---
title: hi_venc_gop_bipred_b
description: "定义编码B帧GOP属性结构体，暂不支持。"
url: https://www.hiascend.com/document/detail/zh/canncommercial/latest/API/dvpp/aclcppdevg_03_1168.html
sourcePath: /source/zh/canncommercial/900/API/dvpp/aclcppdevg_03_1168.html
indexId: 13c77f3348de0db9cfd95806116184dcadd3e3ac04dc307b6a3fc5cdf4f45ef262
---
# hi_venc_gop_bipred_b

#### 说明

定义编码B帧GOP属性结构体，暂不支持。


#### 定义

```
typedef struct {
hi_u32
b_frame_num; // RW; Range:[1, 3]; Number of B frames
hi_s32
b_qp_delta; // RW; Range:[-10, 30]; QP variance between P frame and B frame
hi_s32
ip_qp_delta; // RW; Range:[-10, 30]; QP variance between P frame and I frame
} hi_venc_gop_bipred_b;
```