利用FFmpeg 将 rtsp 获取H264裸流并保存到文件中

既然已经可以通过 RTSP 获取h264 裸流了。那么通过 FFmpeg 将其保存到文件中怎么做呢？

一、首先RTSP获取 h264 裸流

我们上面两篇文章主要讲的是通过 rtsp://Your ip:554/stream_chn0.h265 播放H.265视频流。

PS：我刚试了一下，我的 FFmpeg 程序暂时不支持 h265 ...   之前编译的时候，只提供了 x264没有x265

如果感兴趣参看下面两篇文章添加。

参看：使用VS2015添加对ffmpeg添加h265 支持。

参看：ffmpeg 编码H265和H264对比

再结合之前讲的，FFmepg 再学习系列，应该是没问题的。不过好久没有弄了，早忘了了。

 

那现在没有可以播放的 H.264 视频流了啊，怎么办？

有办法之前讲过一篇文章，参看：LIVE555再学习 -- VLC搭建RTSP服务器（转） 用VLC搭建一个不就完了。

 

当然还可以直接用 live555，参看：LIVE555再学习 -- live555实现RTSP直播服务器  （推荐）

二、FFmpeg 将H.264 裸流保存到文件

这个也好说，之前有讲到，参看：FFmpeg再学习 -- SDL 环境搭建和视频显示

将其改改就可以了。

具体代码如下：

参看：利用ffmpeg将RTSP传输的h264原始码流保存到文件中

 

#include "stdafx.h"

#include

#define __STDC_CONSTANT_MACROS

#ifdef _WIN32
//Windows
extern "C"
{
#include "libavcodec/avcodec.h"
#include "libavformat/avformat.h"
#include "libswscale/swscale.h"
#include "SDL2/SDL.h"
};
#else
//Linux...
#ifdef __cplusplus
extern "C"
{
#endif
#include
#include
#include
#include
#ifdef __cplusplus
};
#endif
#endif

int main(int argc, char* argv[])
{

    AVFormatContext *pFormatCtx;
    int             i, videoindex;
    AVCodecContext  *pCodecCtx;
    AVCodec         *pCodec;
    AVFrame *pFrame, *pFrameYUV;
    uint8_t *out_buffer;
    AVPacket *packet;
    int ret, got_picture;


    struct SwsContext *img_convert_ctx;
    // 改成你自己的 URL
    char filepath[] = "rtsp://192.168.2.xx:8554/1";
    av_register_all();
    avformat_network_init();
    pFormatCtx = avformat_alloc_context();

    if (avformat_open_input(&pFormatCtx, filepath, NULL, NULL) != 0)打开网络流或文件流
    {
        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; inb_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 = (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);

    //Output Info---输出一些文件（RTSP）信息
    printf("---------------- File Information ---------------\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, PIX_FMT_YUV420P, SWS_BICUBIC, NULL, NULL, NULL);


    packet = (AVPacket *)av_malloc(sizeof(AVPacket));

    FILE *fpSave;
    if ((fpSave = fopen("geth264.h264", "ab")) == NULL) //h264保存的文件名
        return 0;
    for (;;)
    {
        //------------------------------
        if (av_read_frame(pFormatCtx, packet) >= 0)
        {
            if (packet->stream_index == videoindex)
            {
                fwrite(packet->data, 1, packet->size, fpSave);//写数据到文件中
            }
            av_free_packet(packet);
        }
    }


    //--------------
    av_frame_free(&pFrameYUV);
    av_frame_free(&pFrame);
    avcodec_close(pCodecCtx);
    avformat_close_input(&pFormatCtx);

    return 0;
}

 

 

调试结果显示如下：

生成 geth264.h264 文件，可播放。

三、工程下载

下载：利用FFmpeg 将 rtsp 获取H264裸流并保存到文件中 工程

思考，这里就有两个问题未完成，一个就是怎么将 H265的裸流保存到文件，再有怎么保存成其他格式比如MP4。

保存到MP4文件代码如下：

 

 
       
       #include "stdafx.h"   
       #ifdef __cplusplus   
       extern "C" {   
       #endif   
       #include    
       #include    
       #include    
       #include    
       #include    
       #include    
       #include    
       #include    
       #include    
       #include    
       #ifdef __cplusplus   
       }   
       #endif   
          
       AVFormatContext *i_fmt_ctx;   
       AVStream *i_video_stream;   
       AVFormatContext *o_fmt_ctx;   
       AVStream *o_video_stream;   
          
       int _tmain(int argc, char **argv)   
       {   
           avcodec_register_all();   
           av_register_all();   
           avformat_network_init();   
          
