Sur d’autres sites (10963)

• Using GStreamer to receive and send h264 video (from OBS)

  16 mars 2020, par Ivorius

  I’ve been trying to set up using GStreamer to get support for some input I can output from OBS.

  OBS : rtp_mpegts to udp ://localhost:5000

  http-launch 8080 webmmux streamable=true name=stream udpsrc uri=udp://localhost:5000 caps="application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)MP2T-ES, payload=(int)
  
  33" ! gstrtpjitterbuffer latency=200 ! application/x-rtp ! rtpmp2tdepay ! video/mpegts ! mpegtsdemux ! video/x-h264 ! queue ! decodebin ! vp8enc ! stream.   audiotestsrc ! vorbisenc ! stream.

  However, using this it seems to accept connections, but just closes them again after a while. Any clues on what I am doing wrong ? I am open to any format changes as long as they’re supported by OBS / ffmpeg.

  As a bonus, how do I add support for audio as well ?

  Background

  I’ve found https://github.com/sdroege/http-launch, which works well in displaying a GStreamer video over http:

  <video autoplay="autoplay" controls="">
  
      <source src="https://localhost:8080" type="video/mp4" codecs="avc1.4D401E, mp4a.40.2">
  
      You browser doesn't support element <code>video
  .
  
  
  
  
  

  I’ve managed to set up a pipeline where I can use a GStreamer source to pipe into a http-launch
  pipeline and display it on video :

  http-launch 8080 webmmux streamable=true name=stream udpsrc port=5000 caps = "application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264, payload=(int)96" ! mpegtsdemu
  
  x ! h264parse ! TIViddec2 ! videoconvert ! vp8enc ! stream.   audiotestsrc ! vorbisenc ! stream.
  
  
  
  gst-launch-1.0 -v videotestsrc ! videoconvert ! x264enc tune=zerolatency bitrate=500 speed-preset=superfast ! rtph264pay ! udpsink host=127.0.0.1 port=5000

  However, I don’t think OBS supports rpt over UDP. It uses ffmpeg to send these packets, which can stream rtp_mpegts. I’ve found some code snippets which claim to support the format, and stitch together the above pipeline.

• PHP - Read and write the same file hangs

  2 février 2016, par Adracat

  I’m trying to use FFMPEG to make some works with video on the server, and something I need to do is to get the progress of the process.

  I searched a little and I found this solution which tells to write the log into a file and then reading and parsing it.

  The problem

  What is driving me crazy is that I tell FFMPEG - with exec - (process A) to write the log into a file, but when I try to read it - with file_get_contents() - (process B) it does not show the contents until process A is finished (or interrupted the PHP script).

  So, when process A finishes or it says "PHP script timeout", then I can read the file as times as I want, refreshing the page (process B) and showing the contents at the time.

  What I’ve tried

  I’ve tried to use fopen() to create the file with w, w+ and a parameters, using - and without using - fclose(). I’ve tried to use also flock() just in case it gets faster to read to process B if it knows it’s already locked and does not have to wait, but then FFMPEG is not able to write into the file.

  I’ve searched for multithreading too, but I think there must be an easier and simpler way.

  I’ve used also CURL and HTTP context, as this link suggests, but no luck.

  I’ve tried, too, to use PHP-FFMPEG but it’s not supporting the last FFMPEG version, so I cannot use it.

  When I said before "(or interrupted the PHP script)" is because I tried to wait and, when PHP got a timeout, process B worked alright and the file was still updating.

  The code

  Process A (fileA.php)

  exec('ffmpeg -y -i input_file.mp4 output_file.avi 2> C:\Full\Path\To\File\log.txt 1>&2');

  Process B (fileB.php)

  $content = file_get_contents($file);
  
  
  
  if($content){
  
      //get duration of source
  
      preg_match("/Duration: (.*?), start:/", $content, $matches);
  
  
  
      $rawDuration = $matches[1];
  
  
  
      //rawDuration is in 00:00:00.00 format. This converts it to seconds.
  
      $ar = array_reverse(explode(":", $rawDuration));
  
      $duration = floatval($ar[0]);
  
      if (!empty($ar[1])) $duration += intval($ar[1]) * 60;
  
      if (!empty($ar[2])) $duration += intval($ar[2]) * 60 * 60;
  
  
  
      //get the time in the file that is already encoded
  
      preg_match_all("/time=(.*?) bitrate/", $content, $matches);
  
  
  
      $rawTime = array_pop($matches);
  
  
  
      //this is needed if there is more than one match
  
      if (is_array($rawTime)){$rawTime = array_pop($rawTime);}
  
  
  
      //rawTime is in 00:00:00.00 format. This converts it to seconds.
  
      $ar = array_reverse(explode(":", $rawTime));
  
      $time = floatval($ar[0]);
  
      if (!empty($ar[1])) $time += intval($ar[1]) * 60;
  
      if (!empty($ar[2])) $time += intval($ar[2]) * 60 * 60;
  
  
  
      //calculate the progress
  
      $progress = round(($time/$duration) * 100);
  
  
  
      echo "Duration: " . $duration . "<br />";
  
      echo "Current Time: " . $time . "<br />";
  
      echo "Progress: " . $progress . "%";
  
  
  
  }

  The process

  I just open fileA.php on a Chrome tab and, after a few seconds, I open fileB.php on another Chrome tab (and it stays as loading).

  What I need

  I need to be able to load the file and show the information I want to show while the file is being written (by exec and FFMPEG or other PHP scripts), so I can update the progress percentage with some AJAX calls.

  Extra information

  At this point, I’m using PHP 5.4 on a IIS 7.5 with Windows 7 Professional.

  Thank you everyone for your time, help and patience !

  Best regards.

• FFmpeg - Concatenate all videos with similar file name ?

  24 décembre 2017, par Pan Hart

  Is there any way to use ffmpeg to concatenate all video files that have the exact same file name for the specified first few characters ?

  For example, if I set it to match the first 5 characters, it will match and concatenate video_1.flv, video_2.flv, video_3.flv and so on.

  But, at the same time, it can also match and concatenate tests_1.flv, tests_2.flv, tests_3.flv and so on.

  Any help will be appreciated !