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• run ffmpeg from PHP web script

  18 février 2014, par it6

  I need to manage the recording/capture of a website mindwhile it is running a slide-show to get videos form these slides.

  My approach is :

  <?php 
  
  
  
  define('FFMPEG_LIBRARY', '/usr/bin/ffmpeg ');
  
  
  
  $ffmpegcmd = "ffmpeg -f x11grab -r 25 -s 800x600 -i :0.0 /tmp/output.mpg";
  
  
  
  shell_exec($ffmpegcmd);  
  
  
  
  ?>

  But i get this error from php error log :

  [x11grab @ 0x81e8aa0] device: :0.0 -> display: :0.0 x: 0 y: 0 width: 800 height: 600
  
  No protocol specified
  
  No protocol specified
  
  [x11grab @ 0x81e8aa0] Could not open X display.
  
  :0.0: Input/output error

  Similar command from console run good.

  Please, any help to get display and be able to control ffmpeg from browser php script ?

  Thanks in advance.

  ---

  thanks for your time.

  I got rid the X display error, but not I still haven't got the capture.

  Using xvfb I get an unknown file at /tmp written by www-data user :
   rw-r—r— 1 www-data www-data 11252 Sep 12 09:49 server-B20D7FC79C7F597315E3E501AEF10E0D866E8E92.xkm

  Running startx I got also an unknown file at /tmp
   rw------- 1 www-data www-data 59 Sep 12 09:53 serverauth.oLcFlG7tXC

  any of both grow in size so it is not capturing anything. The content is some binary thing.
  What are those files about ?

  What I am trying is to write a script in which I can control the time ffmpeg is capturing the desktop to create a video from a jquery slide displayed on a website.

  My try from console is closer, but if I can do it by browser I will be able to know when to stop sending an AJAX request once the slide is finished.

  This is my try from console :

  #!/bin/bash
  
  
  
  # start the slide website: I will need to change it to control by querystring the language and course level
  
  firefox http://www.languagecourse.net/vocabulary-trainer.php &
  
  # start recording: I will need to adjust the frame to capture
  
  ffmpeg -f x11grab -r 25 -s 800x600 -i :0.0 /tmp/output2.mpg &
  
  # since I can't control the time a course takes I pause an arbitrary time
  
  sleep 5
  
  # look for the capture PID and close it
  
  for i in $(ps aux | grep ffmpeg | sed "s/  */#/g" | cut -f2 -d#)
  
  do
  
    echo "proceso $i killed"
  
    kill -9 $i
  
  done

  I wonder once the website is opened I can continue doing the control from AJAX, but not know if I will be able to get the ffmpeg PID to stop the command.

  I will appreciate any kind of comments.

  Regards,
  ·_-

• ffmpeg, video Conversion

  7 novembre 2012, par user1805414

  I have 2 video.
  Metadata files :

  Seems stream 0 codec frame rate differs from container frame rate: 2000.00 (2000/1) -> 30.00 (30/1)
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '89.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 0
  
      compatible_brands: mp41isom
  
      creation_time   : 2012-10-23 08:10:51
  
    Duration: 00:00:08.96, start: 0.000000, bitrate: 2017 kb/s
  
      Stream #0.0(eng): Video: h264 (Baseline), yuv420p, 640x480, 2006 kb/s, 28.53 fps, 30 tbr, 1k tbn, 2k tbc
  
      Metadata:
  
        creation_time   : 2012-10-23 08:10:51
  
      Stream #0.1(eng): Audio: aac, 48000 Hz, stereo, s16, 48 kb/s
  
      Metadata:
  
        creation_time   : 2012-10-23 08:10:51
  
  At least one output file must be specified.
  
  //--------------------------------------------------------------------------------------------------------------//
  
  Seems stream 1 codec frame rate differs from container frame rate: 180000.00 (180000/1) -> 90000.00 (180000/2)
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '56_1.mp4':
  
    Metadata:
  
      major_brand     : 3gp4
  
      minor_version   : 0
  
      compatible_brands: isom3gp4
  
      creation_time   : 1946-11-02 07:14:31
  
    Duration: 00:00:05.23, start: 0.000000, bitrate: 239 kb/s
  
      Stream #0.0(eng): Audio: amrnb, 8000 Hz, 1 channels, flt, 5 kb/s
  
      Metadata:
  
        creation_time   : 1946-11-02 07:14:31
  
      Stream #0.1(eng): Video: h264 (Baseline), yuv420p, 480x320, 240 kb/s, PAR 65536:65536 DAR 3:2, 17.63 fps, 90k tbr, 90k tbn, 180k tbc
  
      Metadata:
  
        creation_time   : 1946-11-02 07:14:31
  
  At least one output file must be specified.

  They do not play on my website.
  How to bring them to a form ?

  Seems stream 0 codec frame rate differs from container frame rate: 47.95 (5994/125) -> 23.98 (24000/1001)
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'oceans-clip.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 1
  
      compatible_brands: isomavc1
  
      creation_time   : 2010-05-18 04:24:00
  
    Duration: 00:00:46.54, start: 0.000000, bitrate: 3342 kb/s
  
      Stream #0.0(und): Video: h264 (Constrained Baseline), yuv420p, 640x264 [PAR 132:133 DAR 320:133], 3195 kb/s, PAR 127:128 DAR 635:264, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc
  
      Metadata:
  
        creation_time   : 2010-05-18 04:24:00
  
      Stream #0.1(und): Audio: aac, 44100 Hz, stereo, s16, 144 kb/s
  
      Metadata:
  
        creation_time   : 2010-05-18 04:24:01
  
  At least one output file must be specified

  I get the video to android and vinfone devices, and must play it on your site, but the player does not want to play. Metadata files that I get see the beginnings. The latter belongs to the metadata file that correctly reproduced on the site.

• Merge mp3 files having different bitrate using ffmpeg [closed]

  9 janvier 2013, par XCoder

  ffmpeg -i "concat:file1.mp3|file2.mp3" -acodec copy output.mp3

  This command works fine if file1.mp3 & file2.mp3 have same bit-rates.

  I've been searching for past 4 hours but found nothing on how to merge mp3 files having different bit-rates.

  I have two different mp3's having bitrates of 128Kbps & 192Kbps. How to merge them to form a single mp3 file.