---
title: hi_vdec_chn_param
description: "定义解码通道高级参数。"
url: https://www.hiascend.com/document/detail/zh/canncommercial/latest/API/dvpp/aclpythondevg_01_0605.html
sourcePath: /source/zh/canncommercial/900/API/dvpp/aclpythondevg_01_0605.html
indexId: 92f9c5cc58a1309003c8ceca67566fc1ee4b8b64348611b052d9ece04fef2c4265
---
# hi_vdec_chn_param

#### 说明

定义解码通道高级参数。


#### 定义

```
hi_vdec_chn_param = {"type":
hi_payload_type
, # RW; video type to be decoded
"display_frame_num": display_frame_num, # RW, Range: [0, 16]; display frame num
"video_param":
hi_vdec_video_param
} # structure with video ( h265/h264/VP9)
hi_vdec_chn_param = {"type":
hi_payload_type
, # RW; video type to be decoded
"display_frame_num": display_frame_num, # RW, Range: [0, 16]; display frame num
"pic_param":
hi_vdec_param_picture
} # structure with picture (jpeg)
```


#### 成员

| 成员名称 | 描述 |
| --- | --- |
| type | 整型，解码协议。 |
| display\_frame\_num | 整型，解码缓存图像的最小帧数。 取值范围：[0, 16]。 默认值：2。 |
| video\_param | 字典，视频(H.264/H.265)解码高级参数。 |
| pic\_param | 字典，图片(JPEG)解码高级参数。 |