嵌入式linux------ffmpeg移植 编码H264（am335x编码H264） 分类： TI-AM335X ffmpeg-SDL-VLC-Live555 arm-linux-Ubuntu 2015-08-04 09:34 5人阅读 评论(0) 收藏

<pre name="code" class="cpp"><pre name="code" class="cpp">/*
arm-linux-gcc -o yuv2264  yuv2264.c -I/usr/local/ffmpeg_arm/include/   -L/usr/local/ffmpeg_arm/lib/ -lswresample -lavformat -lavutil -lavcodec -lswscale -lx264   libSDL.a
*/

#include "stdio.h"
#include "stdlib.h"


#include "libavformat/avformat.h"
#include "libavdevice/avdevice.h"
#include "libswresample/swresample.h"
#include "libavutil/opt.h"
#include "libavutil/channel_layout.h"
#include "libavutil/parseutils.h"
#include "libavutil/samplefmt.h"
#include "libavutil/fifo.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/dict.h"
#include "libavutil/mathematics.h"
#include "libavutil/pixdesc.h"
#include "libavutil/avstring.h"
#include "libavutil/imgutils.h"
#include "libavutil/timestamp.h"
#include "libavutil/bprint.h"
#include "libavutil/time.h"
#include "libavutil/threadmessage.h"


#include "libavfilter/avcodec.h"
#include "libavcodec/avcodec.h"




#if HAVE_SYS_RESOURCE_H
#include <sys/time.h>
#include <sys/types.h>
#include <sys/resource.h>
#elif HAVE_GETPROCESSTIMES
#include <windows.h>
#endif
#if HAVE_GETPROCESSMEMORYINFO
#include <windows.h>
#include <psapi.h>
#endif

#if HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif

#if HAVE_TERMIOS_H
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <termios.h>
#elif HAVE_KBHIT
#include <conio.h>
#endif

#if HAVE_PTHREADS
#include <pthread.h>
#endif

#include <time.h>

#include "libavutil/avassert.h"

#define MAX_LEN  1024 * 50


int main()
{
    //下面初始化h264解码库
    //avcodec_init();
    av_register_all();
        avcodec_register_all();


    /* find the video encoder */
    AVCodec *videoCodec = avcodec_find_encoder(CODEC_ID_H264);//得到264的编码器类
    if(!videoCodec)
    {
        printf("avcodec_find_decoder error
");
        return -1;
    }

    /*AVCodecParserContext *avParserContext = av_parser_init(CODEC_ID_H264);//得到解析帧类，主要用于后面的帧头查找
    if(!avParserContext)
    {
        printf("av_parser_init  error
");
        return -1;
    }*/
    AVCodecContext *codec_ = avcodec_alloc_context3(videoCodec);//编码会话层
    if(!codec_)
    {
        printf("avcodec_alloc_context3  error
");
        return -1;
    }


    //初始化参数，下面的参数应该由具体的业务决定
    codec_->time_base.num = 1;
        codec_->time_base.den = 25;//帧率
        codec_->gop_size = 1;
        codec_->max_b_frames = 1;
        codec_->thread_count = 1;
        codec_->pix_fmt = PIX_FMT_YUV420P;
    //codec_->frame_number = 1; //每包一个视频帧
    //codec_->codec_type = AVMEDIA_TYPE_VIDEO;
    codec_->bit_rate = 1000000;

    codec_->width = 720;//视频宽
    codec_->height = 576;//视频高

    if(avcodec_open2(codec_, videoCodec, NULL) < 0)//打开编码器
    {
        printf("avcodec_open2 error
");
        return -1;
    }


    FILE *myH264 = fopen("t.264", "wb");
    if(myH264 == NULL)
    {
        perror("cant open 264 file
");
        return -1;
    }

    FILE *yuvfile = fopen("my264.yuv", "rb");
    if(yuvfile == NULL)
    {
        perror("cant open YUV file
");
        return -1;
    }

    int readFileLen = 1;
    char readBuf[MAX_LEN];

    printf("readBuf address  is %x
", readBuf);

    //
    int outbuf_size=100000;
    unsigned char * outbuf= malloc(outbuf_size);
    int u_size=0;
    AVPacket avpkt;
    unsigned char * yuv_buf= malloc(720*576*3/2);
    AVFrame *m_pYUVFrame=malloc(sizeof(AVFrame));
    int flag=0;
    while(1)
    {
        int len = fread(yuv_buf,720*576*3/2,1,yuvfile);
        if(len<=0)
         {
             printf("read over
");
         break;
         }
         else
         {
             avpicture_fill((AVPicture*)m_pYUVFrame,(unsigned char *)yuv_buf,PIX_FMT_YUV420P,720,576);
             int got_packet_ptr =0;
             av_init_packet(&avpkt);
             avpkt.data=outbuf;
             avpkt.size=outbuf_size;
             while(1)
            {
               u_size = avcodec_encode_video(codec_,outbuf,outbuf_size,m_pYUVFrame);
               if(u_size>0 && u_size<100000)
           {
                    m_pYUVFrame->pts++;
                    fwrite(avpkt.data,1,u_size,myH264);
                    flag++;
                    break;
           }

            }
         }
        // if(flag>20)break;
    }
    avcodec_close(codec_);
    av_free(codec_);

    fclose(yuvfile);
    fclose(myH264);

}


</pre><br><br></pre>

版权声明：本文为博主原创文章，未经博主允许不得转载。