ffmpeg 视频音频同步(有问题) 能单独播视频或者音频

int _tmain(int argc, _TCHAR* argv[]) { currentAudioClock = 0; currentVideoClock = 0; currentBufferClock = 0; //currentPlayClock=0; CurrentVolume = SDL_MIX_MAXVOLUME; if (SDL_Init(SDL_INIT_EVERYTHING) != 0) { fprintf(stderr, "Unable to initialize SDL: %s\n", SDL_GetError()); return 1; } SDL_EventState(SDL_SYSWMEVENT, SDL_IGNORE); SDL_EventState(SDL_USEREVENT, SDL_IGNORE); atexit(SDL_Quit);// 注册SDL_Quit，当退出时调用，使得退出时程序自动清理 //flag=2; //给音视频队列分配空间 videoQueue = (VideoQueue *)av_mallocz(sizeof(VideoQueue)); audioQueue = (AudioQueue *)av_mallocz(sizeof(AudioQueue)); //初始化音视频队列 VideoQueueInit(videoQueue); AudioQueueInit(audioQueue); char* url = "G:/上海滩.mp4"; //char* url = "G:/2014年5月26日17 12 00至2014年5月26日17 14 59.avi"; //char* url = "H:/视频/不当交易.The.Unjust.BD.MiniSD-TLF.mkv"; //char* url = "E:/BaiduMusic/Songs/Love Story - Taylor Swift.mp3"; decodeTid = SDL_CreateThread(DecodePacket, "DecodePacket", (void*)url); PlayVideoTid = SDL_CreateThread(PlayVideo, "PlayVideo", NULL); PlayAudioTid = SDL_CreateThread(PlayAudio, "PlayAudioTid", NULL); int tid; SDL_WaitThread(decodeTid, &tid); printf("decodeTid %d\n", tid); SDL_WaitThread(PlayVideoTid, &tid); printf("PlayVideoTid %d\n", tid); SDL_WaitThread(PlayAudioTid, &tid); printf("PlayAudioTid %d\n", tid); SDL_DestroyMutex(audioQueue->audioMutex); SDL_DestroyCond(audioQueue->audioCond); SDL_DestroyMutex(videoQueue->videoMutex); SDL_DestroyCond(videoQueue->videoCond); av_free(videoQueue); av_free(audioQueue); return 0; }