用VM虚拟机,c语言写一个可以播放视频的代码
时间: 2024-03-19 12:42:16 浏览: 12
以下是使用C语言编写的可以播放视频的示例代码:
```c
#include <stdio.h>
#include <stdlib.h>
#include <SDL2/SDL.h>
#define FILENAME "video.mp4" // 视频文件名
int main(int argc, char *argv[]) {
SDL_Init(SDL_INIT_VIDEO);
// 创建窗口
SDL_Window *window = SDL_CreateWindow("Video Player", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 640, 480, SDL_WINDOW_SHOWN);
if (!window) {
printf("Failed to create window: %s\n", SDL_GetError());
return -1;
}
// 创建渲染器
SDL_Renderer *renderer = SDL_CreateRenderer(window, -1, 0);
if (!renderer) {
printf("Failed to create renderer: %s\n", SDL_GetError());
SDL_DestroyWindow(window);
SDL_Quit();
return -1;
}
// 打开视频文件
SDL_RWops *src = SDL_RWFromFile(FILENAME, "rb");
if (!src) {
printf("Failed to open video file: %s\n", SDL_GetError());
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(window);
SDL_Quit();
return -1;
}
// 创建视频解码器
SDL_Texture *texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_YV12, SDL_TEXTUREACCESS_STREAMING, 640, 480);
if (!texture) {
printf("Failed to create texture: %s\n", SDL_GetError());
SDL_RWclose(src);
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(window);
SDL_Quit();
return -1;
}
// 创建视频帧存储空间
uint8_t *yPlane = (uint8_t*) malloc(640 * 480);
uint8_t *uPlane = (uint8_t*) malloc(640 / 2 * 480 / 2);
uint8_t *vPlane = (uint8_t*) malloc(640 / 2 * 480 / 2);
int yPitch = 640;
int uPitch = 640 / 2;
int vPitch = 640 / 2;
SDL_Event event;
int quit = 0;
while (!quit) {
// 读取视频帧
if (SDL_LoadYUV_RW(src, yPlane, yPitch, uPlane, uPitch, vPlane, vPitch, 640, 480) <= 0) {
// 如果读取到了视频文件的结尾,则重头开始播放
SDL_RWseek(src, 0, RW_SEEK_SET);
SDL_LoadYUV_RW(src, yPlane, yPitch, uPlane, uPitch, vPlane, vPitch, 640, 480);
}
// 将视频帧上传到纹理中
SDL_UpdateYUVTexture(texture, NULL, yPlane, yPitch, uPlane, uPitch, vPlane, vPitch);
// 渲染纹理到窗口
SDL_RenderClear(renderer);
SDL_RenderCopy(renderer, texture, NULL, NULL);
SDL_RenderPresent(renderer);
// 处理事件
while (SDL_PollEvent(&event)) {
if (event.type == SDL_QUIT) {
quit = 1;
}
}
// 暂停一段时间,以控制视频的帧率
SDL_Delay(16);
}
// 释放资源
free(yPlane);
free(uPlane);
free(vPlane);
SDL_DestroyTexture(texture);
SDL_RWclose(src);
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(window);
SDL_Quit();
return 0;
}
```
这个示例代码使用SDL库播放视频。它打开视频文件,创建视频解码器,读取视频帧并将它们上传到纹理中,最后渲染纹理到窗口。你可以将视频文件放在与源文件同一目录下,并将FILENAME常量设置为视频文件名,然后编译并运行这个C程序即可播放视频。