ffmpeg delogo滤镜去除图片水印

最新推荐文章于 2025-10-17 08:22:37 发布

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最新推荐文章于 2025-10-17 08:22:37 发布 · 4.7k 阅读

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#音视频

之前本人写过ffmpeg movie滤镜添加图片水印，ffmpeg 非movie滤镜添加图片水印
今天用delogo滤镜去掉图片水印，ffmpeg命令行如下：

ffmpeg -i in-computer_drawmovie.mp4 -vf delogo=x=100:y=300:w=480:h=320:show=0 in-computer_drawmovie_delogo.mp4

指定去除的起始位置为100,300，水印的宽度和高度分别为480和320。

水印去除前，效果如下：
在这里插入图片描述
去除水印后，效果如下：

去除的原理是根据被去掉部分周围的色彩进行颜色构造，具体我暂时没兴趣研究。

下面是代码结构：
在这里插入图片描述
FfmpegDelogoTest.cpp的代码如下：

#include <iostream>
#include "Delogo.h"
#include <vector>

#ifdef	__cplusplus
extern "C"
{
   
   
#endif

#pragma comment(lib, "avcodec.lib")
#pragma comment(lib, "avformat.lib")
#pragma comment(lib, "avutil.lib")
#pragma comment(lib, "avdevice.lib")
#pragma comment(lib, "avfilter.lib")
#pragma comment(lib, "postproc.lib")
#pragma comment(lib, "swresample.lib")
#pragma comment(lib, "swscale.lib")


#ifdef __cplusplus
};
#endif



std::string Unicode_to_Utf8(const std::string & str)
{
   
   
	int nwLen = ::MultiByteToWideChar(CP_ACP, 0, str.c_str(), -1, NULL, 0);
	wchar_t * pwBuf = new wchar_t[nwLen + 1];//一定要加1，不然会出现尾巴 
	ZeroMemory(pwBuf, nwLen * 2 + 2);
	::MultiByteToWideChar(CP_ACP, 0, str.c_str(), str.length(), pwBuf, nwLen);
	int nLen = ::WideCharToMultiByte(CP_UTF8, 0, pwBuf, -1, NULL, NULL, NULL, NULL);
	char * pBuf = new char[nLen + 1];
	ZeroMemory(pBuf, nLen + 1);
	::WideCharToMultiByte(CP_UTF8, 0, pwBuf, nwLen, pBuf, nLen, NULL, NULL);
	std::string retStr(pBuf);
	delete[]pwBuf;
	delete[]pBuf;
	pwBuf = NULL;
	pBuf = NULL;
	return retStr;
}


int main()
{
   
   
	CDelogo cCDelogo;
	const char *pFileA = "E:\\learn\\ffmpeg\\FfmpegFilterTest\\x64\\Release\\in-computer_drawmovie.mp4";

	const char *pFileOut = "E:\\learn\\ffmpeg\\FfmpegFilterTest\\x64\\Release\\in-computer_drawmovie_delogo.mp4";

	int x = 100;
	int y = 300;
	int width = 480;
	int height = 320;
	cCDelogo.StartDelogo(pFileA, pFileOut, x, y, width, height);
	cCDelogo.WaitFinish();
	return 0;
}

Delogo.h的代码如下：

#pragma once

#include <Windows.h>
#include <string>

#ifdef	__cplusplus
extern "C"
{
   
   
#endif
#include "libavcodec/avcodec.h"
#include "libavformat/avformat.h"
#include "libswscale/swscale.h"
#include "libswresample/swresample.h"
#include "libavdevice/avdevice.h"
#include "libavutil/audio_fifo.h"
#include "libavutil/avutil.h"
#include "libavutil/fifo.h"
#include "libavutil/frame.h"
#include "libavutil/imgutils.h"

#include "libavfilter/avfilter.h"
#include "libavfilter/buffersink.h"
#include "libavfilter/buffersrc.h"


#ifdef __cplusplus
};
#endif

class CDelogo
{
   
   
public:
	CDelogo();
	~CDelogo();
public:
	int StartDelogo(const char *pFileA, const char *pFileOut, int x, int y, int width, int height);
	int WaitFinish();
private