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批量提取视频帧并保存为文件 - ExtractFramesToFiles

函数简介

批量提取视频帧并保存为文件。

接口名称

ExtractFramesToFiles

DLL调用

c
int32_t ExtractFramesToFiles(int64_t instance, int64_t videoHandle, int32_t startFrame, int32_t endFrame, int32_t step, string outputDir, string imageFormat, int32_t jpegQuality);

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。
videoHandle长整数型视频句柄。
startFrame整数型起始帧索引。
endFrame整数型结束帧索引(-1表示到视频末尾)。
step整数型帧间隔(1表示每帧都提取)。
outputDir字符串输出目录。
imageFormat字符串图像格式("png"、"jpg"等)。
jpegQuality整数型JPEG质量(0-100)。

示例

SDK 调用

cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
int ret = ola.ExtractFramesToFiles(0, 0, 0, 0, "value", "png", 0);
csharp
using OLAPlug;

var ola = new OLAPlugServer();
int ret = ola.ExtractFramesToFiles(0, 0, 0, 0, "value", "png", 0);
python
from OLAPlugServer import OLAPlugServer

ola = OLAPlugServer()
ret = ola.ExtractFramesToFiles(0, 0, 0, 0, "value", "png", 0)
java
import com.olaplug.OLAPlugServer;

OLAPlugServer ola = new OLAPlugServer();
int ret = ola.ExtractFramesToFiles(0, 0, 0, 0, "value", "png", 0);
cpp
var ola = com("OlaPlug.OlaSoft")
var ret = ola.ExtractFramesToFiles(0, 0, 0, 0, "value", "png", 0)
vbscript
Set ola = CreateObject("OlaPlug.OlaSoft")
ret = ola.ExtractFramesToFiles(0, 0, 0, 0, "value", "png", 0)
text
.局部变量 ola, OLAPlug
ola.创建 ()
ret = ola.ExtractFramesToFiles(0, 0, 0, 0, “value”, “png”, 0)
aardio
import OLAPlugServer;
var ola = OLAPlugServer();
var ret = ola.ExtractFramesToFiles(0, 0, 0, 0, "value", "png", 0);
text
变量 ola <类型 = OLAPlugServer>
ola = 新建 OLAPlugServer
整数 ret = ola.ExtractFramesToFiles(0, 0, 0, 0, "value", "png", 0)
cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
int32_t ret = ola.ExtractFramesToFiles(0, 0, 0, 0, "value", "png", 0);

原生 DLL 调用

cpp
ExtractFramesToFiles(instance, 0, 0, 0, 0, "value", "png", 0);
csharp
using System.Runtime.InteropServices;
using System.Text;

[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern int ExtractFramesToFiles(long ola, int videoHandle, int startFrame, int endFrame, int step, string outputDir, string imageFormat, int jpegQuality);

ExtractFramesToFiles(instance, 0, 0, 0, 0, "value", "png", 0);
python
from ctypes import CDLL, c_int, c_int64, create_string_buffer

ola = CDLL("OLAPlug_x64.dll")
ola.CreateCOLAPlugInterFace.restype = c_int64
ola.ExtractFramesToFiles(instance, 0, 0, 0, 0, "value", "png", 0)

返回值

返回值说明
(返回值)整数型:返回提取的帧数,失败返回 0。