/**
* 最简单的基于FFmpeg的视频播放器
* Simplest FFmpeg Player
*
* 雷霄骅 Lei Xiaohua
* leixiaohua1020@126.com
* 中国传媒大学/数字电视技术
* Communication University of China / Digital TV Technology
* http://blog.csdn.net/leixiaohua1020
*
* 本程序实现了视频文件的解码和显示(支持HEVC,H.264,MPEG2等)。
* 是最简单的FFmpeg视频解码方面的教程。
* 通过学习本例子可以了解FFmpeg的解码流程。
* This software is a simplest video player based on FFmpeg.
* Suitable for beginner of FFmpeg.
*/
#include <stdio.h>
#define __STDC_CONSTANT_MACROS
#ifdef _WIN32
//Windows
extern "C"
{
#include "libavcodec/avcodec.h"
#include "libavformat/avformat.h"
#include "libswscale/swscale.h"
#include "SDL/SDL.h"
};
#else
//Linux...
#ifdef __cplusplus
extern "C"
{
#endif
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libswscale/swscale.h>
#include <SDL/SDL.h>
#ifdef __cplusplus
};
#endif
#endif
//Full Screen
#define SHOW_FULLSCREEN 0
//Output YUV420P
#define OUTPUT_YUV420P 0
int main(int argc, char* argv[])
{
//FFmpeg
AVFormatContext *pFormatCtx;
int i, videoindex;
AVCodecContext *pCodecCtx;
AVCodec *pCodec;
AVFrame *pFrame,*pFrameYUV;
AVPacket *packet;
struct SwsContext *img_convert_ctx;
//SDL
int screen_w,screen_h;
SDL_Surface *screen;
SDL_VideoInfo *vi;
SDL_Overlay *bmp;
SDL_Rect rect;
FILE *fp_yuv;
int ret, got_picture;
char filepath[]="bigbuckbunny_480x272.h265";
av_register_all();
avformat_network_init();
pFormatCtx = avformat_alloc_context();
if(avformat_open_input(&pFormatCtx,filepath,NULL,NULL)!=0){
printf("Couldn't open input stream.\n");
return -1;
}
if(avformat_find_stream_info(pFormatCtx,NULL)<0){
printf("Couldn't find stream information.\n");
return -1;
}
videoindex=-1;
for(i=0; i<pFormatCtx->nb_streams; i++)
if(pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO){
videoindex=i;
break;
}
if(videoindex==-1){
printf("Didn't find a video stream.\n");
return -1;
}
pCodecCtx=pFormatCtx->streams[videoindex]->codec;
pCodec=avcodec_find_decoder(pCodecCtx->codec_id);
if(pCodec==NULL){
printf("Codec not found.\n");
return -1;
}
if(avcodec_open2(pCodecCtx, pCodec,NULL)<0){
printf("Could not open codec.\n");
return -1;
}
pFrame=av_frame_alloc();
pFrameYUV=av_frame_alloc();
//uint8_t *out_buffer=(uint8_t *)av_malloc(avpicture_get_size(PIX_FMT_YUV420P, pCodecCtx->width, pCodecCtx->height));
//avpicture_fill((AVPicture *)pFrameYUV, out_buffer, PIX_FMT_YUV420P, pCodecCtx->width, pCodecCtx->height);
//SDL----------------------------
if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER)) {
printf( "Could not initialize SDL - %s\n", SDL_GetError());
return -1;
}
#if SHOW_FULLSCREEN
vi = SDL_GetVideoInfo();
screen_w = vi->current_w;
screen_h = vi->current_h;
screen = SDL_SetVideoMode(screen_w, screen_h, 0,SDL_FULLSCREEN);
#else
screen_w = pCodecCtx->width;
screen_h = pCodecCtx->height;
screen = SDL_SetVideoMode(screen_w, screen_h, 0,0);
#endif
if(!screen) {
printf("SDL: could not set video mode - exiting:%s\n",SDL_GetError());
return -1;
}
bmp = SDL_CreateYUVOverlay(pCodecCtx->width, pCodecCtx->height,SDL_YV12_OVERLAY, screen);
rect.x = 0;
rect.y = 0;
rect.w = screen_w;
rect.h = screen_h;
