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• PHP-FFMpeg video output is truncated

  25 juin 2019, par showdev

  I’m using the PHP-FFMpeg library found here and code from the "Basic Usage" section.

  The outputted video seems to be truncated. I’m using a source video that’s 28 seconds long, but the output is only 9 seconds. What’s going wrong ?

  Here, I’m checking the duration of the source video :

  $ffprobe = FFMpeg\FFProbe::create();
  
  $duration = $ffprobe
  
    ->format('test/source.mp4')
  
    ->get('duration');

  28.700000

  Then generating an output video :

  $ffmpeg = FFMpeg\FFMpeg::create();
  
  $video = $ffmpeg->open('test/source.mp4');
  
  $video->save(new FFMpeg\Format\Video\X264(), 'test/export.mp4');

  Then checking the duration of the output video :

  $ffprobe = FFMpeg\FFProbe::create();
  
  $duration = $ffprobe
  
    ->format('test/export.mp4')
  
    ->get('duration');

  9.234000

• asp.net core live mp4 streaming

  8 octobre 2020, par kdma

  Prologue :

  


  I have a hikvision ipcamera that streams raw h264 from a rtsp :// url, I need to play this live feed in the browser.

  


  I managed to get a basic RTSP->ffmpeg-> (faststart) mp4 pipeline working and I can play the video when saved to a file.

  


  I don't understand how to make my controller action "streamable".

  


  I've tried various approaches like writing to Response.Body, Transfer-Encoding : chunked but nothing seems to work.
Here is the basic code :

  


  public IActionResult Play5(){    
      var ms = new MemoryStream();
      var muxer = new RTSPToMp4(ms);
      Task.Run(() => muxer.Stream());
      return new FileStreamResult(ms, "video/mp4");
}


  


  The memory stream contains the live feed but the response is empty here is the request\response from chrome :

  


  Request

  


  method: GET
:path: /api/stream/play5
:scheme: https
accept: */*
accept-encoding: identity;q=1, *;q=0
accept-language: it-IT,it;q=0.9,en-US;q=0.8,en;q=0.7
cache-control: no-cache
pragma: no-cache
range: bytes=0-
referer: https://localhost:5001/Stream
sec-fetch-dest: video
sec-fetch-mode: no-cors
sec-fetch-site: same-origin
user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.121 Safari/537.36


  


  Response

  


  content-length: 0
content-type: video/mp4
date: Thu, 08 Oct 2020 14:31:06 GMT
server: Kestrel
status: 200


  


  Am I missing something ?

  


• Chop video in parts

  15 mai 2019, par Reckless Velociraptor

  I tried to use this command :

  ffmpeg -i "in.mp4" -codec copy -map 0 -f segment -segment_list out.txt -segment_times 01:00:00,01:00:00,01:00:00 out%03d.mp4

  and expected 1hour long parts. But this is not what I get. What is correct syntax for -segment_times ?