UAVcast-Pro Video Stream

jfregeau

Hey guys,

We were having issues with packet loss while streaming via UDP. Our stream would intermittently cut to a grey screen. Our bandwidth is 1 Mbits/s. Do you guys have any suggestions about how we could fix this issue?

We were thinking of adding a buffer to the Gstreamer pipeline but we don't know the transmitting end.

thank you very much

Sinamics

jfregeau HI
Could you please tell me which version of UAVcast-Pro you currently using?
HD Video requires a minimum of 6Mbits/s for good quality, so you need to check you bandwith.

I added buffer management in version 2.0.6 You need to use the pipeline described in docs section to fully take advantage of of that on your GCS side.
https://docs.uavmatrix.com/pages/Camera/#windows

jfregeau

Sinamics
Thanks for the quick reply,

we're using version 2.0.61 and we're only trying to stream in 240p.

Is there a way we could see the full transmitting pipeline so that we could increase the buffer?

Thanks!

Sinamics

Could you please tell which camera you use?
You can play with the rtpjitterbuffer on the receiver end.

                   Enum "RTPJitterBufferMode" Default: 1, "slave"
                       (0): none             - Only use RTP timestamps
                       (1): slave            - Slave receiver to sender clock
                       (2): buffer           - Do low/high watermark buffering
                       (4): synced           - Synchronized sender and receiver clocks

Like this
... ! rtpjittrbuffer mode=0 ! ...

jfregeau

Thanks,

I almost have it working, but when I use this pipeline:
gst-launch-1.0 -v udpsrc port=5100 caps="application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264" ! rtpjitterbuffer mode=2 ! rtph264depay ! avdec_h264 ! videoconvert ! autovideosink sync=false

it gets stuck here:
C:\gstreamer\1.0\x86\bin>gst-launch-1.0 -v udpsrc port=5100 caps="application/x-
rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264" ! r
tpjitterbuffer mode=2 ! rtph264depay ! avdec_h264 ! videoconvert ! autovideosink
sync=false
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
/GstPipeline:pipeline0/GstUDPSrc:udpsrc0.GstPad:src: caps = application/x-rtp, m
edia=(string)video, clock-rate=(int)90000, encoding-name=(string)H264
/GstPipeline:pipeline0/GstRtpJitterBuffer:rtpjitterbuffer0.GstPad:sink: caps = a
pplication/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(str
ing)H264
Setting pipeline to PLAYING ...
New clock: GstSystemClock
buffering... 100%

is there some other part of the pipeline I am missing?

jfregeau

we are using a picam

Sinamics

jfregeau I would like to help you remotely.
Please let me know when you have time, and i can look into this

jfregeau

Hey @Sinamics ,

I am free from now on.
Thank you very much for your help