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• ffmpeg : 1 frame manipulation on demand

  7 juillet 2013, par Chris Russo

  Hello folks & friends of SO !

  We need to create a small application to take a random frame from a video, and apply some modifications to it, in real time.

  This has to be done in real time, and in order to do that, we wouldn't mind to create some initial delay, before the video starts streaming. So let's assume we have a total of 6 seconds of preloading time, in order to :

  1) extract a keyframe.
  
  2) create an image with it.
  
  3) manipulate the image.
  
  4) replace the original keyframe with the new one.

  The point (3) of the previous algorithm is already solved using GD as a PHP module. However we would need to find a solution for the rest of the procedure in order to accomplish this.

  Please if anyone is available to help us with this, feel free to contact me.

  Thanks in advance ;
  Chris C. Russo

• GStreamer x264enc not found

  5 avril 2017, par Dominik Schreiber

  I installed GStreamer-0.10 and all modules (base, good, bad, ugly, ffmpeg) according to these instructions (browse through by clicking prev/next) :
  http://www.linuxfromscratch.org/blfs/view/svn/multimedia/gst-plugins-ugly.html

  Everything seemed to have worked just fine but when I want to execute my pipeline I got this error :

  glib.GError: no element "x264enc"

  Apparently the module was not installed :

  gst-inspect x264enc
  
  No such element or plugin 'x264enc'

  After that I installed the codec by executing :

  sudo apt-get install x264

  This did not work either. So I installed the latest build manually :
  http://www.videolan.org/developers/x264.html

  After a successful installation of x264 I ran ./configure on the gstreamer-0.10 ugly modules once again and found out about this :

  configure: *** checking feature: x264 plug-in ***
  
  configure: *** for plug-ins: x264 ***
  
  checking for X264... no
  
  configure: No package 'x264' found
  
  configure: *** These plugins will not be built: x264
  
  configure: creating ./config.status

  A check if x264 is available seems to get fullfilled :

  which x264
  
  /usr/local/bin/x264

  I’m using ubuntu server 12.04 LTS. Any ideas what I have to do to compile this module properly ? Thanks !

• GStreamer x264enc not found

  5 avril 2017, par Dominik Schreiber

  I installed GStreamer-0.10 and all modules (base, good, bad, ugly, ffmpeg) according to these instructions (browse through by clicking prev/next) :
  http://www.linuxfromscratch.org/blfs/view/svn/multimedia/gst-plugins-ugly.html

  Everything seemed to have worked just fine but when I want to execute my pipeline I got this error :

  glib.GError: no element "x264enc"

  Apparently the module was not installed :

  gst-inspect x264enc
  
  No such element or plugin 'x264enc'

  After that I installed the codec by executing :

  sudo apt-get install x264

  This did not work either. So I installed the latest build manually :
  http://www.videolan.org/developers/x264.html

  After a successful installation of x264 I ran ./configure on the gstreamer-0.10 ugly modules once again and found out about this :

  configure: *** checking feature: x264 plug-in ***
  
  configure: *** for plug-ins: x264 ***
  
  checking for X264... no
  
  configure: No package 'x264' found
  
  configure: *** These plugins will not be built: x264
  
  configure: creating ./config.status

  A check if x264 is available seems to get fullfilled :

  which x264
  
  /usr/local/bin/x264

  I’m using ubuntu server 12.04 LTS. Any ideas what I have to do to compile this module properly ? Thanks !