help to measure bandwidth

[Emile Semmes]

Hi Simo,

You can try attaching a data probe to the udpsrc or tcpclientsrc src pad 
with gst_pad_add_buffer_probe(). In the callback, you can keep track of 
the size of the incoming GstBuffer (GstBuffer->size) which is most 
likely the MTU size and get the timestamp using 
gst_util_get_timestamp(). With that you should be able to determine the 
incoming bandwidth. See 
http://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/chapter-dataaccess.html#section-data-probe 
for an example on how to add a data probe.

Another option is using an identity element and connecting a callback to 
the handoff signal it emits. You can place the identity element anywhere 
in your pipeline to determine the bandwidth between two elements.

You might want to make sure it's synchronous so that your timestamps are 
valid. It should be but double-check with something like wireshark.

Take care,
Emile


-- 
Emile Semmes
Software Consultant
e6 Group, LLC
Office: (630) 376-0626
www.e6group.com
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On 6/2/2012 1:08 PM, simosimo wrote:
> hello,
>
> Im doing some experimental test on GStreamer, and I get to the fourth
> parameter of quality of service: the bandwidth.
> can someone suggest me some techniques to measure the network bandwidth used
> by my streaming pipeline.
> In fact, I do performance measurements, therefore, I try to find the impact
> of using multiple instance on the computer on the network that makes
> transcoding , so I'd like to measure the bandwidth  according to number of
> instance supported by the computer (CPU).
>
> Thank you for your help.
>
>
> Simo
>
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