手机端网站建设广告词,seo排名工具有哪些,电影网站织梦模版,温州网站提升排名最终解码效果: 1.UI设计 2.在控件属性窗口中输入默认值 3.复制已编译FFmpeg库到工程同级目录下 4.在工程引用FFmpeg库及头文件 5.链接指定FFmpeg库 6.使用FFmpeg库
引用头文件
extern C
{
#include libswscale/swscale.h
#include libavdevic…最终解码效果: 1.UI设计 2.在控件属性窗口中输入默认值 3.复制已编译FFmpeg库到工程同级目录下 4.在工程引用FFmpeg库及头文件 5.链接指定FFmpeg库 6.使用FFmpeg库
引用头文件
extern C
{
#include libswscale/swscale.h
#include libavdevice/avdevice.h
#include libavcodec/avcodec.h
#include libavcodec/bsf.h
#include libavformat/avformat.h
#include libavutil/avutil.h
#include libavutil/imgutils.h
#include libavutil/log.h
#include libavutil/imgutils.h
#include libavutil/time.h
#include libswresample/swresample.h}
创建视频编解码管理类 实现视频编解码管理类
#include ffmpegmananger.h
#include QThread
ffmpegMananger::ffmpegMananger(QObject *parent ):QObject(parent)
{m_pInFmtCtx nullptr;m_pTsFmtCtx nullptr;m_qstrRtspURL ;m_qstrOutPutFile ;
}
ffmpegMananger::~ffmpegMananger()
{avformat_free_context(m_pInFmtCtx);avformat_free_context(m_pTsFmtCtx);
}void ffmpegMananger::getRtspURL(QString strRtspURL)
{this-m_qstrRtspURL strRtspURL;
}
void ffmpegMananger::getOutURL(QString strRute)
{this-m_qstrOutPutFile strRute;printf(%s\n,m_qstrOutPutFile.toStdString().c_str());
}
void ffmpegMananger::setOutputCtx(AVCodecContext *encCtx, AVFormatContext **pTsFmtCtx,int nVideoIdx_out)
{avformat_alloc_output_context2(pTsFmtCtx , nullptr, nullptr, m_qstrOutPutFile.toStdString().c_str());if (!pTsFmtCtx ) {printf(Could not create output context\n);return;}if (avio_open(((*pTsFmtCtx)-pb), m_qstrOutPutFile.toStdString().c_str(), AVIO_FLAG_READ_WRITE) 0){avformat_free_context(*pTsFmtCtx);printf(avio_open fail.);return;}AVStream *out_stream avformat_new_stream(*pTsFmtCtx, encCtx-codec);nVideoIdx_out out_stream-index;//nVideoIdx_out out_stream-index;avcodec_parameters_from_context(out_stream-codecpar, encCtx);printf(Output Information\n);av_dump_format(*pTsFmtCtx, 0, m_qstrOutPutFile.toStdString().c_str(), 1);printf(\n);
}
int ffmpegMananger::ffmepgInput()
{int nRet 0;AVCodecContext *encCtx nullptr;//编码器//const char *pUrl D:/videos/264.dat;std::string temp m_qstrRtspURL.toStdString();const char *pUrl temp.c_str();printf(%s\n,pUrl);AVDictionary *options nullptr;av_dict_set(options,rtsp_transport, tcp, 0);av_dict_set(options,stimeout,10000000,0);// 设置“buffer_size”缓存容量av_dict_set(options, buffer_size, 1024000, 0);nRet avformat_open_input(m_pInFmtCtx,pUrl,nullptr,options);if( nRet 0){printf(Could not open input file,keep trying \n);return nRet;}avformat_find_stream_info(m_pInFmtCtx, nullptr);printf(Input Information\n);av_dump_format(m_pInFmtCtx, 0, pUrl, 0);printf(\n);//1.