Function: venc_get_channel_desc_param

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

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

Obtains the description of a video encoding channel.

The Atlas Training Series Product does not support this API.

venc_channel_desc: int, pointer address of the description of a video encoding channel.

param_type: int, attribute parameter type. For details, see aclvencChannelDescParamType.

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 indicates success.
• Other values indicate failure.