Sending data using UDPSINK/UDPSRC

[tantor2012]

Hi,

I am trying to use udpsink/udpsrc to send and receive RGB images of size 320x240x3.

Sending:
In the sink I have our own source plugin which
 - captures image from our camera
 - places in a buffer of the image size.

I connect the output of this to gst-launch -v srcplugin ! udpsink port=2000

Receiving"
we have our own sink plugin which is supposed to just get the data. the pipeline here is gst-launch udpsrc port=2000 ! sinkplugin ! filesink location=test.txt

The receiving part just waits and nothing is written to the file.

Instead of our own plugins i have tried to use appsrc and appsink with the same result. Nothing is written to the file.

How can we achieve this? The aim is to send raw image data from one computer to another.

Thanks

[Wim Taymans]

On 05/09/2012 06:40 PM, tantor2012 wrote:

> Hi,
>
> I am trying to use udpsink/udpsrc to send and receive RGB images of size
> 320x240x3.
>
> Sending:
> In the sink I have our own source plugin which
>   - captures image from our camera
>   - places in a buffer of the image size.
>
> I connect the output of this to gst-launch -v srcplugin ! udpsink port=2000

320*240*3 = 230400, this is too big to fit in a udp packet.
> Receiving"
> we have our own sink plugin which is supposed to just get the data. the
> pipeline here is gst-launch udpsrc port=2000 ! sinkplugin ! filesink
> location=test.txt
>
> The receiving part just waits and nothing is written to the file.
>
> Instead of our own plugins i have tried to use appsrc and appsink with the
> same result. Nothing is written to the file.
appsrc/appsink doesn't work with gst-launch. otherwise it will work.
>
> How can we achieve this? The aim is to send raw image data from one computer
> to another.

Try this:

gst-launch videotestsrc ! ffmpegcolorspace ! rtpvrawpay ! udpsink
host=127.0.0.1

and then:

gst-launch udpsrc caps="application/x-rtp, media=(string)video,
clock-rate=(int)90000, encoding-name=(string)RAW, sampling=(string)RGB,
depth=(string)8, width=(string)320, height=(string)240,
colorimetry=(string)SMPTE240M" ! rtpvrawdepay ! ffmpegcolorspace !
autovideosink

Wim

>
> Thanks
>
>
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