获取视频流编号int nVideo_indx av_find_best_stream(m_pInFmtCtx,AVMEDIA_TYPE_VIDEO,-1,-1,nullptr,0);if(nVideo_indx 0){avformat_free_context(m_pInFmtCtx);printf(查找解码器失败\n);return -1;}//2.查找解码器AVCodec *pInCodec avcodec_find_decoder(m_pInFmtCtx-streams[nVideo_indx]-codecpar-codec_id);if(nullptr pInCodec){printf(avcodec_find_decoder fail.);return -1;}//获取解码器上下文AVCodecContext* pInCodecCtx avcodec_alloc_context3(pInCodec);//复制解码器参数nRet avcodec_parameters_to_context(pInCodecCtx, m_pInFmtCtx-streams[nVideo_indx]-codecpar);if(nRet 0){avcodec_free_context(pInCodecCtx);printf(avcodec_parameters_to_context fail.);return -1;}//打开解码器if(avcodec_open2(pInCodecCtx, pInCodec, nullptr) 0){avcodec_free_context(pInCodecCtx);printf(Error: Cant open codec!\n);return -1;}printf(width %d\n, pInCodecCtx-width);printf(height %d\n, pInCodecCtx-height);int frame_index 0;int got_picture 0;AVStream *in_stream nullptr;AVStream *out_stream nullptr;AVFrame *pFrame av_frame_alloc();AVPacket *newpkt av_packet_alloc();AVPacket *packet av_packet_alloc();av_init_packet(newpkt);av_init_packet(packet);// alloc AVFrameAVFrame*pFrameRGB av_frame_alloc();// 图像色彩空间转换、分辨率缩放、前后图像滤波处理SwsContext *m_SwsContext sws_getContext(pInCodecCtx-width, pInCodecCtx-height,pInCodecCtx-pix_fmt, pInCodecCtx-width, pInCodecCtx-height,AV_PIX_FMT_RGB32, SWS_BICUBIC, nullptr, nullptr, nullptr);int bytes av_image_get_buffer_size(AV_PIX_FMT_RGB32, pInCodecCtx-width, pInCodecCtx-height,4);uint8_t *m_OutBuffer (uint8_t *)av_malloc(bytes * sizeof(uint8_t));// 将分配的内存空间给pFrameRGB使用avpicture_fill((AVPicture *)pFrameRGB, m_OutBuffer, AV_PIX_FMT_RGB32, pInCodecCtx-width, pInCodecCtx-height);if(encCtx nullptr){//打开编码器openEncoder(pInCodecCtx-width, pInCodecCtx-height,encCtx);}int videoindex_out 0;//设置输出文件上下文setOutputCtx(encCtx,m_pTsFmtCtx,videoindex_out);//Write file headerif (avformat_write_header(m_pTsFmtCtx, nullptr) 0){avformat_free_context(m_pTsFmtCtx);printf(Error occurred when opening output file\n);return -1;}printf(writer trail.\n);int count 0;nRet 0;while(av_read_frame(m_pInFmtCtx, packet) 0)//从pInFmtCtx读H264数据到packet{if(packet-stream_index ! nVideo_indx)//仅保留图像{continue;}if(avcodec_send_packet(pInCodecCtx, packet)0)//送packet中H264数据给解码器码器进行解码解码好的YUV数据放在pInCodecCtx,{break;}av_packet_unref(packet);got_picture avcodec_receive_frame(pInCodecCtx, pFrame);//把解码好的YUV数据放到pFrame中if(0 got_picture)//解码好一帧数据{//发送显示图像的信号// 对解码视频帧进行缩放、格式转换等操作sws_scale(m_SwsContext, (uint8_t const * const *)pFrame-data,pFrame-linesize, 0, pInCodecCtx-height,pFrameRGB-data, pFrameRGB-linesize);// 转换到QImageQImage tmmImage((uchar *)m_OutBuffer, pInCodecCtx-width, pInCodecCtx-height, QImage::Format_RGB32);QImage image tmmImage.copy();// 发送QImageemit Sig_GetOneFrame(image);setDecoderPts(newpkt-stream_index,count, pFrame);count;//送原始数据给编码器进行编码nRet