王纲保存网络文件到本地
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#ifndef PCH_H #define PCH_H extern "C" { #include "libavutil/opt.h" #include "libavutil/channel_layout.h" #include "libavutil/common.h" #include "libavutil/imgutils.h" #include "libavutil/mathematics.h" #include "libavutil/samplefmt.h" #include "libavutil/time.h" #include "libavutil/fifo.h" #include "libavcodec/avcodec.h" #include "libavformat/avformat.h" #include "libavformat/avio.h" //#include "libavfilter/avfiltergraph.h" #include "libavfilter/avfilter.h" #include "libavfilter/buffersink.h" #include "libavfilter/buffersrc.h" #include "libswscale/swscale.h" #include "libswresample/swresample.h" } #endif
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// CGaveFile.cpp : 定义控制台应用程序的入口点。 // /* Copyright [c] 2017-2027 By www.chungen90.com Allrights Reserved This file give a simple example of how to save net stream to local file. Any questions, you can join QQ group for help, QQ Group number: 766718184 or 127903734. */ #include "pch.h" #include <string> #include <memory> #include <thread> #include <iostream> using namespace std; AVFormatContext *inputContext = nullptr; AVFormatContext * outputContext; int64_t lastReadPacktTime ; static int interrupt_cb(void *ctx) { int timeout = 3; if(av_gettime() - lastReadPacktTime > timeout *1000 *1000) { return -1; } return 0; } int OpenInput(string inputUrl) { inputContext = avformat_alloc_context(); lastReadPacktTime = av_gettime(); inputContext->interrupt_callback.callback = interrupt_cb; int ret = avformat_open_input(&inputContext, inputUrl.c_str(), nullptr,nullptr); if(ret < 0) { av_log(NULL, AV_LOG_ERROR, "Input file open input failed\n"); return ret; } ret = avformat_find_stream_info(inputContext,nullptr); if(ret < 0) { av_log(NULL, AV_LOG_ERROR, "Find input file stream inform failed\n"); } else { av_log(NULL, AV_LOG_FATAL, "Open input file %s success\n",inputUrl.c_str()); } return ret; } shared_ptr<AVPacket> ReadPacketFromSource() { shared_ptr<AVPacket> packet(static_cast<AVPacket*>(av_malloc(sizeof(AVPacket))), [&](AVPacket *p) { av_packet_free(&p); av_freep(&p);}); av_init_packet(packet.get()); lastReadPacktTime = av_gettime(); int ret = av_read_frame(inputContext, packet.get()); if(ret >= 0) { return packet; } else { return nullptr; } } void av_packet_rescale_ts(AVPacket *pkt, AVRational src_tb, AVRational dst_tb) { if (pkt->pts != AV_NOPTS_VALUE) pkt->pts = av_rescale_q(pkt->pts, src_tb, dst_tb); if (pkt->dts != AV_NOPTS_VALUE) pkt->dts = av_rescale_q(pkt->dts, src_tb, dst_tb); if (pkt->duration > 0) pkt->duration = av_rescale_q(pkt->duration, src_tb, dst_tb); } int WritePacket(shared_ptr<AVPacket> packet) { auto inputStream = inputContext->streams[packet->stream_index]; auto outputStream = outputContext->streams[packet->stream_index]; av_packet_rescale_ts(packet.get(),inputStream->time_base,outputStream->time_base); return av_interleaved_write_frame(outputContext, packet.get()); } int OpenOutput(string outUrl) { int ret = avformat_alloc_output_context2(&outputContext, nullptr, "mpegts", outUrl.c_str()); if(ret < 0) { av_log(NULL, AV_LOG_ERROR, "open output context failed\n"); goto Error; } ret = avio_open2(&outputContext->pb, outUrl.c_str(), AVIO_FLAG_WRITE,nullptr, nullptr); if(ret < 0) { av_log(NULL, AV_LOG_ERROR, "open avio failed"); goto Error; } AVCodec * picCodec; for(int i = 0; i < inputContext->nb_streams; i++) { //AVStream * stream = avformat_new_stream(outputContext, inputContext->streams[i]->codec->codec); picCodec = avcodec_find_encoder(inputContext->streams[i]->codec->codec_id); AVStream * stream = avformat_new_stream(outputContext, picCodec); ret = avcodec_copy_context(stream->codec, inputContext->streams[i]->codec); if(ret < 0) { av_log(NULL, AV_LOG_ERROR, "copy coddec context failed"); goto Error; } } ret = avformat_write_header(outputContext, nullptr); if(ret < 0) { av_log(NULL, AV_LOG_ERROR, "format write header failed"); goto Error; } av_log(NULL, AV_LOG_FATAL, " Open output file success %s\n",outUrl.c_str()); return ret ; Error: if(outputContext) { for(int i = 0; i < outputContext->nb_streams; i++) { avcodec_close(outputContext->streams[i]->codec); } avformat_close_input(&outputContext); } return ret ; } void CloseInput() { if(inputContext != nullptr) { avformat_close_input(&inputContext); } } void CloseOutput() { if(outputContext != nullptr) { for(int i = 0 ; i < outputContext->nb_streams; i++) { AVCodecContext *codecContext = outputContext->streams[i]->codec; avcodec_close(codecContext); } avformat_close_input(&outputContext); } } void Init() { av_register_all(); avfilter_register_all(); avformat_network_init(); av_log_set_level(AV_LOG_ERROR); } int main(int argc, char* argv[]) { Init(); int ret = OpenInput("rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mov"); //int ret = OpenInput("http://183.207.249.14/PLTV/3/224/3221225567/index.m3u8"); if(ret >= 0) { ret = OpenOutput("D:\\test1.ts"); } if(ret <0) goto Error; while(true) { auto packet = ReadPacketFromSource(); if(packet) { ret = WritePacket(packet); if(ret >= 0) { cout<<"WritePacket Success!"<<endl; } else { cout<<"WritePacket failed!"<<endl; } } else { break; } } Error: CloseInput(); CloseOutput(); while(true) { this_thread::sleep_for(chrono::seconds(100)); } return 0; }