Documentation

aclvencChannelDescParamType

The Atlas Training Series Product does not support this enumeration.

VENC Channel Attribute Type

Description

ACL_VENC_THREAD_ID_UINT64 = 0

Callback thread ID.

NOTE:

Do not pass the same thread ID for subscribing to VENC callback functions on different devices in the same process.

ACL_VENC_CALLBACK_PTR = 1

Callback function.

ACL_VENC_PIXEL_FORMAT_UINT32 = 2

Image format.

  • PIXEL_FORMAT_YUV_SEMIPLANAR_420
  • PIXEL_FORMAT_YVU_SEMIPLANAR_420

ACL_VENC_ENCODE_TYPE_UINT32 = 3

Video coding protocol.

For details, see acldvppStreamFormat.

ACL_VENC_PIC_WIDTH_UINT32 = 4

Input image width.

ACL_VENC_PIC_HEIGHT_UINT32 = 5

Input image height.

ACL_VENC_KEY_FRAME_INTERVAL_UINT32 = 6

Key frame interval. Must be in the range of [1, 65536].

ACL_VENC_BUF_ADDR_PTR = 7
Pointer address of the encoding output buffer.
NOTE:

For the Atlas 200/300/500 Inference Product, this parameter is not configurable in the current version. VENC manages the buffer address internally.

ACL_VENC_BUF_SIZE_UINT32 = 8
Size of the encoding output buffer, in bytes.
NOTE:

For the Atlas 200/300/500 Inference Product, it is not allowed to set this parameter in the current version. It defaults to 3686400Bytes.

Atlas 200/300/500 inference product. In earlier versions, the value of this parameter is invalid and cannot be obtained.

ACL_VENC_RC_MODE_UINT32 = 9
Bit rate control mode.
  • 1: variable bit rate (VBR) mode
  • 2: constant bit rate (CBR) mode
NOTE:

If this attribute is not set, the default value 0 is used.

For the Atlas 200/300/500 Inference Product, the default value 0 indicates the CBR mode.

ACL_VENC_SRC_RATE_UINT32 = 10

Frame rate of the input stream (FPS).

For the Atlas 200/300/500 Inference Product, the value is 0 or in the range of [1, 120].

If it is not set or set to 0, the default value 30 is used. If the difference between the value of this parameter and the actual frame rate of the input stream is too large, the output bit rate is affected.

ACL_VENC_MAX_BITRATE_UINT32 = 11

Output bit rate (kbit/s).

For the Atlas 200/300/500 Inference Product, the value is 0 or in the range of [10, 30000]. The default value is 300. If it is set to 0, the default value 300 is used.

ACL_VENC_MAX_IP_PROP_UINT32 = 12

I-frame to P-frame bit allocation ratio within a GOP. Must be 0 or within the range of [1, 100]. The default value is 80 in VBR mode or 70 in CBR mode. If it is set to 0, the default value is used.