//SDL End------------------------
packet=(AVPacket *)av_malloc(sizeof(AVPacket));
//Output Information-----------------------------
printf("------------- File Information ------------------\n");
av_dump_format(pFormatCtx,0,filepath,0);
printf("-------------------------------------------------\n");
#if OUTPUT_YUV420P
fp_yuv=fopen("output.yuv","wb+");
#endif
SDL_WM_SetCaption("Simplest FFmpeg Player",NULL);
img_convert_ctx = sws_getContext(pCodecCtx->width, pCodecCtx->height, pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height, PIX_FMT_YUV420P, SWS_BICUBIC, NULL, NULL, NULL);
//------------------------------
while(av_read_frame(pFormatCtx, packet)>=0){
if(packet->stream_index==videoindex){
//Decode
ret = avcodec_decode_video2(pCodecCtx, pFrame, &got_picture, packet);
if(ret < 0){
printf("Decode Error.\n");
return -1;
}
if(got_picture){
SDL_LockYUVOverlay(bmp);
pFrameYUV->data[0]=bmp->pixels[0];
pFrameYUV->data[1]=bmp->pixels[2];
pFrameYUV->data[2]=bmp->pixels[1];
pFrameYUV->linesize[0]=bmp->pitches[0];
pFrameYUV->linesize[1]=bmp->pitches[2];
pFrameYUV->linesize[2]=bmp->pitches[1];
sws_scale(img_convert_ctx, (const uint8_t* const*)pFrame->data, pFrame->linesize, 0,
pCodecCtx->height, pFrameYUV->data, pFrameYUV->linesize);
#if OUTPUT_YUV420P
int y_size=pCodecCtx->width*pCodecCtx->height;
fwrite(pFrameYUV->data[0],1,y_size,fp_yuv); //Y
fwrite(pFrameYUV->data[1],1,y_size/4,fp_yuv); //U
fwrite(pFrameYUV->data[2],1,y_size/4,fp_yuv); //V
#endif
SDL_UnlockYUVOverlay(bmp);
SDL_DisplayYUVOverlay(bmp, &rect);
//Delay 40ms
SDL_Delay(40);
}
}
av_free_packet(packet);
}
//FIX: Flush Frames remained in Codec
while (1) {
ret = avcodec_decode_video2(pCodecCtx, pFrame, &got_picture, packet);
if (ret < 0)
break;
if (!got_picture)
break;
sws_scale(img_convert_ctx, (const uint8_t* const*)pFrame->data, pFrame->linesize, 0, pCodecCtx->height, pFrameYUV->data, pFrameYUV->linesize);
SDL_LockYUVOverlay(bmp);
pFrameYUV->data[0]=bmp->pixels[0];
pFrameYUV->data[1]=bmp->pixels[2];
pFrameYUV->data[2]=bmp->pixels[1];
pFrameYUV->linesize[0]=bmp->pitches[0];
pFrameYUV->linesize[1]=bmp->pitches[2];
pFrameYUV->linesize[2]=bmp->pitches[1];
#if OUTPUT_YUV420P
int y_size=pCodecCtx->width*pCodecCtx->height;
fwrite(pFrameYUV->data[0],1,y_size,fp_yuv); //Y
fwrite(pFrameYUV->data[1],1,y_size/4,fp_yuv); //U
fwrite(pFrameYUV->data[2],1,y_size/4,fp_yuv); //V
#endif
SDL_UnlockYUVOverlay(bmp);
SDL_DisplayYUVOverlay(bmp, &rect);
//Delay 40ms
SDL_Delay(40);
}
sws_freeContext(img_convert_ctx);
#if OUTPUT_YUV420P
fclose(fp_yuv);
#endif
SDL_Quit();
//av_free(out_buffer);
av_free(pFrameYUV);
avcodec_close(pCodecCtx);
avformat_close_input(&pFormatCtx);
return 0;
}
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本程序实现了视频文件的解码和显示(支持HEVC,H.264,MPEG2等)。是最简单的FFmpeg视频解码方面的教程。通过学习本例子可以了解FFmpeg的解码流程。 项目包含两个工程: simplest_ffmpeg_player:标准版,FFmpeg学习的开始。 simplest_ffmpeg_player_su:SU(SDL Update)版,加入了简单的SDL的Event。 这显示该程序的最终版,除了支持VC2010之外,也支持如下几种编译方式: cl.exe命令行编译; mingw编译; gcc编译; gcc(MacOS)编译; 此外修复了个别操作系统(例如Ubuntu)中绿屏的问题。
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