Ubuntu16.04中怎么安装ffmpeg

这期内容当中小编将会给大家带来有关Ubuntu16.04中怎么安装ffmpeg ，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。

一.ffmpeg安装

第一步：添加源。

sudo add-apt-repository ppa:djcj/hybrid

第二步：更新源。

sudo apt-get update

第三步：下载安装。

sudo apt-get install ffmpeg

第四步：验证。

sudo ffmpeg -version

二.C语言调用ffmpeg库实现rtsp视频流解析并存储为ppm格式图片

1.参考：

https://stackoverflow.com/questions/10715170/receiving-rtsp-stream-using-ffmpeg-library

2.代码：my_streamer.cpp

#include #include #include #include #include extern "C" {#include #include #include #include }int main(int argc, char** argv) {    // Open the initial context variables that are needed    SwsContext *img_convert_ctx;    AVFormatContext* format_ctx = avformat_alloc_context();    AVCodecContext* codec_ctx = NULL;    int video_stream_index;    // Register everything    av_register_all();    avformat_network_init();    //open RTSP    if (avformat_open_input(&format_ctx, "rtsp://134.169.178.187:8554/h364.3gp",            NULL, NULL) != 0) {        return EXIT_FAILURE;    }    if (avformat_find_stream_info(format_ctx, NULL) < 0) {        return EXIT_FAILURE;    }    //search video stream    for (int i = 0; i < format_ctx->nb_streams; i++) {        if (format_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO)            video_stream_index = i;    }    AVPacket packet;    av_init_packet(&packet);    //open output file    AVFormatContext* output_ctx = avformat_alloc_context();    AVStream* stream = NULL;    int cnt = 0;    //start reading packets from stream and write them to file    av_read_play(format_ctx);    //play RTSP    // Get the codec    AVCodec *codec = NULL;    codec = avcodec_find_decoder(AV_CODEC_ID_H264);    if (!codec) {        exit(1);    }    // Add this to allocate the context by codec    codec_ctx = avcodec_alloc_context3(codec);    avcodec_get_context_defaults3(codec_ctx, codec);    avcodec_copy_context(codec_ctx, format_ctx->streams[video_stream_index]->codec);    std::ofstream output_file;    if (avcodec_open2(codec_ctx, codec, NULL) < 0)        exit(1);    img_convert_ctx = sws_getContext(codec_ctx->width, codec_ctx->height,            codec_ctx->pix_fmt, codec_ctx->width, codec_ctx->height, AV_PIX_FMT_RGB24,            SWS_BICUBIC, NULL, NULL, NULL);    int size = avpicture_get_size(AV_PIX_FMT_YUV420P, codec_ctx->width,            codec_ctx->height);    uint8_t* picture_buffer = (uint8_t*) (av_malloc(size));    AVFrame* picture = av_frame_alloc();    AVFrame* picture_rgb = av_frame_alloc();    int size2 = avpicture_get_size(AV_PIX_FMT_RGB24, codec_ctx->width,            codec_ctx->height);    uint8_t* picture_buffer_2 = (uint8_t*) (av_malloc(size2));    avpicture_fill((AVPicture *) picture, picture_buffer, AV_PIX_FMT_YUV420P,            codec_ctx->width, codec_ctx->height);    avpicture_fill((AVPicture *) picture_rgb, picture_buffer_2, AV_PIX_FMT_RGB24,            codec_ctx->width, codec_ctx->height);    while (av_read_frame(format_ctx, &packet) >= 0 && cnt < 1000) { //read ~ 1000 frames        std::cout << "1 Frame: " << cnt << std::endl;        if (packet.stream_index == video_stream_index) {    //packet is video            std::cout << "2 Is Video" << std::endl;            if (stream == NULL) {    //create stream in file                std::cout << "3 create stream" << std::endl;                stream = avformat_new_stream(output_ctx,                        format_ctx->streams[video_stream_index]->codec->codec);                avcodec_copy_context(stream->codec,                        format_ctx->streams[video_stream_index]->codec);                stream->sample_aspect_ratio =                        format_ctx->streams[video_stream_index]->codec->sample_aspect_ratio;            }            int check = 0;            packet.stream_index = stream->id;            std::cout << "4 decoding" << std::endl;            int result = avcodec_decode_video2(codec_ctx, picture, &check, &packet);            std::cout << "Bytes decoded " << result << " check " << check                    << std::endl;            if (cnt > 100)    //cnt < 0)                    {                sws_scale(img_convert_ctx, picture->data, picture->linesize, 0,                        codec_ctx->height, picture_rgb->data, picture_rgb->linesize);                std::stringstream file_name;                file_name << "test" << cnt << ".ppm";                output_file.open(file_name.str().c_str());                output_file << "P3 " << codec_ctx->width << " " << codec_ctx->height                        << " 255\n";                for (int y = 0; y < codec_ctx->height; y++) {                    for (int x = 0; x < codec_ctx->width * 3; x++)                        output_file                                << (int) (picture_rgb->data[0]                                        + y * picture_rgb->linesize[0])[x] << " ";                }                output_file.close();            }            cnt++;        }        av_free_packet(&packet);        av_init_packet(&packet);    }    av_free(picture);    av_free(picture_rgb);    av_free(picture_buffer);    av_free(picture_buffer_2);    av_read_pause(format_ctx);    avio_close(output_ctx->pb);    avformat_free_context(output_ctx);    return (EXIT_SUCCESS);}

