最简单的基于FFMPEG的推流器附件：收流器

#include

#define __STDC_CONSTANT_MACROS

#ifdef _WIN32

//Windows

extern "C"

{

#include "libavformat/avformat.h"

#include "libavutil/mathematics.h"

#include "libavutil/time.h"

};

#else

//Linux...

#ifdef __cplusplus

extern "C"

{

#endif

#include

#include

#include

#ifdef __cplusplus

};

#endif

#endif

//'1': Use H.264 Bitstream Filter

#define USE_H264BSF 0

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

{

AVOutputFormat *ofmt = NULL;

//Input AVFormatContext and Output AVFormatContext

AVFormatContext *ifmt_ctx = NULL, *ofmt_ctx = NULL;

AVPacket pkt;

const char *in_filename, *out_filename;

int ret, i;

int videoindex=-1;

int frame_index=0;

in_filename = "rtmp://live.hkstv.hk.lxdns.com/live/hks";

//in_filename = "rtp://233.233.233.233:6666";

//out_filename = "receive.ts";

//out_filename = "receive.mkv";

out_filename = "receive.flv";

av_register_all();

//Network

avformat_network_init();

//Input

if ((ret = avformat_open_input(&ifmt_ctx, in_filename, 0, 0)) < 0) {

printf( "Could not open input file.");

goto end;

}

if ((ret = avformat_find_stream_info(ifmt_ctx, 0)) < 0) {

printf( "Failed to retrieve input stream information");

goto end;

}

for(i=0; inb_streams; i++)

if(ifmt_ctx->streams[i]->codec->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); //RTMP

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 occurred 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, (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, (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==videoindex){

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_write_frame(ofmt_ctx, &pkt);

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 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;

}

return 0;

}