[Freeswitch-users] Video with mod_conference

[Adam Ben-Ayoun]

Hi guys,

I am experimenting with mod_conference and video, I have a conference (not
in video-bridge mode), I am connecting with 2 clients using SIPjs, my goal
is to have video from client1 to client2.

Here is what I'v tried:
Assume client1 is the broadcaster while client2 is the receiver. Client1
connects to the conference first, he is floor at this point:
freeswitch at internal> conference list
Conference 1234-172.30.3.212 (2 members rate: 16000 flags:
running|answered|enforce_min|dynamic|exit_sound|enter_sound)
1;sofia/internal/anonymous.2po4ni at anonymous.invalid
;7c8e7494-decc-11e4-93cd-2391a0614a29;anonymous.2po4ni;anonymous.2po4ni;video|floor;0;0;0;0

Now, client2 joins in, as expected, client1 is still floor:
freeswitch at internal> conference list
Conference 1234-172.30.3.212 (2 members rate: 16000 flags:
running|answered|enforce_min|dynamic|exit_sound|enter_sound)
2;sofia/internal/anonymous.hgbmm4 at anonymous.invalid
;80a2f38e-decc-11e4-93d3-2391a0614a29;anonymous.hgbmm4;anonymous.hgbmm4;video;0;0;0;0
1;sofia/internal/anonymous.2po4ni at anonymous.invalid
;7c8e7494-decc-11e4-93cd-2391a0614a29;anonymous.2po4ni;anonymous.2po4ni;video|floor;0;0;0;0

No video goes through to client2. Now, if I am setting client2 as floor and
then setting back client1 as floor, video start to come in.. And just
before the video starts, the log shows that client2's video DTLS handshake
becomes READY:
2015-04-09 15:24:40.391590 [DEBUG] switch_core_media.c:4361
sofia/internal/anonymous.2po4ni at anonymous.invalid Video thread resumed
 Echo is off
2015-04-09 15:24:41.851825 [INFO] switch_rtp.c:2923 Changing video DTLS
state from HANDSHAKE to SETUP
2015-04-09 15:24:41.851825 [INFO] switch_rtp.c:2831 video Fingerprint
Verified.
2015-04-09 15:24:41.851825 [INFO] switch_rtp.c:3373 Activating Video Secure
RTP SEND
2015-04-09 15:24:41.851825 [INFO] switch_rtp.c:3351 Activating Video Secure
RTP RECV
2015-04-09 15:24:41.851825 [INFO] switch_rtp.c:2871 Changing video DTLS
state from SETUP to READY

In addition, even before doing the floor toggle to get the video going, I
see mod_conference's video thread doing:
switch_core_session_write_video_frame(imember->session,
vid_frame, SWITCH_IO_FLAG_NONE, 0); on line 2991.

Something in the video thread seems to delay/lock the video DTLS
handshake....

Any idea?

Thanks!
Adam
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