[Freeswitch-dev] Freeswitch chooses the first codec and ignores the rest

Wed Sep 25 19:29:14 MSD 2013

You should make sure you all meet and everyone is coordinated.

On Wed, Sep 25, 2013 at 7:57 AM, Paulo Vicentini
<vicentini.paulo at gmail.com>wrote:

> Hi,
> I will start to work on video transcoding as well
>
> transcoding code could be added to video_bridge_thread ( in the core,
> keeping consistency with audio_bridge_thread)
> Or
> It could trigger an application module that would be responsible for video
> transcoding (modularity)
>
>
>
>
>
>
> On Mon, Sep 23, 2013 at 4:05 PM, Seven Du <dujinfang at gmail.com> wrote:
>
>> Sam your code is a good start and I'm sure you'll get how FreeSWITCH is
>> built soon. Let's find a time talk.
>>
>> --
>> Seven Du
>> http://www.freeswitch.org.cn
>> http://about.me/dujinfang
>> http://www.dujinfang.com
>>
>> Sent with Sparrow <http://www.sparrowmailapp.com/?sig>
>>
>>  On Monday, September 23, 2013 at 4:05 PM, Sam Russell wrote:
>>
>> I'd be keen for that. I'm not a software engineer, but I've managed to
>> get libavcodec transcoding VP8-H264 from file to file (
>> https://github.com/samrussell/vodec) - I'd just need to get my head
>> around how freeswitch is built.
>>
>>
>> On Sat, Sep 21, 2013 at 6:58 AM, Anthony Minessale <
>> anthony.minessale at gmail.com> wrote:
>>
>> Yes Seven Du and I are discussing this project right now.
>> Video codecs will require some more core functionality to perform the
>> actual transcoding etc but yes we are interested in this.
>> Maybe we can setup a discussion.
>>
>>
>>
>> On Thu, Sep 19, 2013 at 9:24 PM, Sam Russell <sam.h.russell at gmail.com>wrote:
>>
>> Thanks for this Anthony - I'm still on the stable branch which doesn't
>> seem to support this, but I'll get it upgraded to HEAD and test this & your
>> new patch too.
>>
>> On the topic of codecs, has there been much thought given to video
>> transcoding? I've seen references to a "mod_ffmpeg" floating around, and
>> I've done a bit of transcoding work with libavcodec myself - it seems
>> doable, and the little bit that I've looked at the freeswitch codec
>> examples looks really extensible. If I were to write codecs for H264 and
>> VP8 (and maybe H263+ too), would they be something that you'd try to
>> incorporate into the main project, or would it be better to have as a
>> third-party mod due to the extra hassle of having to build with
>> libav(codec|format|util)?
>>
>>
>> On Fri, Sep 20, 2013 at 9:18 AM, Anthony Minessale <
>> anthony.minessale at gmail.com> wrote:
>>
>> I'd say its relatively hard.  Easier in master which is the only place it
>> would be possible to do but it requires some heavy mods to the media engine
>> and the rtp stack to track all the payloads and switch between them.
>>
>> I do think there is another workaround if you set this profile param:
>>
>> rtp-autofix-pt=true
>>
>>
>> That will detect when its not the one FS thinks and it will reinit the
>> codec.
>>
>>
>>
>>
>>
>>
>>
>> On Thu, Sep 19, 2013 at 4:10 PM, Sam Russell <sam.h.russell at gmail.com>wrote:
>>
>> Thanks for the quick reply Anthony.
>>
>> Do you think this is a hard/easy thing to implement? I'm keen to
>> contribute a bit to freeswitch, and this is functionality that I'd like to
>> write some code for, and I can do what I like with our office PBX so I can
>> test it here too.
>>
>>
>> On Fri, Sep 20, 2013 at 8:56 AM, Anthony Minessale <
>> anthony.minessale at gmail.com> wrote:
>>
>> We currently only support one codec in 200OK  The workaround for this is
>> to only offer it PCMU so it has no choice.
>>
>>
>>
>> On Thu, Sep 19, 2013 at 2:52 PM, Sam Russell <sam.h.russell at gmail.com>wrote:
>>
>> I've had a couple of calls recently that have been a little weird -
>> here's the scenario:
>>
>> A (local freeswitch) sends invite with PCMU, PCMA as codecs
>>
>> B (foreign) sends 200 OK with PCMA, PCMU as codecs
>>
>> Freeswitch sees the response and sets audio codec to PCMA, but other
>> end sends us PCMU (as it was our first choice in this case - sometimes
>> they choose a random one that both of us support).
>>
>> RTP is fine with this - each packet refers to the # of the codec
>> (either standard or a reference to an rtpmap from the SDP), but
>> freeswitch doesn't like it - it forwards the PCMA from my soft phone,
>> but the PCMU coming in from the foreign phone gets dropped by
>> freeswitch and doesn't get forwarded onto my soft phone (packet trace
>> shows freeswitch being the black hole).
>>
>> Debug output shows freeswitch setting the audio codec, and I suspect
>> this means it then only accepts RTP with that codec, instead of
>> handling all codecs that it offered in its invite.
>>
>> Is this expected behaviour? I went trawling through RFCs yesterday and
