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2026-06-18

计算视频平均亮度 - CalculateAverageBrightness ​

函数简介 ​

计算视频平均亮度。

接口名称 ​

CalculateAverageBrightness

DLL调用 ​

c
double CalculateAverageBrightness(int64_t instance, string videoPath);

参数说明 ​

参数名类型说明
instance长整数型OLAPlug对象的指针，由 CreateCOLAPlugInterFace 接口生成。
videoPath字符串视频文件路径。

示例 ​

SDK 调用 ​

cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
double value = ola.CalculateAverageBrightness("videos/demo.mp4");
csharp
using OLAPlug;

var ola = new OLAPlugServer();
double value = ola.CalculateAverageBrightness("videos/demo.mp4");
python
from OLAPlugServer import OLAPlugServer

ola = OLAPlugServer()
value = ola.CalculateAverageBrightness("videos/demo.mp4")
java
import com.olaplug.OLAPlugServer;

OLAPlugServer ola = new OLAPlugServer();
double value = ola.CalculateAverageBrightness("videos/demo.mp4");
cpp
var ola = com("OlaPlug.OlaSoft")
var value = ola.CalculateAverageBrightness("videos/demo.mp4")
vbscript
Set ola = CreateObject("OlaPlug.OlaSoft")
value = ola.CalculateAverageBrightness("videos/demo.mp4")
text
.局部变量 ola, OLAPlug
ola.创建 ()
value ＝ ola.CalculateAverageBrightness("videos/demo.mp4")
aardio
import OLAPlugServer;
var ola = OLAPlugServer();
var value = ola.CalculateAverageBrightness("videos/demo.mp4");
text
变量 ola <类型 = OLAPlugServer>
ola = 新建 OLAPlugServer
双精度 value = ola.CalculateAverageBrightness("videos/demo.mp4")
cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
double value = ola.CalculateAverageBrightness("videos/demo.mp4");

原生 DLL 调用 ​

cpp
CalculateAverageBrightness(instance, "videos/demo.mp4");
csharp
using System.Runtime.InteropServices;
using System.Text;

[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern int CalculateAverageBrightness(long ola, string videoPath);

CalculateAverageBrightness(instance, "videos/demo.mp4");
python
from ctypes import CDLL, c_int, c_int64, create_string_buffer

ola = CDLL("OLAPlug_x64.dll")
ola.CreateCOLAPlugInterFace.restype = c_int64
ola.CalculateAverageBrightness(instance, "videos/demo.mp4")

返回值 ​

返回值说明
255），失败返回。
1。