Function: venc_get_channel_desc_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 the description of a video encoding channel.

Atlas training products: This API is not supported.

Atlas A2 training products/Atlas A2 inference products: This API is not supported.

Atlas A3 training products/Atlas A3 inference products: This API is not supported.

Prototype

C Prototype

aclError aclvencGetChannelDescParam(const aclvencChannelDesc *channelDesc, aclvencChannelDescParamType paramType, size_t length, size_t *paramRetSize, void *param)

Python Function

attr, ret = acl.media.venc_get_channel_desc_param(venc_channel_desc, param_type)

Parameter Description

Parameter	Description
venc_channel_desc	Int, pointer address of the description of a video encoding channel.
param_type	Int, attribute parameter type. For details, see aclvencChannelDescParamType.

Return Value Description

Return Value	Description
attr	Attribute value. If the type of the attribute parameter is uint64_t or uint32_t, the value is the corresponding attribute value. If the attribute parameter is of the callback function type, the value is a Python function object, which encodes the callback function. Callback function format in Python: def venc_call_back_func(dvpp_pic_desc, dvpp_stream_desc, user_data): pass If the type of the attribute parameter is pointer, the value is the address to which the pointer points.
ret	Int, error code: 0 on success; else, failure.

Return Value

Description

attr

Attribute value.

If the type of the attribute parameter is uint64_t or uint32_t, the value is the corresponding attribute value.
If the attribute parameter is of the callback function type, the value is a Python function object, which encodes the callback function.
Callback function format in Python:
```
def venc_call_back_func(dvpp_pic_desc, dvpp_stream_desc, user_data):
pass
```
If the type of the attribute parameter is pointer, the value is the address to which the pointer points.

ret

Int, error code: 0 on success; else, failure.

Parent topic: VENC