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  • LibVLC DXVA2 Windows C++ Hardware Acceleration

    15 novembre 2016, par Sergiu Vlad

    I want to decode a h264 RTSP stream using DXVA2 Accelerated decoder. In VLC it does work but in my code have the following output :

    avcodec generic warning: threaded frame decoding is not compatible with DXVA2, disabled
    avcodec generic debug: available hardware decoder output format 61 (dxva2_vld)
    avcodec generic debug: available hardware decoder output format 128 (d3d11va_vld)
    avcodec generic debug: available software decoder output format 12 (yuvj420p)
    core generic debug: looking for hw decoder module matching "any": 1 candidates
    core generic debug: no hw decoder modules matched

    Is this a problem with NV12 conversion ? Is there a way to force DXVA2 ?

    Thanks

    CODE :

       #include
    #include
    #include
    #include
    #include
    #include <iostream>

    #include
    #include <ctime>
    #include <vlc></vlc>vlc.h>

    // RTSP address
    const char* rtspAddress = "rtsp://admin:admin@192.168.0.245/live_st1";
    // Video resolution WxH
    cv::Size rtspRes(1920, 1080);

    struct VideoDataStruct
    {
       int param;
    };

    int done = 0;
    libvlc_media_player_t *mp;
    unsigned int videoBufferSize = 0;
    uint8_t *videoBuffer = 0;

    void cbVideoPrerender(void *p_video_data, uint8_t **pp_pixel_buffer, int size)
    {
       if (size > videoBufferSize || !videoBuffer)
       {
           printf("Reallocate raw video buffer %d bytes\n", size);
           free(videoBuffer);
           videoBuffer = (uint8_t *)malloc(size);
           videoBufferSize = size;
       }

       // videoBuffer = (uint8_t *)malloc(size);
       *pp_pixel_buffer = videoBuffer;
    }
    void cbVideoPostrender(void *p_video_data, uint8_t *p_pixel_buffer, int width, int height, int pixel_pitch, int size, int64_t pts)
    {
       // Unlocking
       //CloseHandle(hMutex);

    }

    //static void handleEvent(const libvlc_event_t* pEvt, void* pUserData)
    //{
    //    libvlc_time_t time;
    //    switch (pEvt->type)
    //    {
    //    case libvlc_MediaPlayerTimeChanged:
    //        time = libvlc_media_player_get_time(mp);
    //        printf("MediaPlayerTimeChanged %lld ms\n", (long long)time);
    //        break;
    //    case libvlc_MediaPlayerEndReached:
    //        printf("MediaPlayerEndReached\n");
    //        done = 1;
    //        break;
    //    default:
    //        printf("%s\n", libvlc_event_type_name(pEvt->type));
    //    }
    //}

    clock_t startTime[8];
    int framesReceivedThisSecond[8];

    int main()
    {


       // VLC pointers
       libvlc_instance_t *inst;
       libvlc_media_t *m;
       void *pUserData = 0;

       VideoDataStruct dataStruct;

       // VLC options
       char smem_options[1000];

       // RV24
       sprintf(smem_options
               , "#transcode{vcodec=RV24}:smem{"
                 "video-prerender-callback=%lld,"
                 "video-postrender-callback=%lld,"
                 "video-data=%lld,"
                 "no-time-sync},"
               , (long long int)(intptr_t)(void*)&amp;cbVideoPrerender
               , (long long int)(intptr_t)(void*)&amp;cbVideoPostrender
               , (long long int)(intptr_t)(void*)&amp;dataStruct
               );

       const char * const vlc_args[] = {
           "-I", "dummy",            // Don't use any interface
           "--ignore-config",        // Don't use VLC's config
           "--extraintf=logger",     // Log anything
           "--verbose=4",            // Be verbose
           //        "--ffmpeg-hw",
           //        "-vvv",
           "--ffmpeg-hw",
           "--avcodec-hw=any",
           "--sout", smem_options    // Stream to memory

       };

       // Launch VLC
       inst = libvlc_new(sizeof(vlc_args) / sizeof(vlc_args[0]), vlc_args);

       // Create a new item
       m = libvlc_media_new_location(inst, rtspAddress);



       // Create a media player playing environement
       mp = libvlc_media_player_new_from_media(m);

