Q. Why is Cisco making both source and binary versions
available?
A: The source code is available so that an implementation of H.264
is available for the community to use across any project, and to
leverage the community to make the codec better for all. We have
selected licensing terms that allow for this code to be used in
commercial products as well as open source projects. In order for
Cisco to be responsible for the MPEG LA licensing royalties for the
module, Cisco must provide the packaging and distribution of this code
in a binary module format (think of it like a plug-in, but not using
the same APIs as existing plugins), in addition to several other
constraints. This gives the community the best of all worlds - a team
can choose to use the source code, in which case the team is
responsible for paying all applicable license fees, or the team can
use the binary module distributed by Cisco, in which case Cisco will
cover the MPEG LA licensing fees.
Q. Where can I learn more about this source and binary
license?
A: There is a short video at https://vimeo.com/cullenfluffyjennings/openh264-ipr.
Q: Is Cisco guaranteeing that it will pay other licensing
fees for H.264, should additional patent holders assert claims in the
future?
A: Cisco is providing no such guarantee. We are only
covering the royalties that would apply to the binary module under
MPEG LA's AVC/H.264 patent pool.
Q: If I use the source code in my product, and then
distribute that product on my own, will Cisco cover the MPEG LA
licensing fees which I'd otherwise have to pay?
A:
No. Cisco is only covering the licensing fees for its own binary
module, and products or projects that utilize it must download it at
the time the product or project is installed on the user's computer or
device. Cisco will not be liable for any licensing fees incurred by
other parties.
Q. I'm a competitor of Cisco making a
commercial product. Can I still take advantage of the H.264 module in
my project?
A: Yes. If everyone has at least one video
codec in common, our products will be able to communicate. That
increases the number of other people everyone's products can talk
to. The network effect helps everyone.
Q. How will the open source project be governed?
A: We will form a board consisting of leaders from the open source
community as well as Unified Communication vendors.
Q. What source code license is used?
A: Two-Clause BSD license.
Q. Where will the source code repository be hosted?
A: It is at https://github.com/cisco/openh264.
Q. Which profiles of H.264 will be supported?
A: The initial code has the baseline profile. We look forward to
working with the open source community to add high profile and
others.
Q. What platforms will your binaries support?
A: Our initial plan is to support Linux (x86 and ARM), Windows (XP
forward), OSX, and Android. The governance board can decide to add
additional platforms. As long as there are ports of the source code
and automatic build scripts contributed as part of the open source,
we do not see difficulties in adding additional platforms.
Q. iOS is noticeably absent from the list of
platforms. Why is that?
A: Unfortunately, iOS does
not allow for applications to fetch and install modules from the
Internet once that application has been installed on the device.
Recently, in iOS 8, Apple has provided an update to their
Video Toolbox Framework
that gives developers direct access to H.264/AVC hardware encoding and decoding.
Q. How can developers downloading OpenH264 binaries to their applications
be reassured the package only contains the matching revision of the OpenH264 code?
A: The best approach will be for the OpenH264 community to ultimately co-develop an automated
process to make the binaries from the project's source code on a public, infrastructure service.
The automation tools could be developed and stored in github and a log of each build published
for the benefit of everyone to ensure the builds only contain OpenH264 code.
In the meantime, Mozilla has built the binaries used by Firefox and Cisco has built binaries for
general application use. Cisco's development practices are focused on delivering trustworthy
products and systems and strictly prohibit any intentional behaviors or features that allow
unauthorized access, exposure of sensitive device information, or bypass of security measures.
Q. What email list can developers use to discuss work on
this project?
A: We are using the email
list at [email protected] - Subscribe at https://groups.google.com/d/forum/openh264-dev.
Q. What license will be used for the binary?
A: Cisco provides the binary under the terms of a two-clause BSD license. Additionally, the binary
is licensed under Cisco’s AVC/H.264 Patent Portfolio License from MPEG LA, at no cost to you,
provided the requirements and conditions listed in the AVC/H.264 Patent Portfolio sections are met.
Please see the full binary license text
at https://www.openh264.org/BINARY_LICENSE.txt.
Q. My application doesn't have an end-user license agreement, so where must I
reproduce all of the binary license text?
A: In the same location where any other licensing information is to be presented to the user.
Some examples include in a "description," "about" or "licenses" section or file.
Q. How many back revisions of the binary will kept available for download?
A: Initially, all back revisions of the binary will be available for download. Any exceptions or
changes to that plan in the future will be vetted with the community and governance board.
Q. How do I have my application link to the binary module
for downloading to users?
A: Please reference the
RELEASES file in the main directory of the openh264 github
repository at
https://github.com/cisco/openh264/blob/master/RELEASES or the
release list in the github repository at
https://github.com/cisco/openh264/releases.