>> nothing jumped out at me, and I'm seeing this on a couple of call
>> managers - also sometimes the other end will send H263+ even though
>> both ends offered H264 as preferred, and freeswitch drops this in the
>> same manner. I think freeswitch should be handling all codecs that it
>> offers, especially for video when it only does pass through, so
>> spinning up instances of extra "codecs" shouldn't create much
>> overhead.
>>
>> Sent from my iPhone
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
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>>
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>>
>>
>>
>>
>> --
>> Anthony Minessale II
>>
>> FreeSWITCH http://www.freeswitch.org/
>> ClueCon http://www.cluecon.com/
>> Twitter: http://twitter.com/FreeSWITCH_wire
>>
>> AIM: anthm
>> MSN:anthony_minessale at hotmail.com
>> GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com
>> IRC: irc.freenode.net #freeswitch
>>
>> FreeSWITCH Developer Conference
>> sip:888 at conference.freeswitch.org
>> googletalk:conf+888 at conference.freeswitch.org
>> pstn:+19193869900
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://wiki.freeswitch.org
>> http://www.cluecon.com
>>
>> FreeSWITCH-dev mailing list
>> FreeSWITCH-dev at lists.freeswitch.org
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
>> http://www.freeswitch.org
>>
>>
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://wiki.freeswitch.org
>> http://www.cluecon.com
>>
>> FreeSWITCH-dev mailing list
>> FreeSWITCH-dev at lists.freeswitch.org
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
>> http://www.freeswitch.org
>>
>>
>>
>>
>> --
>> Anthony Minessale II
>>
>> FreeSWITCH http://www.freeswitch.org/
>> ClueCon http://www.cluecon.com/
>> Twitter: http://twitter.com/FreeSWITCH_wire
>>
>> AIM: anthm
>> MSN:anthony_minessale at hotmail.com
>> GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com
>> IRC: irc.freenode.net #freeswitch
>>
>> FreeSWITCH Developer Conference
>> sip:888 at conference.freeswitch.org
>> googletalk:conf+888 at conference.freeswitch.org
>> pstn:+19193869900
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://wiki.freeswitch.org
>> http://www.cluecon.com
>>
>> FreeSWITCH-dev mailing list
>> FreeSWITCH-dev at lists.freeswitch.org
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
>> http://www.freeswitch.org
>>
>>
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://wiki.freeswitch.org
>> http://www.cluecon.com
>>
>> FreeSWITCH-dev mailing list
>> FreeSWITCH-dev at lists.freeswitch.org
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
>> http://www.freeswitch.org
>>
>>
>>
>>
>> --
>> Anthony Minessale II
>>
>> FreeSWITCH http://www.freeswitch.org/
>> ClueCon http://www.cluecon.com/
>> Twitter: http://twitter.com/FreeSWITCH_wire
>>
>> AIM: anthm
>> MSN:anthony_minessale at hotmail.com
>> GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com
>> IRC: irc.freenode.net #freeswitch
>>
>> FreeSWITCH Developer Conference
>> sip:888 at conference.freeswitch.org
>> googletalk:conf+888 at conference.freeswitch.org
>> pstn:+19193869900
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://wiki.freeswitch.org
>> http://www.cluecon.com
>>
>> FreeSWITCH-dev mailing list
>> FreeSWITCH-dev at lists.freeswitch.org
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
>> http://www.freeswitch.org
>>
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://wiki.freeswitch.org
>> http://www.cluecon.com
>>
>> FreeSWITCH-dev mailing list
>> FreeSWITCH-dev at lists.freeswitch.org
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
>> http://www.freeswitch.org
>>
>>
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> 
>> 
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://wiki.freeswitch.org
>> http://www.cluecon.com
>>
>> FreeSWITCH-dev mailing list
>> FreeSWITCH-dev at lists.freeswitch.org
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
>> http://www.freeswitch.org
>>
>>
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> 
> 
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://wiki.freeswitch.org
> http://www.cluecon.com
>
> FreeSWITCH-dev mailing list
> FreeSWITCH-dev at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
> http://www.freeswitch.org
>
>

-- 
Anthony Minessale II

FreeSWITCH http://www.freeswitch.org/
ClueCon http://www.cluecon.com/
Twitter: http://twitter.com/FreeSWITCH_wire

AIM: anthm
MSN:anthony_minessale at hotmail.com
GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com
IRC: irc.freenode.net #freeswitch

FreeSWITCH Developer Conference
sip:888 at conference.freeswitch.org
googletalk:conf+888 at conference.freeswitch.org
pstn:+19193869900
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