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• ffmpeg-php to create thumbnail of video

  8 novembre 2014, par Wazzzy

  I am trying to use this script to create thumbnail of a video using ffmpeg. At first I used phpinfo(); and I found ffmpeg is installed on my server.

  Then I copied ffmpeg-php onto my server and run the test file

  I got to know that many function are working on my server

  I got output like this

  Output :-

  Functions available in /usr/lib/php/extensions/no-debug-non-zts-20060613/ffmpeg.so extension:
  
  
  
  Methods available in class ffmpeg_movie:
  
  __construct
  
  getduration
  
  getframecount
  
  getframerate
  
  getfilename
  
  getcomment
  
  gettitle
  
  getauthor
  
  getartist
  
  getcopyright
  
  getalbum
  
  getgenre
  
  getyear
  
  gettracknumber
  
  getframewidth
  
  getframeheight
  
  getframenumber
  
  getpixelformat
  
  getbitrate
  
  hasaudio
  
  hasvideo
  
  getnextkeyframe
  
  getframe
  
  getvideocodec
  
  getaudiocodec
  
  getvideostreamid
  
  getaudiostreamid
  
  getaudiochannels
  
  getaudiosamplerate
  
  getaudiobitrate
  
  getvideobitrate
  
  getpixelaspectratio
  
  getpixelaspectratio
  
  getvideobitrate
  
  getaudiobitrate
  
  getaudiosamplerate
  
  getaudiochannels
  
  getaudiostreamid
  
  getvideostreamid
  
  getaudiocodec
  
  getvideocodec
  
  getframe
  
  getnextkeyframe
  
  hasvideo
  
  hasaudio
  
  getbitrate
  
  getpixelformat
  
  getframenumber
  
  getframeheight
  
  getframewidth
  
  gettracknumber
  
  getyear
  
  getgenre
  
  getalbum
  
  getcopyright
  
  getartist
  
  getauthor
  
  gettitle
  
  getcomment
  
  getfilename
  
  getframerate
  
  getframecount
  
  getduration
  
  __construct

  I wrote this code and tried any possible path to assign $ffmpeg;

  <?php
  
  
  
      $thumb_stdout;
  
      $retval=0;
  
      $ffmpeg = '/home/lib/ffmpeg';
  
  
  
  // change "demo.mpg" to your mpg file name!
  
  $video  = dirname(__FILE__) . 'demo.mpg';
  
  
  
  // change "demo.jpg" to whichever name you like or don't
  
  // for this example, the name of the output jpg file does not matter
  
  $image  = dirname(__FILE__) . 'demo.jpg';
  
  
  
  $second = 1;
  
  
  
  $cmd = "$ffmpeg -i $video 2>&1";
  
  if (preg_match('/Duration: ((\d+):(\d+):(\d+))/s', '$cmd', $time)) {
  
      $total = ($time[2] * 3600) + ($time[3] * 60) + $time[4];
  
      $second = rand(1, ($total - 1));
  
  }
  
  
  
  //$cmd = "$ffmpeg -i $video -deinterlace -an -ss $second -t 00:00:01 -r 1 -y -vcodec mjpeg -f mjpeg $image 2>&1";
  
  $cmd = "$ffmpeg -i $video -r 1 -ss 00:00:05 -t 00:00:01 -s 250x250 -f image2 $image";
  
  echo $cmd;
  
  exec($cmd);
  
  //$return = '$cmd';
  
  
  
  echo '<br />done!';
  
  ?>

• Writing Live-Multimedia-Application using OpenGL & Co. saving output to disc [closed]

  21 janvier 2013, par user1997286

  I want to write an application that does the following thing :

  • Getting Commands via ArtNET (DMX over Ethernet, a Control Protocol) for each object (called Layer)
  • each Layer could be one of the following : Live Camera Stream, Movie, Image
  • each layer could be translated, rotated or stretched
  • on each layer I can set filters (Like a Kaleidoscope Effect, Blur, Color Correction, etc.)
  • the rsulting video-stream is in the 3d-space
  • I want to display each part of the image on one Projector (in total up to 3 ones) using a TripleHead2GO (3 Projectors display a different region of my DVI-Output). Each Projecector-Image should have own Soft-Edge and Keystone parameters.
  • the resulting image will also be shown on a Preview-Screen with some Information overlay.

  I think all that should be possible with opengl and openal (for the movie audio)

  I think I'll use C++, OpenGL for Graphics, OpenAL for Audio, if needed ffmpeg for Video conversion, Ubuntu/Debian as OS.

  The software is used to do Multimedia-Shows on Concerts including Cameras & Co.

  All that should happen Live (On a FullHD output), Having i7 3770, GLX 670 and 16GB of Ram for at least 8 Layers. (4 Live-Images at once + Some Overlays like the Actors Name and some Logos)

  But now comes the question.

  Is it also Posible to do the following with that setting :

  • Writing the output Image with all the 3d translations to a Movie File (To Master a DVD later) with Audio
  • Mixing Audio from different Inputs & Files (Ambience Mics, Signal from the Sound Mixer, Playbacks from my own application) to more than one Mix (eg. one Mix for the Recording, one Mix for Live)
  • Stream that Output Complete or in Parts (e.g. the left Part of the Image) over the Network (For example, Projector 1 is near the Server, so I connect it using DVI, Projector 2+3 is connected to a Computer that receives the streams for that two projectors (with soft edge on each stream) and Screen 4 is outside the Concert Hall and shows the complete Live-Stream.
  • What GUI-Framework should I use for that ?
  • is it perhaps event performant enough to use Java for that ?
  • is it posible to use that mechanism for just rendering (eg. I have stored the cut points on Disc and saved every single camera stream to change some errors later or cut out some parts)

• ffmpeg seeking to I-frame

  7 octobre 2014, par user3398748

  Is it possible to seek to a I-Frame using the av_seek_frame() function.
  The problem I am facing is that if I seek in a AVC file I get a lot of noise if I dont flush the buffer. And if I flush the buffer the decoder dose not return a frame until it comes across a I-Frame which causes problem in the calculation of total frames at the end of file if I am seeking.

  Thank you