           /* should set to NULL so that avformat_open_input() allocate a new one */   
           i_fmt_ctx = NULL;   
           char rtspUrl[] = "rtsp://192.168.2.xx:8554/H264unicast";   
           const char *filename = "1.mp4";   
           if (avformat_open_input(&i_fmt_ctx, rtspUrl, NULL, NULL) != 0)   
           {   
               fprintf(stderr, "could not open input file\n");   
               return -1;   
           }   
          
           if (avformat_find_stream_info(i_fmt_ctx, NULL)<0)   
           {   
               fprintf(stderr, "could not find stream info\n");   
               return -1;   
           }   
          
           //av_dump_format(i_fmt_ctx, 0, argv[1], 0);   
          
           /* find first video stream */   
           for (unsigned i = 0; inb_streams; i++)   
           {   
               if (i_fmt_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO)   
               {   
                   i_video_stream = i_fmt_ctx->streams[i];   
                   break;   
               }   
           }   
           if (i_video_stream == NULL)   
           {   
               fprintf(stderr, "didn't find any video stream\n");   
               return -1;   
           }   
          
           avformat_alloc_output_context2(&o_fmt_ctx, NULL, NULL, filename);   
          
           /*  
           * since all input files are supposed to be identical (framerate, dimension, color format, ...)  
           * we can safely set output codec values from first input file  
           */   
           o_video_stream = avformat_new_stream(o_fmt_ctx, NULL);   
           {   
               AVCodecContext *c;   
               c = o_video_stream->codec;   
               c->bit_rate = 400000;   
               c->codec_id = i_video_stream->codec->codec_id;   
               c->codec_type = i_video_stream->codec->codec_type;   
               c->time_base.num = i_video_stream->time_base.num;   
               c->time_base.den = i_video_stream->time_base.den;   
               fprintf(stderr, "time_base.num = %d time_base.den = %d\n", c->time_base.num, c->time_base.den);   
               c->width = i_video_stream->codec->width;   
               c->height = i_video_stream->codec->height;   
               c->pix_fmt = i_video_stream->codec->pix_fmt;   
               printf("%d %d %d", c->width, c->height, c->pix_fmt);   
               c->flags = i_video_stream->codec->flags;   
               c->flags |= CODEC_FLAG_GLOBAL_HEADER;   
               c->me_range = i_video_stream->codec->me_range;   
               c->max_qdiff = i_video_stream->codec->max_qdiff;   
               c->qmin = i_video_stream->codec->qmin;   
               c->qmax = i_video_stream->codec->qmax;   
               c->qcompress = i_video_stream->codec->qcompress;   
           }   
          
           avio_open(&o_fmt_ctx->pb, filename, AVIO_FLAG_WRITE);   
           avformat_write_header(o_fmt_ctx, NULL);   
          
           int last_pts = 0;   
           int last_dts = 0;   
           int64_t pts, dts;   
           while (1)   
           {   
               AVPacket i_pkt;   
               av_init_packet(&i_pkt);   
               i_pkt.size = 0;   
               i_pkt.data = NULL;   
               if (av_read_frame(i_fmt_ctx, &i_pkt) <0)   
                   break;   
               /*  
               * pts and dts should increase monotonically  
               * pts should be >= dts  
               */   
               i_pkt.flags |= AV_PKT_FLAG_KEY;   
               pts = i_pkt.pts;   
               i_pkt.pts += last_pts;   
               dts = i_pkt.dts;   
               i_pkt.dts += last_dts;   
               i_pkt.stream_index = 0;   
          
               //printf("%lld %lld\n", i_pkt.pts, i_pkt.dts);   
               static int num = 1;   
               printf("frame %d\n", num++);   
               av_interleaved_write_frame(o_fmt_ctx, &i_pkt);   
               //av_free_packet(&i_pkt);   
               //av_init_packet(&i_pkt);   
           }   
           last_dts += dts;   
           last_pts += pts;   
           avformat_close_input(&i_fmt_ctx);   
           av_write_trailer(o_fmt_ctx);   
           avcodec_close(o_fmt_ctx->streams[0]->codec);   
           av_freep(&o_fmt_ctx->streams[0]->codec);   
           av_freep(&o_fmt_ctx->streams[0]);   
           avio_close(o_fmt_ctx->pb);   
           av_free(o_fmt_ctx);   
           return 0;   
       }
#include "stdafx.h"
#ifdef __cplusplus
extern "C" {
#endif
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#ifdef __cplusplus
}
#endif

