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Only codecs supported by both sides of the call should be left, in this case it is VP8 and PCMA (alaw).
5. There is no sound in browser if caller makes an audio+video call and callee responds with audio only
Symptoms: there is no sound in caller browser if caller makes an audio+video call (for instance, using Phone Video example) and callee responds with audio only (for instance, a call to IVR)
Solution: update WCS to build 5.2.1672 and enable video frames generator
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generate_av_for_ua=all |
6. IVR greeting plays not from beginning if caller makes audio+video call
Symptoms: there is a gap before IVR greeting starts playing if caller makes an audio+video call (for instance, using Phone Video example)
Solution: update WCS to build 5.2.1755 and reduce video frames generator start timeout
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generate_av_for_ua=all
rtp_generator_start_timeout=100 |
7. An excessive video transcoding to VP8 starts when making a call between browsers
Symptoms: a video traffic is receiving from SIP server in H264 codec, but video is playing as VP8 in browser
Solution:
a) add the following parameter to WCS settings
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profiles=42e01f,640028 |
b) add the following parameter if above does not help
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proxy_use_h264_packetization_mode_1_only=false |