avcodec_send_frame(encCtx,pFrame);if(nRet 0){continue;}//从编码器获取编号的数据while(nRet 0){nRet avcodec_receive_packet(encCtx,newpkt);if(nRet 0){break;}setEncoderPts(nVideo_indx,frame_index,videoindex_out,newpkt);int _count 1;printf(Write %d Packet. size:%5d\tpts:%lld\n, _count,newpkt-size, newpkt-pts);if (av_interleaved_write_frame(m_pTsFmtCtx, newpkt) 0){printf(Error muxing packet\n);goto end;}_count;av_packet_unref(newpkt);}}}while(1)//从pInFmtCtx读H264数据到packet{if(packet-stream_index ! nVideo_indx)//仅保留图像{continue;}if(avcodec_send_packet(pInCodecCtx, packet)0)//送packet中H264数据给解码器码器进行解码解码好的YUV数据放在pInCodecCtx,{continue;}av_packet_unref(packet);got_picture avcodec_receive_frame(pInCodecCtx, pFrame);//把解码好的YUV数据放到pFrame中if(!got_picture)//解码好一帧数据{AVRational in_time_base1 in_stream-time_base;in_stream m_pInFmtCtx-streams[newpkt-stream_index];//Duration between 2 frames (us)int64_t in_duration (double)AV_TIME_BASE / av_q2d(in_stream-r_frame_rate);pFrame-pts (double)(count*in_duration) / (double)(av_q2d(in_time_base1)*AV_TIME_BASE);count;//送原始数据给编码器进行编码nRet avcodec_send_frame(encCtx,pFrame);if(nRet 0){break;}//从编码器获取编号的数据while(nRet 0){nRet avcodec_receive_packet(encCtx,newpkt);if(nRet 0){continue;}in_stream m_pInFmtCtx-streams[newpkt-stream_index];out_stream m_pTsFmtCtx-streams[videoindex_out];if (newpkt-stream_index nVideo_indx){//FIXNo PTS (Example: Raw H.264)//Simple Write PTSif (newpkt-pts AV_NOPTS_VALUE){//Write PTSAVRational time_base1 in_stream-time_base;//Duration between 2 frames (us)int64_t calc_duration (double)AV_TIME_BASE / av_q2d(in_stream-r_frame_rate);//Parametersnewpkt-pts (double)(frame_index*calc_duration) / (double)(av_q2d(time_base1)*AV_TIME_BASE);newpkt-dts newpkt-pts;newpkt-duration (double)calc_duration / (double)(av_q2d(time_base1)*AV_TIME_BASE);frame_index;}}//Convert PTS/DTSnewpkt-pts av_rescale_q_rnd(newpkt-pts, in_stream-time_base, out_stream-time_base, (AVRounding)(AV_ROUND_NEAR_INF | AV_ROUND_PASS_MINMAX));newpkt-dts av_rescale_q_rnd(newpkt-dts, in_stream-time_base, out_stream-time_base, (AVRounding)(AV_ROUND_NEAR_INF | AV_ROUND_PASS_MINMAX));newpkt-duration av_rescale_q(newpkt-duration, in_stream-time_base, out_stream-time_base);newpkt-pos -1;newpkt-stream_index videoindex_out;int count 1;printf(Write %d Packet. size:%5d\tpts:%lld\n, count,newpkt-size, newpkt-pts);if (av_interleaved_write_frame(m_pTsFmtCtx, newpkt) 0){printf(Error muxing packet\n);goto end;}count;av_packet_unref(newpkt);}}}//Write file trailerav_write_trailer(m_pTsFmtCtx);
end:av_frame_free(pFrame);av_frame_free(pFrameRGB);av_packet_unref(newpkt);av_packet_unref(packet);std::coutrtsps h264 to ts end; return 0;
