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recordIPC.c
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recordIPC.c
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#include<stdio.h>
#define __STDC_CONSTANT_MACROS
#ifdef __cplusplus
extern "C"
{
#endif
#include<libavformat/avformat.h>
#include<libavutil/mathematics.h>
#include<libavutil/time.h>
#ifdef __cplusplus
}
#endif
#define USE_H264BSF 0
int main(int argc,char **argv)
{
AVOutputFormat *ofmt = NULL;
AVFormatContext *ifmt_ctx = NULL,*ofmt_ctx = NULL;
AVPacket pkt;
const char *in_filename,*out_filename;
int ret,i;
int video_index=-1;
int frame_index=0;
in_filename="rtsp://192.168.1.138:8554/ch1";
out_filename="receive.flv";
av_register_all();
avformat_network_init();
if((ret=avformat_open_input(&ifmt_ctx,in_filename,0,0))<0)
{
printf("Could not open input file.\n");
goto end;
}
if((ret=avformat_find_stream_info(ifmt_ctx,0))<0)
{
printf("Failed to retrieve input stream information\n");
goto end;
}
for(i=0;i<ifmt_ctx->nb_streams;i++)
if(ifmt_ctx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO)
{
video_index=i;
break;
}
av_dump_format(ifmt_ctx,0,in_filename,0);
//output
//avformat_alloc_output_context2(&ofmt_ctx,NULL,NULL,out_filename);
int temp_ret;
//temp_ret = avformat_alloc_output_context2(&ofmt_ctx,NULL,NULL,out_filename);
//avformat_alloc_output_context2(&ofmt_ctx,NULL,/*"mpeg"*/"flv",out_filename);
avformat_alloc_output_context2(&ofmt_ctx,NULL,NULL,out_filename);
//printf("%d\n",temp_ret);
if(!ofmt_ctx)
{
printf("Could not create output context\n");
ret=AVERROR_UNKNOWN;
goto end;
}
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];
AVStream *out_stream = avformat_new_stream(ofmt_ctx,in_stream->codec->codec);
if(!out_stream)
{
printf("Failed allocating output stream.\n");
ret = AVERROR_UNKNOWN;
goto end;
}
//Copy the settings of AVCodecContext
ret = avcodec_copy_context(out_stream->codec,in_stream->codec);
if(ret<0)
{
printf("Failed to copy context from input to output stream codec context\n");
goto end;
}
out_stream->codec->codec_tag = 0;
if(ofmt_ctx->oformat->flags & AVFMT_GLOBALHEADER)
out_stream->codec->flags |= CODEC_FLAG_GLOBAL_HEADER;
}
//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);
goto end;
}
}
//write file header
ret = avformat_write_header(ofmt_ctx,NULL);
if(ret < 0)
{
printf("Error occured when opening output URL\n");
goto end;
}
#if USE_H264BSF
AVBitStreamFilterContext *h264bsfc = av_bitstream_filter_init("h264_mp4toannexb");
#endif
while(1)
{
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];
//copy packet
//convert PTS/DTS
pkt.pts = av_rescale_q_rnd(pkt.pts,in_stream->time_base,out_stream->time_base,(enum AVRounding)(AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX));
pkt.dts = av_rescale_q_rnd(pkt.dts, in_stream->time_base, out_stream->time_base, (enum AVRounding)(AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX));
pkt.duration = av_rescale_q(pkt.duration, in_stream->time_base, out_stream->time_base);
pkt.pos = -1;
//Print to Screen
if(pkt.stream_index==video_index)
{
printf("Receive %8d video frames from input URL\n",frame_index);
frame_index++;
#if USE_H264BSF
av_bitstream_filter_filter(h264bsfc, in_stream->codec, NULL, &pkt.data, &pkt.size, pkt.data, pkt.size, 0);
#endif
}
ret = av_interleaved_write_frame(ofmt_ctx,&pkt);
if(ret < 0)
{
printf("Error muxing packet\n");
break;
}
av_free_packet(&pkt);
}
#if USE_H264BSF
av_bitstream_filter_close(h264bsfc);
#endif
//Write file trailer
av_write_trailer(ofmt_ctx);
end:
avformat_close_input(&ifmt_ctx);
//Close input
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 occured.\n");
return -1;
}
return 0;
}