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mpromonet / v4l2rtspserver

RTSP Server for V4L2 device capture supporting HEVC/H264/JPEG/VP8/VP9
The Unlicense
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RTSP over UDP #252

Closed vikram-hacklab closed 2 years ago

vikram-hacklab commented 3 years ago

Hello friends,

I have been running v4l2rtsp server for over a month now on raspberry pi zero w. It runs smoothly most of the time but sometimes due to network congestion, I start loosing packets and stream becomes very unstable. I am guessing that the stream is currently running over TCP. I understand that the server supports sending data over UDP as well. Can someone guide me on how I can move the stream from TCP to UDP?

Thanks in advance!!

mpromonet commented 3 years ago

Hi,

It seems your are swapping UDP & TCP, when there is data congestion UDP packets are dropped, TCP packets are reemitted.

By default the server is sending RTP/UDP traffic, in order to get TCP traffic, you can ask for this sending the RTSP SETUP, setting Transport to RTP/AVP/TCP.

Best Regards, Michel.

aweussom commented 3 years ago

It’s rather unlikely to be network congestion. It is VERY likely to the the crappy WiFi in the Zero W. Stick to UDP - possibly add keyframes more often?

vikram-hacklab commented 3 years ago

@mpromonet Thank you! I guess I figured out the issue. The packets were getting dropped when too many neighborhood WiFis were streaming data at the same time. Also thank you for the clarification. I had wrongly assumed that the data was transmitted over TCP, by default.

@aweussom I tried changing the keyframes. It did improve things a bit but not too much. Can I modify anything else to improve the stream quality?