description

chn

Int, encoding channel ID.

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.
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.

Return Value Description

Return Value	Description
chn_param	Dict, VENC channel parameter. For details, see hi_venc_chn_param.
ret	Int, error code. 0: success. Other values: failures. For details, see VENC/JPEGE Return Codes.

Return Value

Description

chn_param

Dict, VENC channel parameter. For details, see hi_venc_chn_param.

ret

Int, error code.

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

Restrictions

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.

Parent topic: VENC/JPEGE APIs