Question

这是创建纹理以渲染1280 * 720 [高清版]图像的正确方法吗？

我通过ffmpeg从RTSP服务器接收数据包，并解码并获取帧。

要渲染我，请按照以下步骤操作。

 SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER);

 screen = SDL_CreateWindow("TEST APPLICATION", SDL_WINDOWPOS_UNDEFINED,
                    SDL_WINDOWPOS_UNDEFINED, 0, 0,
                    SDL_WINDOW_SHOWN | SDL_WINDOW_FULLSCREEN);

bmp = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_IYUV, SDL_TEXTUREACCESS_STREAMING, 1280, 720);

SDL_RenderSetLogicalSize(renderer, 1280, 720);


 while (1)
  {
    Handling SDL Event.    ->
    for (;;)  {
    while ( SDL_PollEvent(&event))
      switch (event.type) {
        case SDL_QUIT:
        case SDL_KEYDOWN:
                SDL_Quit ();
                exit (0);
                break;
        case DISPLAY_IMAGE:
                SDL_UpdateYUVTexture(bmp, NULL, pFrame->data[0],
                                     pFrame->linesize[0], pFrame->data[1], 
                                     pFrame->linesize[1],
                                     pFrame->data[2], pFrame->linesize[2]);

                SDL_RenderClear(renderer);
                SDL_RenderCopy(renderer, bmp, NULL, NULL);
                SDL_RenderPresent(renderer);
                break;
          }

  }

另外，从其他一些主题，我将推动这样的事件：

SDL_Event event;
event.type =  DISPLAY_IMAGE;
SDL_PushEvent (&event);

请告诉我这是否是正确的做法？

在SDL2中处理1280 * 720 [高清版]的帧大小如何？

0 个答案: