本站教程收集整理的这篇文章主要介绍了Ubuntu移植FFmpeg和SDL2，本站教程本站觉得挺不错的，现在分享给大家，也给大家做个参考。
1.libx264是一个自由的H.264编码库，是x264项目的一部分，使用广泛，ffmpeg的H.264实现就是用的libx264。ffmpeg 中带有264的解码,没有编码,需要添加x264。
去官网下载一个libx264的压缩文件。
我用的是x264-snapshot-20171212-2245
x264官方网站
解压文件
2.SDL2
我用的是SDL2-2.0.10
SDL2官方网站
3.ffmpeg
我用的是ffmpeg-3.4.5
ffmpeg官方网站
装好之后可用代码测试，以下用雷神的代码
雷神博客
/**
* 最简单的基于FFmpeg的视频播放器 2
* Simplest FFmpeg Player 2
*
* 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
*
* 第2版使用SDL2.0取代了第一版中的SDL1.2
* Version 2 use SDL 2.0 instead of SDL 1.2 in version 1.
*
* 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 "libavutil/imgutils.h"
#include "SDL2/SDl.h"
};
#else
//Linux...
#ifdef __cplusplus
extern "C"
{
#endif
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libswscale/swscale.h>
#include <SDL2/SDl.h>
#include <libavutil/imgutils.h>
#ifdef __cplusplus
};
#endif
#endif
//Output YUV420P data as a file
#define OUTPUT_YUV420P 0
int main(int argc, char* argv[])
{
AVFormatContext *pformatCtx;
int i, videoindex;
AVCodecContext *pCodecCtx;
AVCodec *pCodec;
AVFrame *pFrame,*pFrameYUV;
unsigned char *ouT_Buffer;
AVPacket *packet;
int y_size;
int ret, got_picture;
struct SwsContext *img_convert_ctx;
char filepath[]="bigbuckbunny_480x272.h265";
//SDL---------------------------
int screen_w=0,screen_h=0;
SDL_Window *screen;
SDL_Renderer* sdlRenderer;
SDL_Texture* sdlTexture;
SDL_Rect sdlRect;
FILE *fp_yuv;
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 @R_650_4036@ion.\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();
ouT_Buffer=(unsigned char *)av_malloc(av_image_geT_Buffer_size(AV_PIX_FMT_YUV420P, pCodecCtx->width, pCodecCtx->height,1));
av_image_fill_arrays(pFrameYUV->data, pFrameYUV->linesize,ouT_Buffer,
AV_PIX_FMT_YUV420P,pCodecCtx->width, pCodecCtx->height,1);
packet=(AVPacket *)av_malloc(sizeof(AVPacket));
//Output Info-----------------------------
printf("--------------- File @R_650_4036@ion ----------------\n");
av_dump_format(pformatCtx,0,filepath,0);
printf("-------------------------------------------------\n");
img_convert_ctx = sws_getContext(pCodecCtx->width, pCodecCtx->height, pCodecCtx->pix_fmt,
pCodecCtx->width, pCodecCtx->height, AV_PIX_FMT_YUV420P, SWS_BICUBIC, NULL, NULL, null);
#if OUTPUT_YUV420P
fp_yuv=fopen("output.yuv","wb+");
#endif
if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUdio | SDL_INIT_TIMER)) {
printf( "Could not initialize SDL - %s\n", SDL_GetError());
return -1;
}
screen_w = pCodecCtx->width;
screen_h = pCodecCtx->height;
//SDL 2.0 Support for multiple windows
screen = SDL_CreateWindow("Simplest ffmpeg player's Window", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
screen_w, screen_h,
SDL_WINDOW_OPENGL);
if(!screen) {
printf("SDL: Could not create window - exiTing:%s\n",SDL_GetError());
return -1;
}
sdlRenderer = SDL_CreateRenderer(screen, -1, 0);
//IYUV: Y + U + V (3 planes)
//YV12: Y + V + U (3 planes)
sdlTexture = SDL_CreateTexture(sdlRenderer, SDL_PIXELFORMAT_IYUV, SDL_TEXTUREACCESS_STREAMING,pCodecCtx->width,pCodecCtx->height);
sdlRect.x=0;
sdlRect.y=0;
sdlRect.香港vpsw=screen_w;
sdlRect.h=screen_h;
//SDL End----------------------
while(av_read_frame(pformatCtx, packet)>=0){
if(packet->stream_index==videoindeX){
ret = avcodec_decode_video2(pCodecCtx, pFrame, &got_picture, packet);
if(ret < 0){
printf("Decode Error.\n");
return -1;
}
if(got_picturE){
sws_scale(img_convert_ctx, (const unsigned char* const*)pFrame->data, pFrame->linesize, 0, pCodecCtx->height,
pFrameYUV->data, pFrameYUV->linesizE);
#if OUTPUT_YUV420P
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---------------------------
#if 0
SDL_updateTexture( sdlTexture, NULL, pFrameYUV->data[0], pFrameYUV->linesize[0] );
#else
SDL_updateYUVTexture(sdlTexture, &sdlRect,
pFrameYUV->data[0], pFrameYUV->linesize[0],
pFrameYUV->data[1], pFrameYUV->linesize[1],
pFrameYUV->data[2], pFrameYUV->linesize[2]);
#endif
SDL_RenderClear( sdlRenderer );
SDL_Rendercopy( sdlRenderer, sdlTexture, NULL, &sdlRect);
SDL_RenderPresent( sdlRenderer );
//SDL End-----------------------
//Delay 40ms
SDL_Delay(40);
}
}
av_free_packet(packet);
}
//flush decoder
//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 unsigned char* 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---------------------------
SDL_updateTexture( sdlTexture, &sdlRect, pFrameYUV->data[0], pFrameYUV->linesize[0] );
SDL_RenderClear( sdlRenderer );
SDL_Rendercopy( sdlRenderer, sdlTexture, NULL, &sdlRect);
SDL_RenderPresent( sdlRenderer );
//SDL End-----------------------
//Delay 40ms
SDL_Delay(40);
}
sws_freeContext(img_convert_ctX);
#if OUTPUT_YUV420P
fclose(fp_yuv);
#endif
SDL_Quit();
av_frame_free(&pFrameYUV);
av_frame_free(&pFramE);
avcodec_close(pCodecCtX);
avformat_close_input(&pformatCtX);
return 0;
}
编译命令
如果运行出现Could not initialize SDL，建议将SDL2再装一次。这一次不指定目录
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