hi_mpi_venc_send_frame_ex

Applicability

Product	Supported
Atlas 350 Accelerator Card	☓
Atlas A3 training product/Atlas A3 inference product	☓
Atlas A2 training product/Atlas A2 inference product	☓
Atlas 200I/500 A2 inference product	☓
Atlas inference product	√
Atlas training product	☓

Function Description

Sends source images and their QpMap table information for encoding through an H.264/H.265 encoding channel.

Prototype

hi_s32 hi_mpi_venc_send_frame_ex(hi_venc_chn chn, const hi_user_frame_info *frame, hi_s32 milli_sec)

Parameters

Parameter	Input/Output	Description
chn	Input	Encoding channel ID. For the Atlas inference product, the value range of the encoding channel ID is [0, 256). The JPEGE and VENC functions share channels. The maximum number of channels is 256.
frame	Input	Pointer to the source image information.
milli_sec	Input	Timeout interval (ms). -1: blocking mode. 0: non-blocking mode. > 0: timeout interval (timeout mode). The timeout interval varies with the operating system. The deviation is generally within a time slice of an operating system. For example, if the time slice of an operating system is 4 ms and the value of milli_sec is set to 1, the actual timeout interval ranges from 1 ms to 5 ms. When the CPU load is high, the timeout interval may fluctuate.

Parameter

Input/Output

Description

chn

Input

Encoding channel ID.

For the Atlas inference product, the value range of the encoding channel ID is [0, 256). The JPEGE and VENC functions share channels. The maximum number of channels is 256.

frame

Input

Pointer to the source image information.

milli_sec

Input

Timeout interval (ms).

-1: blocking mode.
0: non-blocking mode.
> 0: timeout interval (timeout mode). The timeout interval varies with the operating system. The deviation is generally within a time slice of an operating system. For example, if the time slice of an operating system is 4 ms and the value of milli_sec is set to 1, the actual timeout interval ranges from 1 ms to 5 ms. When the CPU load is high, the timeout interval may fluctuate.

Returns

0: success
Other values: failure. For details, see VENC/JPEGE Return Codes.

Restrictions

Only H.264/H.265 encoding channels support this API.
The size of the original image in the VI channel must be the same as that of the encoding channel.
The encoding channel passed to the API call must have been created and started to receive images.
During encoding, the input memory can be released only after the hi_mpi_venc_get_stream interface is called to obtain the result.
For details about the restrictions on video encoding input and output, see VENC Functions and Restrictions.

Parent topic: Video Encoding (VENC) and JPEG Encoder (JPEGE)