Is this RTMFP delay acceptable?

Question

I have a project that required me to use flash p2p video using RTMFP Flex. When we tested the application the quality was good but there was noticeable delay (1-2s) with the audio and the video. I tweaked the settings to lower the quality to achieve acceptable latency but the clients are comparing it with Skype video.

Is there something that I missed? What is the acceptable latency with rtmfp? Is Skype superior to flash p2p video? Can you list the factors related to my problem?

Answer 1

I have managed to achieve latency around 0.1s, which is not noticeable during conversation. Few tricks, that I have used:

1. Do not use RTMFP groups. They can't handle real time communication because of multicaastWindowDuration.
2. Use bufferTime = 0 on every used NetStream.
3. framesPerPacket = 1 on Microphone.

You could also try videoReliable = false, audioReliable = false on NetStreams.

You should see following resources:

http://www.adobe.com/devnet/flashplayer/articles/acoustic-echo-cancellation.html

http://www.adobe.com/devnet/adobe-media-server/articles/real-time-collaboration.html