}
void ffmpegMananger::setDecoderPts(int idx,int count,AVFrame *pFrame)
{AVStream* in_stream m_pInFmtCtx-streams[idx];AVRational in_time_base1 in_stream-time_base;//Duration between 2 frames (us)int64_t in_duration (double)AV_TIME_BASE / av_q2d(in_stream-r_frame_rate);pFrame-pts (double)(count*in_duration) / (double)(av_q2d(in_time_base1)*AV_TIME_BASE);
}
void ffmpegMananger::setEncoderPts(int nVideo_indx,int frame_index,int videoindex_out,AVPacket *newpkt)
{AVStream*in_stream m_pInFmtCtx-streams[newpkt-stream_index];AVStream*out_stream m_pTsFmtCtx-streams[videoindex_out];if (newpkt-stream_index nVideo_indx){//FIXNo PTS (Example: Raw H.264)//Simple Write PTSif (newpkt-pts AV_NOPTS_VALUE){//Write PTSAVRational time_base1 in_stream-time_base;//Duration between 2 frames (us)int64_t calc_duration (double)AV_TIME_BASE / av_q2d(in_stream-r_frame_rate);//Parametersnewpkt-pts (double)(frame_index*calc_duration) / (double)(av_q2d(time_base1)*AV_TIME_BASE);newpkt-dts newpkt-pts;newpkt-duration (double)calc_duration / (double)(av_q2d(time_base1)*AV_TIME_BASE);frame_index;}}//Convert PTS/DTSnewpkt-pts av_rescale_q_rnd(newpkt-pts, in_stream-time_base, out_stream-time_base, (AVRounding)(AV_ROUND_NEAR_INF | AV_ROUND_PASS_MINMAX));newpkt-dts av_rescale_q_rnd(newpkt-dts, in_stream-time_base, out_stream-time_base, (AVRounding)(AV_ROUND_NEAR_INF | AV_ROUND_PASS_MINMAX));newpkt-duration av_rescale_q(newpkt-duration, in_stream-time_base, out_stream-time_base);newpkt-pos -1;newpkt-stream_index videoindex_out;
}
void ffmpegMananger::writeTail()
{//Write file trailerav_write_trailer(m_pTsFmtCtx);
}
void ffmpegMananger::openEncoder(int width, int height, AVCodecContext** enc_ctx)
{//使用libx264编码器AVCodec * pCodec avcodec_find_encoder_by_name(libx264);if(nullptr pCodec){printf(avcodec_find_encoder_by_name fail.\n);return;}//获取编码器上下文*enc_ctx avcodec_alloc_context3(pCodec);if(nullptr enc_ctx){printf(avcodec_alloc_context3(pCodec) fail.\n);return;}//sps/pps(*enc_ctx)-profile FF_PROFILE_H264_MAIN;(*enc_ctx)-level 30;//表示level是5.0//分辨率(*enc_ctx)-width width;(*enc_ctx)-height height;//gop(*enc_ctx)-gop_size 25;//i帧间隔(*enc_ctx)-keyint_min 20;//设置最小自动插入i帧的间隔.OPTION//B帧(*enc_ctx)-max_b_frames 0;//不要B帧(*enc_ctx)-has_b_frames 0;////参考帧(*enc_ctx)-refs 3;//OPTION//设置输入的yuv格式(*enc_ctx)-pix_fmt AV_PIX_FMT_YUV420P;//设置码率(*enc_ctx)-bit_rate 3000000;//设置帧率//(*enc_ctx)-time_base (AVRational){1,25};//帧与帧之间的间隔(*enc_ctx)-time_base.num 1;(*enc_ctx)-time_base.den 25;//(*enc_ctx)-framerate (AVRational){25,1};//帧率 25帧每秒(*enc_ctx)-framerate.num 25;(*enc_ctx)-framerate.den 1;if(avcodec_open2((*enc_ctx),pCodec,nullptr) 0){printf(avcodec_open2 fail.\n);}return;
}
