Re: [Ekiga-list] black video sent from ekiga on linux mint

[Eugen Dedu <Eugen Dedu pu-pm univ-fcomte fr>]

On 29/08/13 21:11, Alex Frase wrote:
> Hi,
>
> (Apologies if this ends up posting twice; I sent it before subscribing
> and it may have gotten lost in moderation)
>
> I'm trying to use Ekiga v4.0.1 on Linux Mint 15 (based on Ubuntu, based
> on Debian) but can't seem to transmit video via h.323.
>
> I am able to connect to two different h.323 endpoints, and in both cases
> I can see and hear the other side just fine, and they can hear me, but
> they see only a black screen instead of the video from my side.
>
> I know that the camera works and Ekiga recognizes it, because I can see
> my own video preview picture-in-picture. Skype also works just fine for
> both audio and video in both directions.
>
> I can also successfully call the ekiga.net echo test
> (sip:500 ekiga net), and I see my video echo (with a slight delay vs. my
> local video picture-in-picture), so it seems to work okay via SIP. It's
> just over h.323 that the other side does not receive my video.
>
> While connected via h.323, the call tooltip says "Codecs: PCMU - H264";
> when I call the echo test via SIP, the tooltip instead says "Codecs:
> PCMA - H261". I've tried disabling the H264 video codec, but then the
> remote side reports not even seeing a black screen -- instead they just
> see their own camera on the whole screen, as if no video signal is being
> received by them whatsoever. When the H264 codec is enabled, then they
> see their video picture-in-picture on top of a black screen. So perhaps
> the problem is the H264 encoder producing only black frames?

Sorry to answer so late.

You wrote that you see video on your computer.  Do the others see their 
video too?  I ask this because a bug has recently been fixed about not 
seeing video on local computer.

Do the other use ekiga too or not?

So when you call them, nobody sees video, but see black as image, is 
that right?

It is not an error to have H261 on sip echo test, and H264 with the 
others: very likely the others do not support (checked off) H261, hence 
the next one on the list (H264) is chosen.  If they check off H264 as 
well, then no common video codec is found: this is normal too.

Finally, please send us/me a -d 4 log from your machine when you call 
and you see a black image.

--
Eugen