venc_set_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

Sets the parameters of a channel.

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_set_chn_param(hi_venc_chn chn, const hi_venc_chn_param *chn_param);

Python Function

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

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

Return Value Description

Return Value	Description
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