[Freeswitch-users] H264 transcoding

Sat Jul 28 17:42:37 MSD 2012

X264 is NOT.

--
Brian West
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On Jul 27, 2012, at 1:44 AM, William King <william.king at quentustech.com>
wrote:

 libvlc is LGPL http://www.videolan.org/press/lgpl.html and there is now a
mod_vlc(though it doesn't yet support video streams). The user can choose
to build vlc with only the LGPL components or add the more 'adverse'
modules. In none of the LGPL packages of libvlc is ffmpeg enabled, but
there is a module for libvlc for ffmpeg. http://wiki.videolan.org/FFmpeg

The only pieces now may just be the FS side of things for video.

William King
Senior Engineer
Quentus Technologies, INC
1037 NE 65th St Suite 273
Seattle, WA 98115
Main:   (877) 211-9337
Office: (206) 388-4772
Cell:   (253) 686-5518william.king at quentustech.com

On 07/26/2012 08:46 PM, Anthony Minessale wrote:

you would probably need to do something like make a mod for ffmpeg
that protects you from the gpl then allow the user to build that lib
on his own and choose at compile time to install patented or adverse
licensed components.  No license rules prohibit an end user from
combining code only distributors.

but even then we need a bunch of code to write.

On Thu, Jul 26, 2012 at 10:41 PM,
curriegrad2004<curriegrad2004 at gmail.com> <curriegrad2004 at gmail.com>
wrote:

 Ken,

If you think those guys over at x264 will ever change the license from
GPL to LGPL, you're just dreaming the pie in the sky...

In short, don't even think about it ;P

On Thu, Jul 26, 2012 at 8:19 PM, Ken Rice <krice at freeswitch.org>
<krice at freeswitch.org> wrote:

 we can not and will not use GPL software, the license is not
compatible with the GPL and would polute the codebase with additional
restrictions that are not wanted or needed. now if someone could get
them to change the license or atleast give us a license under better
terms such as the LGPL or the MPL then the license issue would be null

Ken
Sent from my iPad

On Jul 26, 2012, at 7:45 PM, Terry Barnum <terry at digital-outpost.com>
<terry at digital-outpost.com> wrote:

 Use x264? http://en.wikipedia.org/wiki/X264

On Jul 26, 2012, at 4:53 PM, Ken Rice wrote:

 Is it possible sure... Is ot probably to happen anytime soon? Not until the
patents run out...

On 7/26/12 5:04 PM, "yufei.tao" <yufei.tao at redembedded.com>
<yufei.tao at redembedded.com> wrote:

 Hi

I am trying to decide if it is feasible to let FS do transcoding between
different H264 formats for live video calls. This is because I've got
SIP clients that both use H264 but with different formats and one (with
a bad H264 decoder) has problems decoding H264 stream from the other.
But each of these two clients communicate fine using H264 with a third
client that uses ffmpeg. I'm thinking of adding a module which uses
ffmpeg, so that it will transcode H264 between different parameters.

I've got a few questions:

1. Is this feasible? I'm not looking at supporting many simultaneous calls.
2. What is involved in transcoding real-time video stream?
3. Anyone's done anything like this before?

I'm new to FS and any suggestions would be very much appreciated!

Yufei

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