       //    libvlc_event_manager_t* eventManager = libvlc_media_player_event_manager(mp);
       //    libvlc_event_attach(eventManager, libvlc_MediaPlayerTimeChanged, handleEvent, pUserData);
       //    libvlc_event_attach(eventManager, libvlc_MediaPlayerEndReached, handleEvent, pUserData);
       //    libvlc_event_attach(eventManager, libvlc_MediaPlayerPositionChanged, handleEvent, pUserData);

       //libvlc_video_set_format(mp, "RV24", 240, 320, 240 * 3 );

       // play the media_player
       libvlc_media_player_play(mp);


       // Create a window for displaying the video
       std::string winName("Demo Video");
       cv::namedWindow(winName, cv::WINDOW_AUTOSIZE);

       cv::Mat frame;
       int key = 0;

       // Endless loop, press Esc to quit
       while (key != 27)
       {

           // Check for invalid input
           if (videoBuffer)
           {
               // CV_8UC3 = 8 bits, 3 chanels
               frame = cv::Mat(rtspRes, CV_8UC3, videoBuffer);
           }


           if (frame.rows == 0 || frame.cols == 0)
               continue;

           int stream_number=0;
           framesReceivedThisSecond[stream_number]++;
           long    duration = ( std::clock() - startTime[stream_number] );
           if(duration>1000)
           {
               std::cout&lt;&lt;"\n"&lt;&lt;"FPS "&lt;code></ctime></iostream>

    FULL LOG :