3.依赖库安装

apt install libavformat-devapt install libavcodec-devapt install libswresample-devapt install libswscale-devapt install libavutil-devsudo apt-get install libsdl1.2-devsudo apt-get install libsdl-image1.2-devsudo apt-get install libsdl-mixer1.2-devsudo apt-get install libsdl-ttf2.0-devsudo apt-get install libsdl-gfx1.2-dev

4.编译

g++ -w my_streamer.cpp -o my_streamer $(pkg-config --cflags --libs libavformat libswscale libavcodec libavutil)

5.运行

./my_streamer

三.C语言调用ffmpeg库实现rtsp视频流解析并存储为ppm或jpg格式图片，并通过opencv显示

1.代码：my_streamer.cpp

#include #include #include #include #include #include #include #include #include extern "C" {#include #include #include #include }static void CopyDate(AVFrame *pictureFrame,int width,int height,int time);//static void SaveFrame_mmp(AVFrame *pictureFrame, int width, int height, int iFrame);static void SaveFrame_jpg_uselibjpeg(AVFrame *pictureFrame, int width, int height, int iFrame);int main(int argc, char** argv) {    // Open the initial context variables that are needed    SwsContext *img_convert_ctx;    AVFormatContext* format_ctx = avformat_alloc_context();    AVCodecContext* codec_ctx = NULL;    int video_stream_index;    // Register everything    av_register_all();    avformat_network_init();    //open RTSP    if (avformat_open_input(&format_ctx, "rtsp://192.168.31.100:8656/main",            NULL, NULL) != 0) {        return EXIT_FAILURE;    }    if (avformat_find_stream_info(format_ctx, NULL) < 0) {        return EXIT_FAILURE;    }    //search video stream    for (int i = 0; i < format_ctx->nb_streams; i++) {        if (format_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO)            video_stream_index = i;    }    AVPacket packet;    av_init_packet(&packet);    //open output file    AVFormatContext* output_ctx = avformat_alloc_context();    AVStream* stream = NULL;    int cnt = 0;    //start reading packets from stream and write them to file    av_read_play(format_ctx);    //play RTSP    // Get the codec    AVCodec *codec = NULL;    codec = avcodec_find_decoder(AV_CODEC_ID_H264);    if (!codec) {        exit(1);    }    // Add this to allocate the context by codec    codec_ctx = avcodec_alloc_context3(codec);    avcodec_get_context_defaults3(codec_ctx, codec);    avcodec_copy_context(codec_ctx, format_ctx->streams[video_stream_index]->codec);    std::ofstream output_file;    if (avcodec_open2(codec_ctx, codec, NULL) < 0)        exit(1);    img_convert_ctx = sws_getContext(codec_ctx->width, codec_ctx->height,            codec_ctx->pix_fmt, codec_ctx->width, codec_ctx->height, AV_PIX_FMT_RGB24,            SWS_BICUBIC, NULL, NULL, NULL);    int size = avpicture_get_size(AV_PIX_FMT_YUV420P, codec_ctx->width,            codec_ctx->height);    uint8_t* picture_buffer = (uint8_t*) (av_malloc(size));    AVFrame* picture = av_frame_alloc();    AVFrame* picture_rgb = av_frame_alloc();    int size2 = avpicture_get_size(AV_PIX_FMT_RGB24, codec_ctx->width,            codec_ctx->height);    uint8_t* picture_buffer_2 = (uint8_t*) (av_malloc(size2));    avpicture_fill((AVPicture *) picture, picture_buffer, AV_PIX_FMT_YUV420P,            codec_ctx->width, codec_ctx->height);    avpicture_fill((AVPicture *) picture_rgb, picture_buffer_2, AV_PIX_FMT_RGB24,            codec_ctx->width, codec_ctx->height);    //geyg    AVFrame         *pictureRGB;    int             numBytes;    uint8_t         *buffer;    int             i=0;    long prepts = 0;    pictureRGB=avcodec_alloc_frame();    if(pictureRGB==NULL)        return -1;    // Determine required buffer size and allocate buffer    numBytes=avpicture_get_size(PIX_FMT_RGB24, codec_ctx->width,                        codec_ctx->height);    buffer=(uint8_t *)av_malloc(numBytes*sizeof(uint8_t));    // Assign appropriate parts of buffer to image planes in pFrameRGB    avpicture_fill((AVPicture *)pictureRGB, buffer, PIX_FMT_RGB24,                        codec_ctx->width, codec_ctx->height);    while (av_read_frame(format_ctx, &packet) >= 0 && cnt < 1000) { //read ~ 1000 frames        std::cout << "1 Frame: " << cnt << std::endl;        if (packet.stream_index == video_stream_index) {    //packet is video            std::cout << "2 Is Video" << std::endl;            if (stream == NULL) {    //create stream in file                std::cout << "3 create stream" << std::endl;                stream = avformat_new_stream(output_ctx,                        format_ctx->streams[video_stream_index]->codec->codec);                avcodec_copy_context(stream->codec,                        format_ctx->streams[video_stream_index]->codec);                stream->sample_aspect_ratio =                        format_ctx->streams[video_stream_index]->codec->sample_aspect_ratio;            }            int check = 0;            packet.stream_index = stream->id;            std::cout << "4 decoding" << std::endl;            int result = avcodec_decode_video2(codec_ctx, picture, &check, &packet);            std::cout << "Bytes decoded " << result << " check " << check                    << std::endl;            if(check!