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• Can I dynamically call a LGPL/GPL software in my closed-source application ? [closed]

  29 juin 2016, par marcgg

  I want to use a tool (ffmpeg) that is under GNU Lesser General Public License, version 2.1 GNU General Public License (GPL) version 2 for some components.

  To do so, I only call it in my software as such :

  System.Diagnostics.Process p = new System.Diagnostics.Process();
  
  p.StartInfo = new System.Diagnostics.ProcessStartInfo("lgplSoftware.exe", myParams);
  
  p.Start();

  I do not change it, I only use a built version of the software for windows.

  ---

  Wikipedia says :

  A key dispute related to the GPL is
  whether or not non-GPL software can be
  dynamically linked to GPL libraries.
  The GPL is clear in requiring that all
  derivative works of code under the GPL
  must themselves be under the GPL.
  While it is understood that static
  linking produces derivative works, it
  is not clear whether an executable
  that dynamically links to a GPL code
  should be considered a derivative work
  (see Weak Copyleft). The
  free/open-source software community is
  split on this issue. The FSF asserts
  that such an executable is indeed a
  derivative work if the executable and
  GPL code "make function calls to each
  other and share data structures,"
  with certain others agreeing (e.g.
  Jerry Epplin), while some (e.g.
  Linus Torvalds) agree that dynamic
  linking can create derived works but
  disagree over the circumstances.

  ---

  I am really confused by all this legal things. I would have made my project LGPL as well and released the source, but this is not up to me.

  So the question is : can I use it like I’m doing right now or will I be executed by an army of lawyers ?

• Create DVD-Video Menu's with ff-mpeg

  28 février 2012, par Bat Masterson

  Is it possible to create a DVD-Video Menu with ff-mpeg only ?

  I may be misunderstanding but I don't think that ff-mpeg alone is capable of creating a dvd menu.

  I've found some examples using ff-mpeg and various other tools but nothing solely ff-mpeg. The other tools are all linux and I'm stuck in windows.

  If someone would clear that up for me that would be great. Also if you know of a library for creating dvd menus or a command line utility would also help.

  Thanks In Advance

• FFMPEG : Encoding MKV to Prores, resulting in asynchronous audio

  23 juin 2015, par Simon

  I don’t know if it’s the "best" way to do it, but for being able to use Bluray material in Avid, I’m converting M2TS files to Prores quicktimes.

  I’m using Another GUI with following parameters :

  -i "<fullsourcefilename>" -y
  
  
  
  -map 0:v
  
  -map 0:a:4
  
  
  
  -vcodec prores -profile:v 3
  
  -acodec pcm_s16le -ac 2
  
  
  
  "<outputpath><outputfilename>_prores.mov"
  
  </outputfilename></outputpath></fullsourcefilename>

  This works for M2TS files, but when doing the same for MKV ones, I still get the video and audio, but the audio is not synced with the picture anymore.

  Is this a known issue, or how to fix it ?
  I would need the most efficient/fastest way (so not too complicated, because it should be clear to users what to do).
  Thank you !