    core libvlc debug: Copyright © 1996-2016 the VideoLAN team
    core libvlc debug: revision 2.2.3-37-g888b7e89
    core libvlc debug: configured with ../extras/package/win32/../../../configure  '--enable-update-check' '--enable-lua' '--enable-faad' '--enable-flac' '--enable-theora' '--enable-twolame' '--enable-quicktime' '--enable-avcodec' '--enable-merge-ffmpeg' '--enable-dca' '--enable-mpc' '--enable-libass' '--enable-x264' '--enable-schroedinger' '--enable-realrtsp' '--enable-live555' '--enable-dvdread' '--enable-shout' '--enable-goom' '--enable-caca' '--disable-sdl' '--enable-qt' '--enable-skins2' '--enable-sse' '--enable-mmx' '--enable-libcddb' '--enable-zvbi' '--disable-telx' '--enable-nls' '--host=i686-w64-mingw32' '--build=x86_64-pc-linux-gnu' 'build_alias=x86_64-pc-linux-gnu' 'host_alias=i686-w64-mingw32' 'PKG_CONFIG_PATH=/opt/intel/opencl:' 'PKG_CONFIG_LIBDIR=/home/svlad/DEV/vlc/contrib/i686-w64-mingw32/lib/pkgconfig'
    core libvlc debug: using multimedia timers as clock source
    core libvlc debug:  min period: 1 ms, max period: 1000000 ms
    core libvlc debug: searching plug-in modules
    core libvlc debug: loading plugins cache file C:\DEV\VLCStreamProcessor\build-untitled-Desktop_Qt_5_5_1_MSVC2013_32bit-Debug\debug\plugins\plugins.dat
    core libvlc debug: recursively browsing `C:\DEV\VLCStreamProcessor\build-untitled-Desktop_Qt_5_5_1_MSVC2013_32bit-Debug\debug\plugins'
    core libvlc debug: saving plugins cache C:\DEV\VLCStreamProcessor\build-untitled-Desktop_Qt_5_5_1_MSVC2013_32bit-Debug\debug\plugins\plugins.dat
    core libvlc debug: plug-ins loaded: 418 modules
    core libvlc debug: translation test: code is "C"
    core libvlc debug: CPU has capabilities MMX MMXEXT SSE SSE2 SSE3 SSSE3 SSE4.1 SSE4.2 FPU
    core playlist debug: creating audio output
    core audio output debug: looking for audio output module matching "any": 6 candidates
    directsound audio output debug: found 2 devices
    core audio output debug: using audio output module "directsound"
    core playlist debug: keeping audio output
    core interface debug: looking for interface module matching "logger,none": 16 candidates
    logger interface: VLC media player - 2.2.4 Weatherwax
    logger interface: Copyright © 1996-2016 the VideoLAN team
    logger interface:
    Warning: if you cannot access the GUI anymore, open a command-line window, go to the directory where you installed VLC and run "vlc -I qt"
    logger interface: using logger.
    logger interface warning: no log filename provided, using `vlc-log.txt'
    logger interface debug: opening logfile `vlc-log.txt'
    core libvlc debug: VLC media player - 2.2.4 Weatherwax
    core libvlc debug: Copyright © 1996-2016 the VideoLAN team
    core libvlc debug: revision 2.2.3-37-g888b7e89
    core libvlc debug: configured with ../extras/package/win32/../../../configure  '--enable-update-check' '--enable-lua' '--enable-faad' '--enable-flac' '--enable-theora' '--enable-twolame' '--enable-quicktime' '--enable-avcodec' '--enable-merge-ffmpeg' '--enable-dca' '--enable-mpc' '--enable-libass' '--enable-x264' '--enable-schroedinger' '--enable-realrtsp' '--enable-live555' '--enable-dvdread' '--enable-shout' '--enable-goom' '--enable-caca' '--disable-sdl' '--enable-qt' '--enable-skins2' '--enable-sse' '--enable-mmx' '--enable-libcddb' '--enable-zvbi' '--disable-telx' '--enable-nls' '--host=i686-w64-mingw32' '--build=x86_64-pc-linux-gnu' 'build_alias=x86_64-pc-linux-gnu' 'host_alias=i686-w64-mingw32' 'PKG_CONFIG_PATH=/opt/intel/opencl:' 'PKG_CONFIG_LIBDIR=/home/svlad/DEV/vlc/contrib/i686-w64-mingw32/lib/pkgconfig'
    core interface debug: using interface module "logger"
    core generic debug: creating audio output
    core audio output debug: looking for audio output module matching "any": 6 candidates
    directsound audio output debug: found 2 devices
    core audio output debug: using audio output module "directsound"
    core generic debug: keeping audio output
    core input debug: Creating an input for 'rtsp://192.168.0.245/live_st1'
    core stream output debug: using sout chain=`transcode{vcodec=RV24}:smem{video-prerender-callback=15667245,video-postrender-callback=15667630,video-data=3471900,no-time-sync},'
    core stream output debug: stream=`smem'
    core stream out debug: looking for sout stream module matching "smem": 22 candidates
    core stream out debug: set config option: sout-smem-video-prerender-callback to 15667245
    core stream out debug: set config option: sout-smem-video-postrender-callback to 15667630
    core stream out debug: set config option: sout-smem-video-data to 3471900
    core stream out debug: set config option: sout-smem-time-sync to (null)
    core stream out debug: using sout stream module "stream_out_smem"
    core stream output debug: stream=`transcode'
    core stream out debug: looking for sout stream module matching "transcode": 22 candidates
