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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

• Unable to transfer continuous FFmpeg buffer to client browser using node.js

  10 décembre 2016, par chintitomasud

  I have tried to process a Video file transcoding on demand by using FFmpeg to transfer the chunk(buffer) to the client browser as mp4 format but I failed to show the mp4 content on html5 video player . Without using ffmpeg all code run properly . I have replaced createReadSteam with ffmpeg . Using it I have faced some problems. FFmpeg is new to me and I ’m kind of confused with spawn method. When I post a url path it shows the following text on the command line

  Spawning new process /samiul113039/1080.mp4:GET

  piping ffmpeg output to client, pid 10016

  HTTP connection disrupted, killing ffmpeg : 10016

  Spawning new process /samiul113039/1080.mp4:GET

  piping ffmpeg output to client, pid 4796

  HTTP connection disrupted, killing ffmpeg : 4796

  ffmpeg didn’t quit on q, sending signals ffmpeg has exited : 10016,

  code null ffmpeg didn’t quit on q, sending signals ffmpeg has exited :
  4796, code nul

  =

  var fs=require('fs');
  
  
  
  var url=require("url");
  
  var urlvalue="http://csestudents.uiu.ac.bd/samiul113039/1080.mp4";
  
  
  
  
  
  var parseurl=url.parse(urlvalue);
  
  
  
  var HDHomeRunIP = parseurl.hostname;
  
  var HDHomeRunPort = parseurl.port;
  
  var childKillTimeoutMs = 1000;
  
  
  
  var parseArgs = require('minimist')(process.argv.slice(2));
  
  
  
  // define startsWith for string
  
  if (typeof String.prototype.startsWith != 'function') {
  
    // see below for better implementation!
  
    String.prototype.startsWith = function (str){
  
      return this.indexOf(str) == 0;
  
    };
  
  }
  
  // Called when the response object fires the 'close' handler, kills ffmpeg 
  
  function responseCloseHandler(command) {
  
    if (command.exited != true) {
  
      console.log('HTTP connection disrupted, killing ffmpeg: ' + command.pid);
  
      // Send a 'q' which signals ffmpeg to quit. 
  
      // Then wait half a second, send a nice signal, wait another half second
  
      // and send SIGKILL
  
      command.stdin.write('q\n');
  
      command.stdin.destroy();
  
      // install timeout and wait
  
      setTimeout(function() {
  
        if (command.exited != true) {
  
          console.log('ffmpeg didn\'t quit on q, sending signals');
  
          // still connected, do safe sig kills
  
          command.kill();
  
          try { 
  
            command.kill('SIGQUIT');
  
          } catch (err) {}
  
          try {
  
            command.kill('SIGINT');
  
          } catch (err) {} 
  
          // wait some more!
  
          setTimeout(function() {
  
            if (command.exited != true) {
  
              console.log('ffmpeg didn\'t quit on signals, sending SIGKILL');
  
              // at this point, just give up and whack it
  
              try {
  
                command.kill('SIGKILL');
  
              } catch (err) {}
  
            }
  
          }, childKillTimeoutMs);
  
        }    
  
      }, childKillTimeoutMs);
  
    }
  
  }
  
  
  
  // Performs a proxy. Copies data from proxy_request into response
  
  function doProxy(request,response,http,options) {
  
    var proxy_request = http.request(options, function (proxy_response) {
  
      proxy_response.on('data', function(chunk) {
  
        response.write(chunk, 'binary');
  
      });
  
      proxy_response.on('end', function() {
  
        response.end();
  
      });
  
      response.writeHead(proxy_response.statusCode, proxy_response.headers);
  
    });
  
    request.on('data', function(chunk) {
  
      proxy_request.write(chunk, 'binary');
  
    });
  
    // error handler
  
    proxy_request.on('error', function(e) {
  
      console.log('problem with request: ' + e.message);
  
      response.writeHeader(500);
  
      response.end();
  
    });
  
  
  
    proxy_request.end();
  
  }
  
  
  
  var child_process = require('child_process');
  
  var auth = require('./auth');
  
  // Performs the transcoding after the URL is validated
  
  function doTranscode(request,response) {
  
    //res.setHeader("Accept-Ranges", "bytes");
  
    response.setHeader("Accept-Ranges", "bytes");
  
    response.setHeader("Content-Type", "video/mp4");        
  
    response.setHeader("Connection","close");
  
    response.setHeader("Cache-Control","no-cache");
  
    response.setHeader("Pragma","no-cache");
  
  
  
    // always write the header
  
    response.writeHeader(200);
  
  
  
