On Fri, 2009-07-10 at 00:39 +0300, George Kiagiadakis wrote:
> First, I have tried doing calls between my client (on the desktop) and google
> talk (on the laptop). This scenario mostly works, I get correct audio on both
> sides, but after a while (~30 seconds or so) the audio stream from my client
> stops being delivered to gtalk and instead I get a continuous noise (always
> the same) on gtalk.
>
> Second, I have tried doing calls between my client and empathy. In this case,
> although they connect fine, I don't get any audio on either side, instead I
> get
> a "tak tak tak" noise with exactly 1 Hz frequency. This noise seems to be
> coming from FsConference itself. I'll try to explain what makes me believe
> that: I have a gstreamer pipeline that looks like this:
>
> audiosrc -> volume -> FsConference -> liveadder -> audioresample -> volume ->
> audiosink
>
> (audiosrc and audiosink can be anything. I have tried so far autoaudio{src,
> sink}, alsa{src,sink}, oss{src, sink} and audiotestsrc.)
>
> Empathy has a similar one that looks like this:
>
> gconfaudiosrc -> volume -> level -> FsConference -> liveadder ->
> audioresample
> -> volume -> gconfaudiosink
>
> The only practical difference is the "level" element, which apparently feeds
> a
> small visualization widget on the empathy window that shows the level of the
> audio coming from the microphone.
>
> Both sides receive this "tak" noise. Now, if I mute one side by setting the
> volume on the "volume" element of the input to 0, the other side stops
> getting
> the noise. However, increasing the volume doesn't make any significant
> difference. An important detail is that the visualization widget on empathy
> reacts to the microphone and is not synchronized with the noise that I get on
> the other side. So, that leads me to the conclusion that the FsConference
> element somehow gets correct audio from the input and transforms it into this
> noise. Thus, if it gets no audio, there is no noise.
>
> The same exactly happens when I am trying to make calls with my client on
> both
> sides. However, calls with empathy on both sides work fine. This makes me
> wonder what can be wrong with my client. Both my client and empathy are very
> similar applications, both using telepathy, telepathy-farsight, gstreamer and
> even (almost) the same pipeline.
>
> Does anybody have any clue? What can be wrong?This is strange, all that FsRtpConference does to audio is to encode/decode it. Which codec is used? -- Olivier Crête olivier.cr...@collabora.co.uk
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