[Freeswitch-users] H264 transcoding

[Seven Du]

I patched libvlc and it can now decode any video vlc supported and encode with x264 and send to any sip phone. Specifically I'm trying to use it to play a 1080p stream and resize to CIF or D1 so a video phone will accept(Sending 1080p will cause some phones to reboot  :( ).

Still need a lot of code to make it working neatly, however, I might can do a demo on ClueCon and @William if you'd like to review the code and merge into tree I'll happy to contribute that later.


On Friday, July 27, 2012 at 2:43 PM, William King 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) 686-5518 william.king at quentustech.com (mailto:william.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> (mailto: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> (mailto: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> (mailto: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> (mailto: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 _________________________________________________________________________ Professional FreeSWITCH Consulting Services: consulting at freeswitch.org (mailto:consulting at freeswitch.org) http://www.freeswitchsolutions.
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