Get frames from rtsp video stream

[Michael Gruner]

Yes, you need to link against an additional library to use AppSink/AppSrc stuff. If your app is Makefile based the easiest way to do this is by using pkg-config. Something like:

LIBS+=`pkg-config --libs gstreamer-app-1.0`

—
Michael Gruner <michael.gruner at ridgerun.com <mailto:michael.gruner at ridgerun.com>>
Embedded Linux and GStreamer solutions
RidgeRun Engineering
Contact Us - http://www.ridgerun.com/#!contact/c3vn <http://www.ridgerun.com/#!contact/c3vn>

> On Apr 4, 2018, at 06:26, bsonbudak <bsonbudak at gmail.com> wrote:
> 
> Hi,
> 
> I am trying to integrate the code sample into my project; but I get an error
> about appsink:
> 
> GstAppSink *appsink = GST_APP_SINK(*NULL*); do not get any link errors but 
> GstAppSink *appsink = GST_APP_SINK(*sink*);  does
> 
> 
> error: undefined reference to `gst_app_sink_get_type'
> 
> 
> Do i need to link any other libraries other than gstreamer?
> 
> Can you help me with this issue?
> 
> My system:
> Ubuntu 16.04
> Qt Creator 5.9.1
> gstplugins-good , glstreamer packages installed
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> akash jain wrote
>> Use appsink element to receive the frame and save it in .jpg format using
>> opencv:
>> 
>> For eg.
>> 
>> GstElement *pipeline = gst_parse_launch ("rtspsrc location=rtsp://address
>> !
>> YOUR CODEC ! appsink name=sink", &error);
>> 
>> GstElement *sink = gst_bin_get_by_name (GST_BIN (pipeline), "sink");
>> 
>> GstAppSink *appsink = GST_APP_SINK(sink);
>> 
>> GstSample *sample = gst_app_sink_pull_sample(appsink);
>> 
>> GstBuffer *buffer = gst_sample_get_buffer(sample);
>> 
>> GstMapInfo map;
>> 
>> gst_buffer_map (buffer, &map, GST_MAP_READ);
>> 
>> Mat frame(Size(320, 240), CV_8UC3, (char*)map.data, Mat::AUTO_STEP);  if
>> its a 320x240 size image
>> 
>> imwrite("XYZ.jpg",frame);
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> On Thu, May 26, 2016 at 3:19 PM, Alexander Soloviev <
> 
>> alexolut@
> 
>> >
>> wrote:
>> 
>>> Hi all.
>>> 
>>> I'm new to gstreamer. Maybe my question is quite easy or stupid.
>>> 
>>> I would like to know the easiest way how to get frames from rtsp video
>>> stream to, for example, store them to files as jpeg/png/bmp etc.
>>> 
>>> I need to use it from C/C++ code.
>>> 
>>> Thanks in advance.
>>> 
>>> _______________________________________________
>>> gstreamer-devel mailing list
>>> 
> 
>> gstreamer-devel at .freedesktop
> 
>>> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel <https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel>
>>> 
>>> 
>> 
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> 
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> 
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> 
> 
> 
> 
> 
> --
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