C++利用VLC库制作音视频的示例代码

#include <iostream>
#include "vlc.h"
#include <conio.h>
 
//编码转换
#include <Windows.h>
std::string Unicode2Utf8(const std::wstring& strIn)
{
	std::string str;
	int length = ::WideCharToMultiByte(CP_UTF8, 0, strIn.c_str(), strIn.size(), NULL, 0, NULL, NULL);
	str.resize(length + 1);
	::WideCharToMultiByte(CP_UTF8, 0, strIn.c_str(), strIn.size(), (LPSTR)str.c_str(), length, NULL, NULL);
	return str;
}
 
int main()
{
	int argc = 1;
	char* argv[2];
	argv[0] = (char*)"--ignore-config";  //忽略配置
	libvlc_instance_t* vlc_ins = libvlc_new(argc, argv);  //①创建实例
	std::string path = Unicode2Utf8(L"file:///D:\\C++Project\\VideoPlay\\VideoPlay\\音乐.mp4");
	libvlc_media_t* media = libvlc_media_new_location(vlc_ins, path.c_str());
	//libvlc_media_t* media = libvlc_media_new_path(vlc_ins, "音乐.mp4");  //②创建媒体
	//media = libvlc_media_new_location(vlc_ins, "file:///D:\\C++Project\\VideoPlay\\VideoPlay\\音乐.mp4");
	libvlc_media_player_t* player = libvlc_media_player_new_from_media(media); //③创建播放器
	do
	{
		int ret = libvlc_media_player_play(player);  //④播放 返回值0开始 -1错误
		if (ret == -1) {
			printf("error found!\r\n");
			break;
		}
		int vol = -1;
		while (vol == -1)
		{
			Sleep(10);
			vol = libvlc_audio_get_volume(player);  //获取音量 默认100
		}
		//只有media解析加载完成，才会有下面的参数
		printf("volume is %d\r\n", vol);
		libvlc_audio_set_volume(player, 10);  //将音量设置到10
		libvlc_time_t tm = libvlc_media_player_get_length(player);  //获取长度（毫秒数）
		printf("%02d:%02d:%02d\r\n", int(tm / 1000 / 3600), int((tm / 1000 / 60) % 60), int(tm / 1000 % 60));
		int width = libvlc_video_get_width(player);  //获取宽和高
		int height = libvlc_video_get_height(player);
		printf("width = %d height = %d\r\n", width, height);
		while (!_kbhit()) {  //检验键盘是否按下  按下为1
			printf("%f%%\r", 100.0 * libvlc_media_player_get_position(player));  //获取播放进度
			Sleep(500);
		}
		getchar();
		libvlc_media_player_pause(player);  //暂停
		getchar();
		libvlc_media_player_play(player);  //继续
		getchar();
		libvlc_media_player_stop(player);  //停止
	} while (0);
	libvlc_media_player_release(player); //⑤释放播放器
	libvlc_media_release(media);  //⑥释放媒体
	libvlc_release(vlc_ins);  //⑦释放实例
 
	return 0;
}