Raspi 2+logitech c920+gstreamer

[Sérgio Agostinho]

Hi Brad,

1 - If you simply do this

gst-launch-1.0 -v v4l2src device=/dev/video0 ! queue ! \
video/x-h264,width=640,height=480,framerate=30/1 ! h264parse ! avdec_h264 !
autovideosink sync=false text-overlay=false

Is the quality and latency ok?

2 - The rtpjitterbuffer element is buffering and therefore it will always
introduce some latency in the pipeline. You can adjust this latency to your
needs through its "latency" property. For your initial tests you might as
well just remove it from the pipeline to get a baseline in terms of
latency.

3 - When setting the capsfilter after the udpsrc, you should try and copy
the exact caps you get from the udpsink sink pad, in the sender pipeline.

4 - If possible make sure the pc and raspi are connected through ethernet,
just to be sure it's not your wifi.

Cheers

2015-03-19 5:03 GMT+01:00 Brad Turnbough <brad.turnbough at gmail.com>:

> I'm trying to use gstreamer on a fresh install Raspi 2.  I'm streaming the
> feed to a laptop via rtp/udp.
>
> It is my understanding that the c920 has a native h264 encoder, which
> should help in terms of performance, however I'm seeing artifacts and lag.
>
> On the pi that I'm streaming the video from, I'm using the following
> pipeline:
>
> gst-launch-1.0 -v v4l2src device=/dev/video0 ! queue ! \
> video/x-h264,width=640,height=480,framerate=30/1 ! h264parse ! rtph264pay \
> pt=127 config-interval=3 ! udpsink host=10.0.0.19 port=50000
>
> On the pc displaying the video, I'm using this pipeline:
>
> gst-launch-1.0 -e -v udpsrc port=50000 ! application/x-rtp, payload=96 !
> rtpjitterbuffer ! rtph264depay ! avdec_h264 ! autovideosink sync=false
> text-overlay=false
>
> Why does the quality suck and why is it so latent?
>
> I apologize for posting this again.  I lost the original thread and
> response.
>
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>
>
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