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• Adding a text overlay with constant size to a video with varying resolutions using ffmpeg

  22 décembre 2020, par BetaLixT

  I have a video with different resolutions at different points of the video and need to add a text overlay to it. I'm new with ffmpeg, the following is one of the commands I've tried

  


  ffmpeg -i input.mp4 -vf "drawtext=text='Hello World'" -c:a copy output.mp4


  


  But the output has blurry text with it resizing every few seconds (I'm guessing because of the various resolutions in the video) and some parts of the video have their aspect ratios altered.

  


  Information on input file

  


  The input.mp4 video is generated from some .h264 raw data converted to mp4 and some blank mp4 generated that are all concatenated together, following are the commands

  


  h264 to mp4 :

  


  ffmpeg a.h264 -c copy a.mp4


  


  blank mp4

  


  ffmpeg -t 5 -f lavfi -i color=c=black:s=200x200 -c:v libx264 -tune stillimage -pix_fmt yuv420p -video_track_timescale 1200000 b.mp4


  


  Concat :

  


  ffmpeg -safe 0 -f concat -i list.txt -s 720x960 -c copy input.mp4


  


  I'd be thankful for any advice on how I could achieve this

  


• Loading ffmpeg-php module fails

  21 août 2013, par i.h4d35

  I've been trying this for a couple of days now. I am trying to install ffmpeg-php on my CentOS server.

  • OS : CentOS 6
  • PHP : 5.5
  • ffmpeg : 1.2.1
  • ffmpeg-php : 0.6.0

  The ffmpeg installation went on without a hitch and I am able to convert files back and forth via the CLI.

  While installing ffmpeg-php, I encountered errors while making (after configuring) due to time.h references which was corrected by renaming the files creating with an extension .loT to .lo (as rightly pointed out here)

  Once this was done, the make process went on smoothly and the make install went through without a hitch. However, after specifying the extension=ffmpeg.so in the php.ini file and after restarting Apache, the module doesn't load or show up in phpinfo().

  The Apache error log shows only "PHP Warning : PHP Startup : Invalid library (maybe not a PHP library) 'ffmpeg.so' in Unknown on line 0" and nothing else.

  make test also shows the same error and FAILS the associated tests. I've checked here which wasn't very helpful. Also, I read somewhere that it may be the issue with permissions but the permissions for the ffmpeg.so file is 755.

  Any help is appreciated.

  Thanks in advance.

• Install Piwik with 1-click using Installatron

  28 mars 2013, par Piwik team — Community

  We are proud to announce that Piwik Analytics is now available as one click install from Installatron !

  Installatron is a one-click web application installer that enables Piwik and other top web applications to be instantly installed and effortlessly managed. Get Piwik up and running on your website in seconds and discover just how easy Installatron makes it to manage web applications. Piwik installations managed by Installatron can updated (manually or automated), cloned, backed up and restored, edited to change installation parameters, and more.

  

  Many web hosting providers provide Installatron through their web hosting control panel. If Installatron is not available from your provider, you can use Installatron directly from Installatron.com.

  To install Piwik through your web hosting provider’s control panel (if available) :

  • Login to your web host’s control panel,
  • navigate to “Installatron”, click “Piwik”, and choose the “Install this application” option.
  • Change any of the install prompts to customize the install. For
    example, you can choose a different default language for Piwik.
  • Click the “Install” button to begin the installation process. You
    will be redirect to a progress page where you can watch as Piwik is
    installed within a few seconds to your website.

  

  You can also install Piwik directly from Installatron.com, by navigating to Piwik @Installatron and choose the “Install this application” option. After filling in your FTP and Mysql information, you will be redirect to a progress page where you can watch as Piwik is installed within a few seconds to your website. After the installation, you may wish to change your FTP, Mysql password.

  If you experience any problems or want to share your experience using Piwik and Installatron together, email the Installatron team at : feedback (at) installatron.com