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• Convert RTSP stream to MP4

  11 février 2017, par edua_glz

  I have a IP Camera that supports RTSP, and I need to display this stream to multiple clients using HTML5.

  Since HTML Video tag doesn't support RTSP, I'm calling ffmpeg to encode it to a WEBM stream, but the result is very glitchy and distorts the original stream.

  The command im using is the following: ffmpeg -i my_RSTP_URL -vcodec libvpx -f webm -

  To distribute the stream I'm using a Node.js instance that calls the rtsp stream via ffpmeg when needed.

  The solution looks like such:

  Camera --Via RSTP--> ffmpeg --Encodes to WEBM--> Node.js --Via HTML5 Video--> Client

  Node.js code:

      var request = require('request');
      var http = require('http');
      var child_process = require("child_process");
      var stdouts = {};
  
      http.createServer(function (req, resp) {
      switch (params[0])
      {
        case "LIVE":
          resp.writeHead(200, {'Content-Type': 'video/mp4', 'Connection': 'keep-alive'});
  
  
              // Start ffmpeg
                  var ffmpeg = child_process.spawn("ffmpeg",[
                      "-i","my_RSTP_URL", // Capture offset
                      "-vcodec","libvpx",      // vp8 encoding
                      "-f","webm",             // File format
                      "-"                      // Output to STDOUT
                  ]);
  
              ffmpeg.on('exit', function()
                  {
                      console.log('ffmpeg terminado');
                  });
  
              ffmpeg.on('error',function(e)
              {
                  console.log(e);
              })
  
              ffmpeg.stdout.on('data',function(data)
              {
                  console.log('datos'+data);
              });
  
  
              ffmpeg.stderr.on('data', function(data) {
                  console.log('stderr'+data);
              });
  
              stdouts[params[1]] = ffmpeg.stdout;
  
              // Pipe the video output to the client response
              ffmpeg.stdout.pipe(resp);
  
          console.log("Initializing camera");
          break;
      }
  
  
      }).listen(8088);
  
      console.log('Server running at port 8088');
  

  Am I using the wrong library codec? Or why Am I getting such a weird result?

• Which Dedicated Server for FFMPEG ?

  11 février 2017, par OarSmaN

  My website converts video to audio and video to video using FFMPEG (full Centos 64bit install). Mostly i got multiple conversions (10-20) real time. I use cache for already converted audios/videos. I am currently moving to a dedicated server and i need to know which configuration would be best for my situation.

  Which of the below servers is better for FFMPEG;

  SINGLE Intel® Xeon® Processor E3-1270 v5, 8M Smart Cache, 3.60 GHz, 8 GT/s DMI3 (4 Cores-8 Threads) / 32GB DDR4 2133 / 240GB S3500 Intel Wolfsville SSD + 1TB Enterprise Grade HDD (for caching)

  DUAL Intel® Xeon® Processor E5-2620, 15M Smart Cache, 2.00 GHz, 7.20 GT/s Intel® QPI (12 Cores-24 Threads) / 32GB DDR3 1333 / 120GB S3500 Intel Wolfsville SSD + 1TB Enterprise Grade HDD (for caching)

  thanks for your ideas.

• Crashing adobe premier cc pro when importing h264 mp4 file

  11 février 2017, par rpo

  I am screencasting with kazam in Ubuntu which is h264.

  To edit the video i tried to use vegas pro latest version. It only play the audio without any video.

  Then i tried to edit it with adobe premier 2017. Whenever i import the file(mp4) the premier pro just crash without any useful message.

  I installed quicktime for the codecs but no luck. I also converted the media with Format Factory(http://www.pcfreetime.com/) to MOV ... but premier just crash.

  How can i solve this ?

  here is the MediaInfo:

          General
      Complete name                            : C:\Users\user\Desktop\vdo.mp4
      Format                                   : MPEG-4
      Format profile                           : Base Media / Version 2
      Codec ID                                 : mp42 (mp42/mp41/isom/iso2)
      File size                                : 23.0 MiB
      Duration                                 : 9 min 20 s
      Overall bit rate                         : 344 kb/s
      Encoded date                             : UTC 2017-02-11 06:43:57
      Tagged date                              : UTC 2017-02-11 06:43:57
  
      Video
      ID                                       : 1
      Format                                   : AVC
      Format/Info                              : Advanced Video Codec
      Format profile                           : High 4:4:4 Predictive@L4
      Format settings, CABAC                   : No
      Format settings, ReFrames                : 1 frame
      Codec ID                                 : avc1
      Codec ID/Info                            : Advanced Video Coding
      Duration                                 : 9 min 20 s
      Bit rate                                 : 343 kb/s
      Maximum bit rate                         : 2 097 kb/s
      Width                                    : 1 674 pixels
      Height                                   : 858 pixels
      Display aspect ratio                     : 1.951
      Frame rate mode                          : Constant
      Frame rate                               : 15.000 FPS
      Color space                              : YUV
      Chroma subsampling                       : 4:4:4
      Bit depth                                : 8 bits
      Scan type                                : Progressive
      Bits/(Pixel*Frame)                       : 0.016
      Stream size                              : 22.9 MiB (100%)
      Writing library                          : x264 core 148 r2643 5c65704
      Encoding settings                        : cabac=0 / ref=1 / deblock=0:0:0 / analyse=0:0 / me=dia / subme=0 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=0 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=6 / threads=4 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=0 / weightp=0 / keyint=150 / keyint_min=15 / scenecut=0 / intra_refresh=0 / rc=cqp / mbtree=0 / qp=15 / ip_ratio=1.40 / aq=0
      Language                                 : English
      Encoded date                             : UTC 2017-02-11 06:43:57
      Tagged date                              : UTC 2017-02-11 06:43:57
  

  Here is the screencast preference:

• soft subtitles showing by default when video is played

  11 février 2017, par dexter

  Is it possible to create a video file that contains a soft subtitle and shows it by default (as soon as you open it in VLC - without the need to activate the subtitle track) from an original video file and the appropriate subtitle file?

  I have tried the following:

  ffmpeg -i input.mp4 -i input.ass -c:v copy -c:a copy -c:s copy -map 0:0 -map 0:1 -map 1:0 -y out.mkv
  

  The resulting out.mkv does contain the subtitle but it does not show by default. Thanks for your help.

• Burn in delayed subtitles

  11 février 2017, par sygi

  I would like to burn subtitles into a video file using a console program. Previously I used ffmpeg to do that:

  ffmpeg -i input.mkv -vf subtitles=sub.srt -strict -2 out.mp4
  

  However, I am having problems when my subtitles are delayed with regard to the movie. I looked into -ioffset option and setpts filter, but they allow me move the video, but I'd like the video timing to stay unchanged and only burn in the subtitles in a delayed manner.

  Is there a way to do it in ffmpeg (I suppose no, as burning subtitles is a filter and I don't see a way to "change" a behavior of filters, but I haven't looked at all of them)? If not, is there an easy-to-use console program which would delay the subtitles before burning them in?