    core stream out debug: set config option: sout-transcode-vcodec to RV24
    stream_out_transcode stream out debug: Checking video codec mapping for RV24 got RV24
    stream_out_transcode stream out debug: codec video=RV24 0x0 scaling: 0.000000 0kb/s
    core stream out debug: using sout stream module "stream_out_transcode"
    core input debug: using timeshift granularity of 50 MiB, in path 'C:\Users\BCDVideo\AppData\Local\Temp'
    core input debug: `rtsp://admin:admin@192.168.0.245/live_st1' gives access `rtsp' demux `' path `admin:admin@192.168.0.245/live_st1'
    core input debug: specified demux `any'
    core input debug: creating demux: access='rtsp' demux='any' location='admin:admin@192.168.0.245/live_st1' file='\\admin:admin@192.168.0.245\live_st1'
    core demux debug: looking for access_demux module matching "rtsp": 12 candidates
    live555 demux debug: version 2016.01.12
    live555 demux debug: RTP subsession 'video/H264'
    core input debug: selecting program id=0
    live555 demux debug: setup start: 0.000000 stop:0.000000
    live555 demux debug: We have a timeout of 60 seconds
    live555 demux debug: spawned timeout thread
    live555 demux debug: play start: 0.000000 stop:0.000000
    core demux debug: using access_demux module "live555"
    core decoder debug: looking for packetizer module matching "any": 23 candidates
    packetizer_h264 decoder debug: found NAL_SPS (sps_id=0)
    packetizer_h264 decoder debug: found NAL_PPS (pps_id=0 sps_id=0)
    core decoder debug: using packetizer module "packetizer_h264"
    core input debug: starting in sync mode
    core demux meta debug: looking for meta reader module matching "any": 2 candidates
    lua demux meta debug: Trying Lua scripts in C:\Users\BCDVideo\AppData\Roaming\vlc\lua\meta\reader
    lua demux meta debug: Trying Lua scripts in C:\DEV\VLCStreamProcessor\build-untitled-Desktop_Qt_5_5_1_MSVC2013_32bit-Debug\debug\lua\meta\reader
    core demux meta debug: no meta reader modules matched
    core input debug: `rtsp://admin:admin@192.168.0.245/live_st1' successfully opened
    core input debug: switching to async mode
    core input debug: Buffering 0%
    core input debug: Buffering 3%
    core input debug: Buffering 10%
    core stream output debug: adding a new sout input (sout_input:00c21c50)
    core input debug: Buffering 13%
    stream_out_transcode stream out debug: creating video transcoding from fcc=`h264' to fcc=`RV24'
    core input debug: Buffering 16%
    core generic debug: looking for decoder module matching "any": 43 candidates
    core input debug: Buffering 20%
    core input debug: Buffering 23%
    avcodec generic debug: CPU flags: 0x0107d3db
    core input debug: Buffering 30%
    avcodec generic debug: trying to use direct rendering
    core input debug: Buffering 33%
    avcodec generic debug: allowing 4 thread(s) for decoding
    core input debug: Buffering 36%
    avcodec generic warning: threaded frame decoding is not compatible with DXVA2, disabled
    core input debug: Buffering 40%
    avcodec generic debug: avcodec codec (H264 - MPEG-4 AVC (part 10)) started
    core input debug: Buffering 43%
    avcodec generic debug: using slice thread mode with 4 threads
    core input debug: Buffering 50%
    core generic debug: using decoder module "avcodec"
    core input debug: Buffering 53%
    core encoder debug: looking for encoder module matching "any": 20 candidates
    core input debug: Buffering 56%
    core input debug: Buffering 60%
    avcodec encoder debug: CPU flags: 0x0107d3db
    core input debug: Buffering 63%
    avcodec encoder debug: Time base for probing setted to 1/1000000
    core input debug: Buffering 70%
    avcodec encoder debug: Time base set to 1/1000000
    core input debug: Buffering 73%
    avcodec encoder debug: found encoder Raw video
    core input debug: Buffering 76%
    core encoder debug: using encoder module "avcodec"
    core input debug: Buffering 80%
    core encoder debug: removing module "avcodec"
    core input debug: Buffering 83%
    core input debug: Buffering 90%
    core input debug: Buffering 93%
    core input debug: Buffering 96%
    core input debug: Stream buffering done (1002 ms in 834 ms)
    core input debug: Decoder wait done in 0 ms
    avcodec generic debug: available hardware decoder output format 61 (dxva2_vld)
    avcodec generic debug: available hardware decoder output format 128 (d3d11va_vld)
    avcodec generic debug: available software decoder output format 12 (yuvj420p)
    core generic debug: looking for hw decoder module matching "any": 1 candidates
    core generic debug: no hw decoder modules matched
    avcodec generic warning: plane 0 not aligned
    avcodec generic warning: disabling direct rendering
    stream_out_transcode stream out debug: decoder aspect is 1.761468:1
    stream_out_transcode stream out debug: source pixel aspect is 0.990826:1
