Recherche avancée

Sur d’autres sites (8532)

• FFMPEG Install/enable 'libfdk_aac' after installed FFMPEG via PPA

  18 juillet 2017, par Cyberbob

  I have linux MINT 17.3 Kernel 4.4.0-81 all update available. (For different reasons I can’t move to newer version of ubuntu/mint)

  I have installed FFMPEG via PPA (NOT from compiling the source) :

  sudo add-apt-repository ppa:jonathonf/ffmpeg-3 -y
  
  sudo apt-get update
  
  sudo apt-get install -y ffmpeg

  Then I tried to install libfdk-aac with guide :
  https://trac.ffmpeg.org/wiki/CompilationGuide/Quick/libfdk-aac

  sudo apt-get install pkg-config autoconf automake libtool
  
  git clone https://github.com/mstorsjo/fdk-aac.git
  
  cd fdk-aac
  
  ./autogen.sh
  
  ./configure --enable-shared --enable-static
  
  make
  
  sudo make install
  
  sudo ldconfig

  But I’m still receive from FFMPEG : "unknown encoder ’libfdk_aac’"

  How can I check if "libfdk_aac’ is correctly installed and HOW CAN I ACTIVATE / ENABLE the ’libfdk_aac’ on FFMPEG ?

  If is not possible in my situation, and if I’m obliged to remove all ffmpeg and follow this :
  https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu

• Revision 32453 : on renomme xcache en memoization, puisque c’est de ca qu’il s’agit ...

  29 octobre 2009, par fil@… — Log

  on renomme xcache en memoization, puisque c’est de ca qu’il s’agit  http://fr.wikipedia.org/wiki/Memoization (merci a Thomas Sutton)
  le memo filecache.inc se limite a 16^{4 fichiers, ce qui fait qu’il n’y a plus besoin de garbage collector}

• How to optimize video to animated GIF conversion using PHP + shell commands

  15 mars 2012, par user1070798

  I have a web application that converts any video into an animated GIF. The app runs in PHP and the following steps are executed through php's shell_exec :

  1. Scale video to smaller dimensions, if they are large (ffmpeg -i $in -s 200x150 -an $out)
  2. Use ffmpeg to extract 1 jpeg every x seconds (ffmpeg -i $in -ss $ss -vframes 1 $out)

  3. Convert jpegs to animated GIF using imagick (convert -delay $delay -loop 0 $dir/* $out)

     aside - the reason I don't use the ffmpeg gif89a output is because the quality sucks.

  I want to be able to except any major image format, but the most common will probably be .flv (flash) and .avi/.mpg.

  My application runs fine, but I am a perfectionist and it needs to be faster for scalability.

  My web server has 16 cores and I would like to utilize them as much as possible, but .flv multi-threading appears to not be supported by ffmpeg, while .avi and some others are supported. Also, ffmpeg doesn't support multi-threading when outputting to jpegs.

  Does anyone know of any other programs that support multi-threading for .flv and others ? Are there any more efficient methods to create an animated GIF from video, while maintaining relatively decent quality (aka not the 100-color palette that ffmpeg supports) ?

  Also, if anyone knows which codecs might perform best for stages 1 and 2, particularly with flv, I'd love to know. I've done hours of testing, but there are just so many options I haven't come to any solid conclusions.

  ***Update : My online app is working well so far animated gif generator. I would still love to make it faster though, so if anyone has run into similar circumstances... let me know !