AVFormatContext *i_fmt_ctx;
AVStream *i_video_stream;
AVFormatContext *o_fmt_ctx;
AVStream *o_video_stream;

int _tmain(int argc, char **argv)
{
    avcodec_register_all();
    av_register_all();
    avformat_network_init();

    /* should set to NULL so that avformat_open_input() allocate a new one */
    i_fmt_ctx = NULL;
    char rtspUrl[] = "rtsp://192.168.2.xx:8554/H264unicast";
    const char *filename = "1.mp4";
    if (avformat_open_input(&i_fmt_ctx, rtspUrl, NULL, NULL) != 0)
    {
        fprintf(stderr, "could not open input file\n");
        return -1;
    }

    if (avformat_find_stream_info(i_fmt_ctx, NULL)<0)
    {
        fprintf(stderr, "could not find stream info\n");
        return -1;
    }

    //av_dump_format(i_fmt_ctx, 0, argv[1], 0);

    /* find first video stream */
    for (unsigned i = 0; inb_streams; i++)
    {
        if (i_fmt_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
        {
            i_video_stream = i_fmt_ctx->streams[i];
            break;
        }
    }
    if (i_video_stream == NULL)
    {
        fprintf(stderr, "didn't find any video stream\n");
        return -1;
    }

    avformat_alloc_output_context2(&o_fmt_ctx, NULL, NULL, filename);

    /*
    * since all input files are supposed to be identical (framerate, dimension, color format, ...)
    * we can safely set output codec values from first input file
    */
    o_video_stream = avformat_new_stream(o_fmt_ctx, NULL);
    {
        AVCodecContext *c;
        c = o_video_stream->codec;
        c->bit_rate = 400000;
        c->codec_id = i_video_stream->codec->codec_id;
        c->codec_type = i_video_stream->codec->codec_type;
        c->time_base.num = i_video_stream->time_base.num;
        c->time_base.den = i_video_stream->time_base.den;
        fprintf(stderr, "time_base.num = %d time_base.den = %d\n", c->time_base.num, c->time_base.den);
        c->width = i_video_stream->codec->width;
        c->height = i_video_stream->codec->height;
        c->pix_fmt = i_video_stream->codec->pix_fmt;
        printf("%d %d %d", c->width, c->height, c->pix_fmt);
        c->flags = i_video_stream->codec->flags;
        c->flags |= CODEC_FLAG_GLOBAL_HEADER;
        c->me_range = i_video_stream->codec->me_range;
        c->max_qdiff = i_video_stream->codec->max_qdiff;
        c->qmin = i_video_stream->codec->qmin;
        c->qmax = i_video_stream->codec->qmax;
        c->qcompress = i_video_stream->codec->qcompress;
    }

    avio_open(&o_fmt_ctx->pb, filename, AVIO_FLAG_WRITE);
    avformat_write_header(o_fmt_ctx, NULL);

    int last_pts = 0;
    int last_dts = 0;
    int64_t pts, dts;
    while (1)
    {
        AVPacket i_pkt;
        av_init_packet(&i_pkt);
        i_pkt.size = 0;
        i_pkt.data = NULL;
        if (av_read_frame(i_fmt_ctx, &i_pkt) <0)
            break;
        /*
        * pts and dts should increase monotonically
        * pts should be >= dts
        */
        i_pkt.flags |= AV_PKT_FLAG_KEY;
        pts = i_pkt.pts;
        i_pkt.pts += last_pts;
        dts = i_pkt.dts;
        i_pkt.dts += last_dts;
        i_pkt.stream_index = 0;

        //printf("%lld %lld\n", i_pkt.pts, i_pkt.dts);
        static int num = 1;
        printf("frame %d\n", num++);
        av_interleaved_write_frame(o_fmt_ctx, &i_pkt);
        //av_free_packet(&i_pkt);
        //av_init_packet(&i_pkt);
    }
    last_dts += dts;
    last_pts += pts;
    avformat_close_input(&i_fmt_ctx);
    av_write_trailer(o_fmt_ctx);
    avcodec_close(o_fmt_ctx->streams[0]->codec);
    av_freep(&o_fmt_ctx->streams[0]->codec);
    av_freep(&o_fmt_ctx->streams[0]);
    avio_close(o_fmt_ctx->pb);
    av_free(o_fmt_ctx);
    return 0;
}

转载于:https://www.cnblogs.com/zhengAloha/p/8655588.html