venc_get_roi_attr

Product	Supported
Ascend 950PR/Ascend 950DT	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	√

Obtains the ROI attributes of an H.264/H.265 channel. For details about the ROI encoding function, see ROI Encoding Function.

C Prototype

hi_s32 hi_mpi_venc_get_roi_attr(hi_venc_chn chn, hi_u32 idx, hi_venc_roi_attr *roi_attr)

Python Function

roi_attr, ret = acl.himpi.venc_get_roi_attr(chn, idx)

Parameter	Description
chn	Int, encoding channel ID. Atlas inference products: The value range of this parameter 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 this parameter is [0, 128). The JPEGE and VENC functions share the same channels, and the maximum number of channels is 128.
idx	Int, index of the ROI for an H.264/H.265 encoding channel.

Return Value	Description
roi_attr	Dict, ROI parameter dictionary. See hi_venc_roi_attr.
ret	Int, error code. 0: success. Other values: failures. For details, see VENC/JPEGE Return Codes.

Description

roi_attr

Dict, ROI parameter dictionary. See hi_venc_roi_attr.

ret

Int, error code.

This API is used to obtain the configuration of an ROI with a specified index in an H.264/H.265 encoding channel.

This API must be called after an encoding channel is created and before the channel is destroyed.

It is recommended that this API be called after an encoding channel is created and before encoding is started, to reduce the number of the API calls during encoding.

Parent topic: VENC/JPEGE APIs