2. Basic Permissions.
All rights granted under this License are granted for the term of
copyright on the Program, and are irrevocable provided the stated
conditions are met. This License explicitly affirms your unlimited
permission to run the unmodified Program. The output from running a
covered work is covered by this License only if the output, given its
content, constitutes a covered work. This License acknowledges your
rights of fair use or other equivalent, as provided by copyright law.
You may make, run and propagate covered works that you do not
convey, without conditions so long as your license otherwise remains
in force. You may convey covered works to others for the sole purpose
of having them make modifications exclusively for you, or provide you
with facilities for running those works, provided that you comply with
the terms of this License in conveying all material for which you do
not control copyright. Those thus making or running the covered works
for you must do so exclusively on your behalf, under your direction
and control, on terms that prohibit them from making any copies of
your copyrighted material outside their relationship with you.
Conveying under any other circumstances is permitted solely under
the conditions stated below. Sublicensing is not allowed; section 10
makes it unnecessary.
Do you think people will mind clicking through two additional installers, after the game installer?
sorry for the delayed response. Xvid is published under the GNU General
Public License (GPL). The GPL permits you to use, modify and redistribute
the program free of charge. The GPL however also requires you to distribute
a combined work of a GPLed software and some other software as a whole
under the GPL again. So if you don't want to publish your program under the
GPL you should refrain from distributing it together with Xvid.
You can read more about the GPL license in our license FAQ. It should
answer most of your questions:
It is important to understand the difference between using and distributing
a software. The GPL does not restrict your usage (means the act of "running
the program"). So there is no problem with your proprietary program _using_
Xvid at runtime if it happens to be installed on the user's computer. There
are restrictions however in case you want to redistribute Xvid. Precisely:
If you distribute Xvid (also just a seperate installer) together with some
other application for use in combination this will make up a derived work
and the GPL requests you to publish the whole package under the GPL.
If you do not want to publish your app under the GPL simply refrain from
distributing it together with GPLed programs. You can implement support
for Xvid in your application and use Xvid for playback if it's present at
runtime. You can also advice your users that they should install Xvid in
order to make best use of your program. You should however not distribute
Xvid together with your app if you do not want to publish your program
under the GPL as well.
You are not legally able to distribute Xvid itself OR Xvid encoded videos with a commercial game in the United States.
Q. What is the license for Theora?
Theora (and all associated technologies released by the Xiph.org Foundation) is released to the public via a BSD-style license. It is completely free for commercial or noncommercial use. That means that commercial developers may independently write Theora software which is compatible with the specification for no charge and without restrictions of any kind.
What is Theora
Q. What is Theora?
Theora is an open video codec being developed by the Xiph.org Foundation as part of their Ogg project (It is a project that aims to integrate On2's VP3 video codec, Ogg Vorbis audio codec and Ogg multimedia container formats into a multimedia solution that can compete with MPEG-4 format).
Theora is derived directly from On2's VP3 codec; currently the two are nearly identical, varying only in framing headers, but Theora will diverge and improve from the main VP3 development lineage as time progresses.
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