=0 && cnt > 100)            {                static struct SwsContext *img_convert_ctx;                // Convert the image into YUV format that SDL uses                if(img_convert_ctx == NULL) {                        int w = codec_ctx->width;                        int h = codec_ctx->height;                        img_convert_ctx = sws_getContext(w, h,                                codec_ctx->pix_fmt,                                w, h, PIX_FMT_RGB24, SWS_BICUBIC,                                NULL, NULL, NULL);                        if(img_convert_ctx == NULL) {                                fprintf(stderr, "Cannot initialize the conversion context!\n");                                exit(1);                        }                }                int ret = sws_scale(img_convert_ctx, picture->data, picture->linesize, 0,                        codec_ctx->height, pictureRGB->data, pictureRGB->linesize);                // Save the frame to disk                SaveFrame_jpg_uselibjpeg(pictureRGB, codec_ctx->width, codec_ctx->height, cnt);                CopyDate(pictureRGB, codec_ctx->width, codec_ctx->height,packet.pts-prepts);                prepts = packet.pts;             }/*            if (cnt > 100)    //cnt < 0)            {                sws_scale(img_convert_ctx, picture->data, picture->linesize, 0,                        codec_ctx->height, picture_rgb->data, picture_rgb->linesize);                std::stringstream file_name;                file_name << "test" << cnt << ".ppm";                output_file.open(file_name.str().c_str());                output_file << "P3 " << codec_ctx->width << " " << codec_ctx->height                        << " 255\n";                for (int y = 0; y < codec_ctx->height; y++) {                    for (int x = 0; x < codec_ctx->width * 3; x++)                        output_file                                << (int) (picture_rgb->data[0]                                        + y * picture_rgb->linesize[0])[x] << " ";                }                output_file.close();            }*/            cnt++;        }        av_free_packet(&packet);        av_init_packet(&packet);    }    av_free(picture);    av_free(picture_rgb);    av_free(picture_buffer);    av_free(picture_buffer_2);    av_read_pause(format_ctx);    avio_close(output_ctx->pb);    avformat_free_context(output_ctx);    return (EXIT_SUCCESS);}static void CopyDate(AVFrame *picture,int width,int height,int time){        if(time <=0 ) time = 1;        int             nChannels;        int             stepWidth;        uchar*  pData;        cv::Mat frameImage(cv::Size(width, height), CV_8UC3, cv::Scalar(0));        stepWidth = frameImage.step;        nChannels = frameImage.channels();        pData     = frameImage.data;        for(int i = 0; i < height; i++)        {                for(int j = 0; j < width; j++)                {                        pData[i*stepWidth+j*nChannels+0] = picture->data[0][i*picture->linesize[0]+j*nChannels+2];                        pData[i*stepWidth+j*nChannels+1] = picture->data[0][i*picture->linesize[0]+j*nChannels+1];                        pData[i*stepWidth+j*nChannels+2] = picture->data[0][i*picture->linesize[0]+j*nChannels+0];                }        }        cv::namedWindow("Video", cv::WINDOW_NORMAL);        cv::imshow("Video", frameImage);        cv::waitKey(1);}static void SaveFrame_mmp(AVFrame *picture, int width, int height, int iFrame){        FILE *pFile;        char szFilename[32];        int  y;        // Open file        sprintf(szFilename, "frame%d.ppm", iFrame);        pFile=fopen(szFilename, "wb");        if(pFile==NULL)        {                printf("%s\n","create file fail!");                return;        }        // Write header        fprintf(pFile, "P6\n%d %d\n255\n", width, height);        // Write pixel data        for(y=0; ydata[0]+y*picture->linesize[0], 1, width*3, pFile);        // Close file        fclose(pFile);}static void SaveFrame_jpg_uselibjpeg(AVFrame* pFrame, int width, int height, int iFrame){        char fname[128] = { 0 };        struct jpeg_compress_struct cinfo;        struct jpeg_error_mgr jerr;        JSAMPROW row_pointer[1];        int row_stride;        uint8_t *buffer;        FILE *fp;        buffer = pFrame->data[0];        sprintf(fname, "%s%d.jpg", "frame", iFrame);        fp = fopen(fname, "wb");        cinfo.err = jpeg_std_error(&jerr);        jpeg_create_compress(&cinfo);        jpeg_stdio_dest(&cinfo, fp);        cinfo.image_width = width;        cinfo.image_height = height;        cinfo.input_components = 3;        cinfo.in_color_space = JCS_RGB;        jpeg_set_defaults(&cinfo);        jpeg_set_quality(&cinfo, 80, true);        jpeg_start_compress(&cinfo, TRUE);        row_stride = width * 3;        while (cinfo.next_scanline < height)        {                row_pointer[0] = &buffer[cinfo.next_scanline * row_stride];                (void)jpeg_write_scanlines(&cinfo, row_pointer, 1);        }        jpeg_finish_compress(&cinfo);        fclose(fp);        jpeg_destroy_compress(&cinfo);        return;}

