sdl

FFMPEG工程浩大，可以参考的书籍又不是很多，因此很多刚学习FFMPEG的人常常感觉到无从下手。我刚接触FFMPEG的时候也感觉不知从何学起。 因此我把自己做项目过程中实现的一个非常简单的视频播放器（大约100行代码）源代码传上来，以作备忘，同时方便新手学习FFMPEG。 该播放器虽然简单，但是几乎包含了使用FFMPEG播放一个视频所有必备的API，并且使用SDL显示解码出来的视频。 并且支持流媒体等多种视频输入，处于简单考虑，没有音频部分，同时视频播放采用直接延时40ms的方式 平台使用VC2010 使用了最新的FFMPEG类库 直接贴代码 int _tmain(int argc, _TCHAR* argv[]) { AVFormatContext *pFormatCtx; int i, videoindex; AVCodecContext *pCodecCtx; AVCodec *pCodec; char filepath[]="nwn.mp4"; av_register_all(); avformat_network_init(); pFormatCtx = avformat_alloc_context(); if(avformat_open_input(&pFormatCtx,filepath,NULL,NULL)!=0){ printf("无法打开文件\n");

This is a continuation of my previous post. Since it has already been closed I decided to make a new post. I removed half of the code to make it more readable. Some of the posts I read: Smart pointers with SDL Is it possible to use SDL2 with smart pointers? Couple of questions about SDL_Window and unique_ptr class cGraphics { public: // Creator functions std::unique_ptr<SDL_Window, decltype(&SDL_DestroyWindow)> Create_Window(int xWin, int yWin); // ctor & dtor cGraphics() : m_Window(nullptr, SDL_DestroyWindow) {} cGraphics(int xWin, int yWin); ~cGraphics(); private: std::unique_ptr<SDL_Window,

I'm writing C code that controls a Logitech gaming wheel using SDL. So far I have successfully implemented the code that sets the steering wheel in autocenter mode with: SDL_HapticSetAutocenter(haptic, STRENGTH); //set autocenter I would like to be able to use the motor of the steering wheel to rotate it as desired to particular angle positions. After checking in the documentation of the API , I did not find a simple way to do it. I wonder if anyone has some advice on this. 来源： https://stackoverflow.com/questions/50665809/set-logitech-steering-wheel-position-angle-from-sdl