    stream_out_transcode stream out debug: scaled pixel aspect is 0.990826:1
    stream_out_transcode stream out debug: source 1920x1080, destination 1920x1080
    stream_out_transcode stream out debug: source fps 30/1, destination 30/1
    stream_out_transcode stream out: input interval 33333 (base 1)
    stream_out_transcode stream out: output interval 33333 (base 1)
    stream_out_transcode stream out debug: encoder aspect is 1920:1090
    core filter debug: looking for video filter2 module matching "any": 58 candidates
    swscale filter debug: 1920x1080 (1920x1090) chroma: J420 -> 1920x1080 (1920x1090) chroma: RV24 with scaling using Bicubic (good quality)
    core filter debug: using video filter2 module "swscale"
    core stream out debug: Filter 'Swscale' (0089a2cc) appended to chain
    stream_out_transcode stream out debug: destination (after video filters) 1920x1090
    core encoder debug: looking for encoder module matching "any": 20 candidates
    avcodec encoder debug: CPU flags: 0x0107d3db
    avcodec encoder debug: Time base for probing setted to 1/30
    avcodec encoder debug: Time base set to 1/30
    avcodec encoder debug: found encoder Raw video
    core encoder debug: using encoder module "avcodec"
    stream_out_transcode stream out warning: Reseting video sync
    stream_out_transcode stream out warning: Reseting video sync
    stream_out_transcode stream out warning: Reseting video sync
    stream_out_transcode stream out warning: Reseting video sync
    avcodec encoder warning: almost fed libavcodec with a frame in the past (current: 1518755, last: 1518769)
    avcodec encoder warning: almost fed libavcodec with a frame in the past (current: 1518756, last: 1518769)
    avcodec encoder warning: almost fed libavcodec with a frame in the past (current: 1518757, last: 1518769)
    avcodec encoder warning: almost fed libavcodec with a frame in the past (current: 1518758, last: 1518769)
    avcodec encoder warning: almost fed libavcodec with a frame in the past (current: 1518759, last: 1518769)
    avcodec encoder warning: almost fed libavcodec with a frame in the past (current: 1518760, last: 1518769)
    avcodec encoder warning: almost fed libavcodec with a frame in the past (current: 1518761, last: 1518769)
    avcodec encoder warning: almost fed libavcodec with a frame in the past (current: 1518762, last: 1518769)
    avcodec encoder warning: almost fed libavcodec with a frame in the past (current: 1518763, last: 1518769)
    avcodec encoder warning: almost fed libavcodec with a frame in the past (current: 1518764, last: 1518769)
    stream_out_transcode stream out warning: Reseting video sync
    stream_out_transcode stream out warning: Reseting video sync
    avcodec encoder warning: almost fed libavcodec with a frame in the past (current: 1518784, last: 1518795)
    live555 demux debug: tk->rtpSource->hasBeenSynchronizedUsingRTCP()
    core input error: ES_OUT_RESET_PCR called
    avcodec encoder warning: almost fed libavcodec with a frame in the past (current: 1518785, last: 1518795)
    core input debug: Buffering 0%
    core input debug: Buffering 3%
    core input debug: Buffering 6%
    core input debug: Buffering 10%
    core input debug: Buffering 13%
    core input debug: Buffering 20%
    core input debug: Buffering 23%
    core input debug: Buffering 26%
    core input debug: Buffering 30%
    core input debug: Buffering 33%
    core input debug: Buffering 40%
    core input debug: Buffering 43%
    core input debug: Buffering 46%
    core input debug: Buffering 50%
    core input debug: Buffering 53%
    core input debug: Buffering 60%
    core input debug: Buffering 63%
    core input debug: Buffering 66%
    core input debug: Buffering 70%
    core input debug: Buffering 73%
    core input debug: Buffering 80%
    core input debug: Buffering 83%
    core input debug: Buffering 86%
    core input debug: Buffering 90%
    core input debug: Buffering 93%
    core input debug: Stream buffering done (1002 ms in 817 ms)
    core input debug: Decoder wait done in 0 ms
    stream_out_transcode stream out warning: Reseting video sync
    stream_out_transcode stream out warning: Reseting video sync
    stream_out_transcode stream out warning: Reseting video sync
    stream_out_transcode stream out warning: Reseting video sync
    avcodec encoder warning: almost fed libavcodec with a frame in the past (current: 1518834, last: 1518837)
    avcodec encoder warning: almost fed libavcodec with a frame in the past (current: 1518835, last: 1518837)
    avcodec encoder warning: almost fed libavcodec with a frame in the past (current: 1518836, last: 1518837)
    avcodec encoder warning: almost fed libavcodec with two frames with the same PTS (1518837)
    stream_out_transcode stream out warning: Reseting video sync
    stream_out_transcode stream out warning: Reseting video sync
  • ffmpeg Could not find input stream [closed]

