SDL和FFMPEG视频播放例子
2012-10-18 12:39
507 查看
SDL和FFMPEG 视频播放例子
// tutorial02.c // A pedagogical video player that will stream through every video frame as fast as it can. // // Code based on FFplay, Copyright (c) 2003 Fabrice Bellard, // and a tutorial by Martin Bohme (boehme@inb.uni-luebeckREMOVETHIS.de) // Tested on Gentoo, CVS version 5/01/07 compiled with GCC 4.1.1 // Use // // gcc -o v_play v_play.c -lavformat -lavcodec -lz -lm `sdl-config --cflags --libs` // to build (assuming libavformat and libavcodec are correctly installed, // and assuming you have sdl-config. Please refer to SDL docs for your installation.) // // Run using // v_play myvideofile.mpg // // to play the video stream on your screen. #include <libavcodec/avcodec.h> #include <libavformat/avformat.h> #include <SDL/SDL.h> #include <SDL/SDL_thread.h> #undef main /* Prevents SDL from overriding main() */ #include <stdio.h> int main(int argc, char *argv[]) { AVFormatContext *pFormatCtx; int i, videoStream; AVCodecContext *pCodecCtx; AVCodec *pCodec; AVFrame *pFrame; AVPacket packet; int frameFinished; float aspect_ratio; SDL_Overlay *bmp; SDL_Surface *screen; SDL_Rect rect; SDL_Event event; if(argc < 2) { fprintf(stderr, "Usage: test <file>\n"); exit(1); } // Register all formats and codecs av_register_all(); if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER)) { fprintf(stderr, "Could not initialize SDL - %s\n", SDL_GetError()); exit(1); } // Open video file if(av_open_input_file(&pFormatCtx, argv[1], NULL, 0, NULL)!=0) return -1; // Couldn't open file // Retrieve stream information if(av_find_stream_info(pFormatCtx)<0) return -1; // Couldn't find stream information // Dump information about file onto standard error dump_format(pFormatCtx, 0, argv[1], 0); // Find the first video stream videoStream=-1; for(i=0; i<pFormatCtx->nb_streams; i++) if(pFormatCtx->streams[i]->codec->codec_type==CODEC_TYPE_VIDEO) { videoStream=i; break; } if(videoStream==-1) return -1; // Didn't find a video stream // Get a pointer to the codec context for the video stream pCodecCtx=pFormatCtx->streams[videoStream]->codec; // Find the decoder for the video stream pCodec=avcodec_find_decoder(pCodecCtx->codec_id); if(pCodec==NULL) { fprintf(stderr, "Unsupported codec!\n"); return -1; // Codec not found } // Open codec if(avcodec_open(pCodecCtx, pCodec)<0) return -1; // Could not open codec // Allocate video frame pFrame=avcodec_alloc_frame(); // Make a screen to put our video #ifndef __DARWIN__ screen = SDL_SetVideoMode(pCodecCtx->width, pCodecCtx->height, 0, 0); #else screen = SDL_SetVideoMode(pCodecCtx->width, pCodecCtx->height, 24, 0); #endif if(!screen) { fprintf(stderr, "SDL: could not set video mode - exiting\n"); exit(1); } // Allocate a place to put our YUV image on that screen bmp = SDL_CreateYUVOverlay(pCodecCtx->width, pCodecCtx->height, SDL_YV12_OVERLAY, screen); // Read frames and save first five frames to disk i=0; while(av_read_frame(pFormatCtx, &packet)>=0) { // Is this a packet from the video stream? if(packet.stream_index==videoStream) { // Decode video frame avcodec_decode_video(pCodecCtx, pFrame, &frameFinished, packet.data, packet.size); // Did we get a video frame? if(frameFinished) { SDL_LockYUVOverlay(bmp); AVPicture pict; pict.data[0] = bmp->pixels[0]; pict.data[1] = bmp->pixels[2]; pict.data[2] = bmp->pixels[1]; pict.linesize[0] = bmp->pitches[0]; pict.linesize[1] = bmp->pitches[2]; pict.linesize[2] = bmp->pitches[1]; // Convert the image into YUV format that SDL uses img_convert(&pict, PIX_FMT_YUV420P, (AVPicture *)pFrame, pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height); SDL_UnlockYUVOverlay(bmp); rect.x = 0; rect.y = 0; rect.w = pCodecCtx->width; rect.h = pCodecCtx->height; SDL_DisplayYUVOverlay(bmp, &rect); } } // Free the packet that was allocated by av_read_frame av_free_packet(&packet); SDL_PollEvent(&event); switch(event.type) { case SDL_QUIT: SDL_Quit(); exit(0); break; default: break; } } // Free the YUV frame av_free(pFrame); // Close the codec avcodec_close(pCodecCtx); // Close the video file av_close_input_file(pFormatCtx); return 0; }
相关文章推荐
- FFMPEG小白-day10(sdl项目播放视频进阶)
- Android平台上使用SDL官方demo播放视频(使用ffmpeg最新版解码)
- MFC 播放视频 FFMPEG SDL
- FFMPEG小白-day08(sdl项目播放视频流程及结构体关系图)
- FFmpeg+SDL视频播放(1)
- ffmpeg SDL播放视频
- Android平台上使用SDL官方demo播放视频(使用ffmpeg最新版解码)
- 应用FFMPEG和SDL,播放视频文件
- ffmpeg+SDL的使用之使用SDL播放视频流
- ffmpeg和SDL实现的视频播放程序
- VC++实现视频聊天:FFmpeg解码+SDL播放视频
- Android平台上使用SDL官方demo播放视频(使用ffmpeg最新版解码)
- 在Android上使用FFMPEG和SDL 2.X播放视频
- 音视频处理-ffmpeg+sdl视频播放
- FFmpeg+SDL视频播放(2)
- Ubuntu11.04下编译ffmpeg,利用SDL1.2播放视频
- FFmpeg+SDL视频播放(4)
- FFmpeg+SDL视频播放(3)
- MFC中如何利用ffmpeg和SDL2.0多线程多窗口播放摄像头的视频
- 最简单的SDL2播放视频的例子(SDL2播放RGB/YUV)