2.依赖库安装

1.安装opencv：用户显示2.apt install libavformat-devapt install libavcodec-devapt install libswresample-devapt install libswscale-devapt install libavutil-devapt install libjpeg-dev3.sudo apt-get install libsdl1.2-devsudo apt-get install libsdl-image1.2-devsudo apt-get install libsdl-mixer1.2-devsudo apt-get install libsdl-ttf2.0-devsudo apt-get install libsdl-gfx1.2-dev4.ubuntu下zmq安装（1）下载zmq：wget http://download.zeromq.org/zeromq-4.1.4.tar.gz  （可以将"4.1.4"改成当前最新版本编号）（2）解压：tar -zxvf zeromq-4.1.4.tar.gz（3）编译安装A.执行configure文件：./configure   出现错误：   configure: error: Package requirements (libsodium) were not met:   No package 'libsodium' found   解决方案：忽略这个库   ./configure --prefix=/home/ygy/zmq --without-libsodium（prefix中的路径是zmq存放的目录）B.编译：makeC.安装：make installD.配置环境变量 vi /etc/profile   export C_INCLUDE_PATH="$C_INCLUDE_PATH:/usr/local/include"   export CPLUS_INCLUDE_PATH="$CPLUS_INCLUDE_PATH:/usr/local/include"   export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:/usr/local/lib"   export LIBRARY_PATH="$LIBRARY_PATH:/usr/local/lib"C语言zmq使用引用：#include 

3.编译

g++ -w my_streamer.cpp -o my_streamer $(pkg-config --cflags --libs libavformat libswscale libavcodec libavutil opencv libjpeg libzmq)

4.运行

./my_streamer

四.C语言调用ffmpeg库实现本地视频播放

2.依赖库安装：见上节二.3

3.编译：

git clone https://github.com/mpenkov/ffmpeg-tutorial.gitcd ffmpeg-tutorialmake

4.运行：

./tutorial01.out  ×.avi

上述就是小编为大家分享的Ubuntu16.04中怎么安装ffmpeg 了，如果刚好有类似的疑惑，不妨参照上述分析进行理解。如果想知道更多相关知识，欢迎关注行业资讯频道。