    17 avril 2013, par Peter Walker

    I've seen lot's of post on streaming video feeds to ffserver but still haven't found what I wanted.

    I use not only on the mp4 file but avi and other formats as well.

       ffmpeg -i test5.mp4 http://localhost:8090/feed1.ffm

    I keep finding this error.

       Input #0, mov,mp4,m4a,3gp,3g2,mj2, from &#39;test5.mp4&#39;:
       Metadata:
              major_brand     : isom
              minor_version   : 512
              compatible_brands: isomiso2mp41
              encoder         : Lavf53.21.1
       Duration: 00:05:00.00, start: 0.000000, bitrate: 278 kb/s
       Stream #0.0(und): Video: mpeg4 (Simple Profile), yuv420p, 640x320 [PAR 1:1 DAR     2:1], 277 kb/s, 25 fps, 25 tbr, 25 tbn, 25 tbc
       Incompatible sample format &#39;(null)&#39; for codec &#39;mp2&#39;, auto-selecting format &#39;s16&#39;
       Last message repeated 1 times
       Output #0, ffm, to &#39;http://localhost:8090/feed1.ffm&#39;:
       Stream #0.0: Video: [0][0][0][0] / 0x0000, yuv420p, q=0-0, 1000k tbn
       Stream #0.1: Video: mpeg1video, (null), 32622x226393720, q=2-31, pass 1, pass 2,     226393 kb/s, 1000k tbn
       Stream #0.2: Audio: mp2, 22050 Hz, 1 channels, s16, 226391 kb/s
       Stream #0.3: Video: msmpeg4, yuv420p, 352x240, q=2-31, 226391 kb/s, 1000k tbn, 15  tbc
       Could not find input stream matching output stream #0.2
       *** glibc detected *** ffmpeg: free(): invalid pointer: 0x0000000000a53d00 ***
       ======= Backtrace: =========
       /lib/x86_64-linux-gnu/libc.so.6(+0x7e626)[0x7f6e0d4af626]
       /usr/lib/x86_64-linux-gnu/libavformat.so.53(avformat_free_context+0xb0)    [0x7f6e0f2c9c70]
       ffmpeg[0x4089bf]
       ffmpeg[0x40a52f]
       ffmpeg[0x407a04]
       /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed)[0x7f6e0d45276d]

    The config file I used for the ffserver is

       Port 8090
       RTSPPort 7654
       BindAddress 0.0.0.0
       MaxHTTPConnections 2000
       MaxClients 1000
       MaxBandwidth 500000
       CustomLog -
       NoDaemon
       <feed>
               File /tmp/feed1.ffm
               FileMaxSize 5M
       #       NoAudio
       </feed>

       <stream>
               Feed feed1.ffm
               Format rtp
       #       NoAudio
               VideoFrameRate 30
       </stream>

    Can anyone help me figure out some something or something to look for ?
    I tried googling but almost everyone uses video feeds instead or it just works well for them.
    Any clue or direction/suggestion would help. Thank you so much in advance.

  • Encoding a screenshot into a video using FFMPEG

    2 juillet 2013, par mohM

    I'm trying to get the pixels from the screen, and encode the screenshot into a video using ffmpeg. I've seen a couple of examples but they either assume you already have the pixel data, or use image file input. It seems like whether I use sws_scale() or not (which is included in the examples I've seen), or whether I'm typecasting a HBITMAP or RGBQUAD* it's telling me that the image src data is bad and is encoding a blank image rather than the screenshot. Is there something I'm missing here ?

    AVCodec* codec;
    AVCodecContext* c = NULL;
    AVFrame* inpic;
    uint8_t* outbuf, *picture_buf;
    int i, out_size, size, outbuf_size;
    HBITMAP hBmp;
    //int x,y;

    avcodec_register_all();

    printf("Video encoding\n");

    // Find the mpeg1 video encoder
    codec = avcodec_find_encoder(CODEC_ID_H264);
    if (!codec) {
       fprintf(stderr, "Codec not found\n");
       exit(1);
    }
    else printf("H264 codec found\n");

    c = avcodec_alloc_context3(codec);
    inpic = avcodec_alloc_frame();

    c->bit_rate = 400000;
    c->width = screenWidth;                                     // resolution must be a multiple of two
    c->height = screenHeight;
    c->time_base.num = 1;
    c->time_base.den = 25;
    c->gop_size = 10;                                           // emit one intra frame every ten frames
    c->max_b_frames=1;
    c->pix_fmt = PIX_FMT_YUV420P;
    c->codec_id = CODEC_ID_H264;
    //c->codec_type = AVMEDIA_TYPE_VIDEO;

