hi_mpi_vo_send_frame

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	☓

Sends video images to a specified output channel for display.

hi_s32 hi_mpi_vo_send_frame(hi_vo_layer layer, hi_vo_chn chn, const hi_video_frame_info *frame_info, hi_s32 milli_sec)

Parameter	Input/Output	Description
layer	Input	VO layer ID. Value range: [0, 9) Graphics layers and cascade video layers are not supported.
chn	Input	VO channel ID. Value range: [0, 64)
frame_info	Input	Pointer to video data information. In single mode, the width and height of the picture read by the user cannot be greater than those of the target channel.
milli_sec	Input	Timeout parameter. Value options are as follows (only 0 is supported): -1: The block mode is used until pictures are transmitted. 0: non-blocking mode > 0: timeout interval, in milliseconds. If a timeout occurs, the waiting stops.

Before calling this API, ensure that the channel is enabled.
The input video data information must comply with the VO data. The configured width and height must be consistent with those of the actual image. They cannot be fewer than 32 pixels and must be 2 pixel-aligned.
In single mode, only one channel can be displayed. Therefore, after the channel priority is set by calling hi_mpi_vo_set_chn_attr, only the channel with the highest priority is displayed.
Currently, this API does not support multiple processes.
Currently, only the single mode is supported. The multi mode is reserved and is not intercepted currently.

Parent topic: VO