[H.261] The H.261 VIC codec does not work with hardware devices like Polycom's. The device complains about invalid sbit/ebit values.
The codec resets the sbit to 0 on a new picture, introducing an apparent discontinuity in the bitstream. However the device expects the bitstream to be continuos (prev.ebit + this.sbit = 8).
The fix is quite simple: just comment out H261PixelEncoder::PreIncEncodeSetup() { ... sbit_ = 0; ... } in "opal\plugins\video\H.261-vic\vic\encoder-h261.cxx".
[G.722] The G.722 codec is never initialized. The codec reports a format of "PCM-16-16kHz" (L16Desc[] in "opal\plugins\audio\G722\g722codec.c") while the plugin manager only accepts "L16" (H323PluginCodecManager::RegisterCodecs() in "h323plus\src\h323pluginmgr.cxx").
Shouldn't the codec report "L16" in the 8 kHz descriptor? Or is there a deeper issue? Replacing "PCM-16-16kHz" with "L16" enables the decoder but not the encoder and the decoder doesn't decode anything.
G.722.2 seems to have the same issue.