ffmpeg4教程8:rtmp流保存flv

基于vs2017 vc++ ffmpeg4.0.2下测试

ffmpeg 环境配置请百度（vs2017 ffmpeg ）

部分方法在https://blog.csdn.net/Java_lilin/article/details/85118365中查找
头文件参考上篇

int main33333 ()
{
   AVOutputFormat *ofmt = NULL;
   //Input AVFormatContext and Output AVFormatContext
   AVFormatContext *ifmt_ctx = avformat_alloc_context(), *ofmt_ctx = NULL;
   AVPacket pkt;
   const char *in_filename, *out_filename;
   int ret, i;
   int videoindex = -1;
   int frame_index = 0;
   in_filename = "rtmp://192.168.0.108/live/a";//"rtmp://192.168.0.108/live/f";
   //in_filename = "rtp://233.233.233.233:6666";
   //out_filename = "receive.ts";
   //out_filename = "receive.mkv";
   out_filename = "C:\\Users\\lilin\\Desktop\\out.flv";

   //Network
   avformat_network_init();
   //av_dict_set(&options, "video_size","1920*1080",0);//大小默认全部
   cchaoshitime = av_gettime();//每次循环帧都要这个呢
   ifmt_ctx->interrupt_callback.callback = interrupt_test; //超时判断设置

   if ((ret = avformat_open_input(&ifmt_ctx, in_filename, 0, 0)) < 0) {
       printf("Could not open input file.");
       return -1;
   }

   if ((ret = avformat_find_stream_info(ifmt_ctx, 0)) < 0) {
       printf("Failed to retrieve input stream information");
       return -1;
   }

   for (i = 0; i < ifmt_ctx->nb_streams; i++) {
       if (ifmt_ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
           videoindex = i;
           break;
       }
   }
   av_dump_format(ifmt_ctx, 0, in_filename, 0);

   //Output
   avformat_alloc_output_context2(&ofmt_ctx, NULL, NULL, out_filename); //
   if (!ofmt_ctx) {
       printf("Could not create output context\n");
       return -1;
   }
   ofmt = ofmt_ctx->oformat;
   for (i = 0; i < ifmt_ctx->nb_streams; i++) {
       //Create output AVStream according to input AVStream
       AVStream *in_stream = ifmt_ctx->streams[i];
       AVCodec *incodec = avcodec_find_encoder(in_stream->codecpar->codec_id);
       if (!incodec) {
           printf("not found encoder 1 ");
           return -1;
       }
       AVStream *out_stream = avformat_new_stream(ofmt_ctx, incodec);
       if (!out_stream) {
           printf("Failed allocating output stream\n");
           ret = AVERROR_UNKNOWN;
           return -1;
       }
       //Copy the settings of AVCodecContext
       AVCodecContext *codec_ctx = avcodec_alloc_context3(incodec);
       ret = avcodec_parameters_to_context(codec_ctx, in_stream->codecpar);
       if (ret < 0) {
           printf("Failed to copy in_stream codecpar to codec context\n");
           return -1;
       }
       codec_ctx->codec_tag = 0;
       if (ofmt_ctx->oformat->flags & AVFMT_GLOBALHEADER)
           codec_ctx->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;

       ret = avcodec_parameters_from_context(out_stream->codecpar, codec_ctx);
       if (ret < 0) {
           printf("Failed to copy codec context to out_stream codecpar context\n");
       }

   }
   //Dump Format------------------
   av_dump_format(ofmt_ctx, 0, out_filename, 1);

   //Open output URL
   if (!(ofmt->flags & AVFMT_NOFILE)) {
       ret = avio_open(&ofmt_ctx->pb, out_filename, AVIO_FLAG_WRITE);
       if (ret < 0) {
           printf("Could not open output URL '%s'", out_filename);
           return -1;
       }
   }
   //Write file header
   ret = avformat_write_header(ofmt_ctx, NULL);
   if (ret < 0) {
       printf("Error occurred when opening output URL\n");
       return -1;
   }

//AVBitStreamFilterContext* h264bsfc = av_bitstream_filter_init("h264_mp4toannexb");

   while (1) {
       cchaoshitime = av_gettime();
       AVStream *in_stream, *out_stream;
       //Get an AVPacket
       ret = av_read_frame(ifmt_ctx, &pkt);

       if (ret < 0)
           break;

       in_stream = ifmt_ctx->streams[pkt.stream_index];
       out_stream = ofmt_ctx->streams[pkt.stream_index];
       //简化的时间帧计算非简化参考上pian
       av_packet_rescale_ts(&pkt, in_stream->time_base, out_stream->time_base);
       ret = av_interleaved_write_frame(ofmt_ctx, &pkt);

       if (ret < 0) {
           printf("Error muxing packet\n");
           break;
       }

       av_packet_unref(&pkt);
   }
   //Write file trailer
   av_write_trailer(ofmt_ctx);

   avformat_close_input(&ifmt_ctx);
   /* close output */
   if (ofmt_ctx && !(ofmt->flags & AVFMT_NOFILE)) {
       avio_close(ofmt_ctx->pb);
   }
   avformat_free_context(ofmt_ctx);
   if (ret < 0 && ret != AVERROR_EOF) {
       printf("Error occurred.\n");
       return -1;
   }

printf("ok1");
getchar();

return 0;
}

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ffmpeg4教程8:rtmp流保存flv

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