    //av_opt_set(c->priv_data, "preset", "slow", 0);
    //printf("Setting presets to slow for performance\n");

    // Open the encoder
    if (avcodec_open2(c, codec,NULL) &lt; 0) {
       fprintf(stderr, "Could not open codec\n");
       exit(1);
    }
    else printf("H264 codec opened\n");

    outbuf_size = 100000 + 12*c->width*c->height;           // alloc image and output buffer
    //outbuf_size = 100000;
    outbuf = static_cast(malloc(outbuf_size));
    size = c->width * c->height;
    picture_buf = static_cast(malloc((size*3)/2));
    printf("Setting buffer size to: %d\n",outbuf_size);

    FILE* f = fopen("example.mpg","wb");
    if(!f) printf("x  -  Cannot open video file for writing\n");
    else printf("Opened video file for writing\n");

    /*inpic->data[0] = picture_buf;
    inpic->data[1] = inpic->data[0] + size;
    inpic->data[2] = inpic->data[1] + size / 4;
    inpic->linesize[0] = c->width;
    inpic->linesize[1] = c->width / 2;
    inpic->linesize[2] = c->width / 2;*/


    //int x,y;
    // encode 1 second of video
    for(i=0;itime_base.den;i++) {
       fflush(stdout);


       HWND hDesktopWnd = GetDesktopWindow();
       HDC hDesktopDC = GetDC(hDesktopWnd);
       HDC hCaptureDC = CreateCompatibleDC(hDesktopDC);
       hBmp = CreateCompatibleBitmap(GetDC(0), screenWidth, screenHeight);
       SelectObject(hCaptureDC, hBmp);
       BitBlt(hCaptureDC, 0, 0, screenWidth, screenHeight, hDesktopDC, 0, 0, SRCCOPY|CAPTUREBLT);
       BITMAPINFO bmi = {0};
       bmi.bmiHeader.biSize = sizeof(bmi.bmiHeader);
       bmi.bmiHeader.biWidth = screenWidth;
       bmi.bmiHeader.biHeight = screenHeight;
       bmi.bmiHeader.biPlanes = 1;
       bmi.bmiHeader.biBitCount = 32;
       bmi.bmiHeader.biCompression = BI_RGB;
       RGBQUAD *pPixels = new RGBQUAD[screenWidth*screenHeight];
       GetDIBits(hCaptureDC,hBmp,0,screenHeight,pPixels,&amp;bmi,DIB_RGB_COLORS);

    inpic->pts = (float) i * (1000.0/(float)(c->time_base.den))*90;
       avpicture_fill((AVPicture*)inpic, (uint8_t*)pPixels, PIX_FMT_BGR32, c->width, c->height);                   // Fill picture with image
       av_image_alloc(inpic->data, inpic->linesize, c->width, c->height, c->pix_fmt, 1);
       //printf("Allocated frame\n");
       //SaveBMPFile(L"screenshot.bmp",hBmp,hDc,screenWidth,screenHeight);
       ReleaseDC(hDesktopWnd,hDesktopDC);
       DeleteDC(hCaptureDC);
       DeleteObject(hBmp);

       // encode the image
       out_size = avcodec_encode_video(c, outbuf, outbuf_size, inpic);
       printf("Encoding frame %3d (size=%5d)\n", i, out_size);
       fwrite(outbuf, 1, out_size, f);
    }

    // get the delayed frames
    for(; out_size; i++) {
       fflush(stdout);

       out_size = avcodec_encode_video(c, outbuf, outbuf_size, NULL);
       printf("Writing frame %3d (size=%5d)\n", i, out_size);
       fwrite(outbuf, 1, out_size, f);
    }

    // add sequence end code to have a real mpeg file
    outbuf[0] = 0x00;
    outbuf[1] = 0x00;
    outbuf[2] = 0x01;
    outbuf[3] = 0xb7;
    fwrite(outbuf, 1, 4, f);
    fclose(f);
    free(picture_buf);
    free(outbuf);

    avcodec_close(c);
    av_free(c);
    av_free(inpic);
    printf("Closed codec and Freed\n");