Getting data from buffer to pass to another function/process outside of Gstreamer

[Nicolas Dufresne]

Le jeudi 18 mai 2017 à 12:45 -0700, dayunbao a écrit :
> Hi all,
> 
> I have a pipeline that basically looks like this:
> 
> v4l2src -> videorate -> jpegenc -> queue -> jifmux -> multifilesink
> 
> I'm capturing a frame once a second from a web cam, and saving is as
> a JPEG. 
> I've also added a probe to the source pad of the JPEG encoder, so
> whenever
> the buffer is pushed downstream I can have a function called to do
> something.  What I'd also like to do is copy the data from the buffer
> /before it is encoded by the JPEG encoder/ so I can pass it off to
> another
> program for some separate image processing.  I think this should be
> relatively easy, and I've read about the identity plug in, and its
> dump
> function, as well as the GSTBuffer's gst_buffer_copy_deep ()
> function, but
> I'm not sure what is the best way to do this.  Does anyone have any
> suggestions?

You could also use tee and appsink:

 v42lsrc ! tee name=t
    t. ! queue ! jpegenc ! ...
    t. ! queue ! appsink

> 
> Thanks!
> 
> 
> 
> --
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> outside-of-Gstreamer-tp4683038.html
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