com.unity.webrtc
com.unity.webrtc copied to clipboard
Unity-Technologies
[BUG] RTCDataChannel bandwidth caps based on ping
Hello, It appears that sending byte[] RTCDataChannel seems to hard cap based on ping. For instance, I have 40mbps download to an instance that has a ping of 119ms when transmitting video.
However, when sending data through RTCDataChannel, it locks at around 10mbps. Any thoughts as to why this is? How would we resolve the issue?
@ZeoWorks Hi, I would like to know how you tested for checking this issue.
Thanks, I'm simply sending 110kb worth of data every frame (void update) using channel.Send(byte[]). I have a suspicion it's to do with fragmentation, does this webRTC package automatically fragment packages? Thanks again.
@ZeoWorks I read the article and the problem might be complex. https://developer.mozilla.org/en-US/docs/Web/API/WebRTC_API/Using_data_channels#understanding_message_size_limits
InitProperty might be changed the limitation. https://stackoverflow.com/questions/40129119/what-is-the-upload-bandwidth-limit-over-webrtc-data-channels
@qleguennec Sorry but there is no progress. I would like to know what kind of issues you have about this.
Hello @karasusan , my use case is sending unity game frames to chrome through a webrtc data channel.
The issue is when I increase the size of the data being sent through channel.Send(), the channel closes in unity, but stays open in chrome, without any error message in either side. Any idea why? It seems related to @ZeoWorks issue.
edit: need to mention, this is only localhost
@qleguennec Thanks for your reply. How large is the data to send? I will check the issue the next milestone.
@karasusan It could be as large as 1366 * 768 * 4 bytes, but ideally we'll switch to 1600 * 900 * 4.