    // if get, spawn command stream it
  
    if (request.method == 'GET') {
  
      console.log('Spawning new process ' + request.url + ":" + request.method);
  
  
  
  var command = child_process.spawn('ffmpeg', 
  
                                        ['-i','http://csestudents.uiu.ac.bd/samiul113039/1080.mp4','-f','mpegts','-'],
  
                                        { stdio: ['pipe','pipe','ignore'] }); 
  
  
  
       command.exited = false;
  
      // handler for when ffmpeg dies unexpectedly
  
      command.on('exit',function(code,signal) {
  
        console.log('ffmpeg has exited: ' + command.pid + ", code " + code);
  
        // set flag saying we've quit
  
        command.exited = true;
  
        response.end();
  
      });
  
      command.on('error',function(error) {
  
        console.log('ffmpeg error handler - unable to kill: ' + command.pid);
  
        // on well, might as well give up
  
        command.exited = true;
  
        try {
  
          command.stdin.close(); 
  
        } catch (err) {}
  
        try {
  
          command.stdout.close();
  
        } catch (err) {}
  
        try {
  
          command.stderr.close();
  
        } catch (err) {}
  
        response.end();
  
      });
  
      // handler for when client closes the URL connection - stop ffmpeg
  
      response.on('end',function() { 
  
       responseCloseHandler(command);
  
      });
  
      // handler for when client closes the URL connection - stop ffmpeg
  
      response.on('close',function() { 
  
        responseCloseHandler(command); 
  
      });
  
  
  
      // now stream
  
      console.log('piping ffmpeg output to client, pid ' + command.pid);
  
      command.stdout.pipe(response);
  
      command.stdin.on('error',function(err) {
  
        console.log("Weird error in stdin pipe ", err);
  
        response.end();
  
      });
  
      command.stdout.on('error',function(err) {
  
        console.log("Weird error in stdout pipe ",err);
  
        response.end();
  
      });
  
    } 
  
    else {
  
      // not GET, so close response
  
      response.end();
  
    }
  
  }
  
  
  
  // Load the http module to create an http server.
  
  var http = require('http');
  
  
  
  // Configure our HTTP server to respond with Hello World to all requests.
  
  var server = http.createServer(function (request, response) {
  
    //console.log("New connection from " + request.socket.remoteAddress + ":" + request.url);
  
  
  
    if (auth.validate(request,response)) {
  
      // first send a HEAD request to our HD Home Run with the same url to see if the address is valid.
  
      // This prevents an ffmpeg instance to spawn when clients request invalid things - like robots.txt/etc
  
      var options = {method: 'HEAD', hostname: HDHomeRunIP, port: HDHomeRunPort, path: request.url};
  
      var req = http.request(options, function(res) {
  
        // if they do a get, and it returns good status
  
        if (request.method == "GET" &&
  
            res.statusCode == 200 &&
  
            res.headers["content-type"] != null &&
  
            res.headers["content-type"].startsWith("video")) {
  
          // transcode is possible, start it now!
  
          doTranscode(request,response);
  
        } 
  
        else {
  
          // no video or error, cannot transcode, just forward the response from the HD Home run to the client
  
          if (request.method == "HEAD") {
  
            response.writeHead(res.statusCode,res.headers);
  
            response.end();
  
          }
  
          else {
  
            // do a 301 redirect and have the device response directly  
  
  
  
            // just proxy it, that way browser doesn't redirect to HDHomeRun IP but keeps the node.js server IP
  
            options = {method: request.method, hostname: HDHomeRunIP, /* port: HDHomeRunPort, */path: request.url};
  
            doProxy(request,response,http,options);
  
          }
  
        }
  
      });
  
      req.on('error', function(e) {
  
        console.log('problem with request: ' + e.message);
  
        response.writeHeader(500);
  
        response.end();
  
      });
  
      // finish the client request, rest of processing done in the async callbacks
  
      req.end();
  
    }
  
  });
  
  
  
  // turn on no delay for tcp
  
  server.on('connection', function (socket) {
  
    socket.setNoDelay(true);
  
  });
  
  server.listen(7000);

  stdio : [’pipe’,’pipe’,’ignore’]
  Actually the code was written by someone. i have just modified the code.
  [’pipe’,’pipe’,’ignore’] what does pipe,pipe.ignore mean here,

• How i can resize rectangular video into square size without loosing quality ?

  15 février 2017, par Srinivas 25

  Our challenge is how do we can resize 1080*720 format videos to 720*720 format without loosing quality. Hence we are using ffmpeg for video encoding, please advice any tool or tips to achieve this ?