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• ffmpeg thumbnails : Every 2 seconds, generated at 0, 1, 3, 5 seconds

  30 janvier 2014, par Jim Miller

  I'm using ffmpeg to generate thumbnails from a piece of .mov video. I want to get thumbnails every two seconds, and so, copying almost directly from https://trac.ffmpeg.org/wiki/Create%20a%20thumbnail%20image%20every%20X%20seconds%20of%20the%20video, I'm doing :

  ffmpeg -i test.mov -f image2 -vf fps=fps=1/2 thumb%04d.jpg

  This works, and gives me thumbnails, but they correspond to the images from the video at 0, 1, 3, 5, ... seconds. I was expecting 0, 2, 4, 6, ... seconds ; I'm not sure why there's an initial one second gap between thumbnails before it settles into making them every two seconds.

  Is there a way to get them to come out at 0, 2, 4, 6... seconds, or is this just "how it works" ? Thanks !

• why I can't compile x264 or ffmpeg downloaded from git [closed]

  4 avril 2013, par Monjura Rumi

  It has been just a few days that I am using x264, ffmpeg and trying to take help from codes in git. I am always having some peculiar problem. It seems like no one or few people faced such problems. Here is one of those problems. If I download x264 or ffmpeg using git then I could not compile that source code. At first terminal will show ./configure: Permission denied. Then If I change permission of configure file using chmod 755 command then it will show ./configure: /bin/bash^M: bad interpreter: No such file or directory. To build x264 and ffmpeg I have followed this link https://github.com/lince/libffmpeg-c/wiki. My attempt to compile x264 has failed. Can you please tell me how can one use source code downloaded from git ?

• ERROR : libvpx decoder version must be >=0.9.1 [closed]

  22 novembre 2013, par Baseem Najjar

  Heyo !
  I'm trying to install ffmpeg on my server using the following tutorial :
  https://ffmpeg.org/trac/ffmpeg/wiki/UbuntuCompilationGuideLucid
  When I reach the ffmpeg part and run the ./configure command it gives the following error :

  ERROR: libvpx decoder version must be >=0.9.1

  I must mention that my server has Ubunto 10.10 64bit
  I'm a total newbie in linux so please take it into consideration :)
  Thanks a lot !

  Following LordNeckBeard solution, I got the following error after the checkinstall :

  root@348588:~/libvpx# sudo checkinstall --pkgname=libvpx --pkgversion="$(date +%Y%m%d%H%M)-git" --backup=no--default --deldoc=yes
  
  
  
  checkinstall 1.6.2, Copyright 2009 Felipe Eduardo Sanchez Diaz Duran
  
             This software is released under the GNU GPL.
  
  
  
  
  
  no--default is an invalid value for --backup
  
  
  
  Use --help or -h to get more information