Gstreamer-1.0 - get data from GstSample in GstAppSink

[Sérgio Agostinho]

Hey,

A sample has a buffer
https://developer.gnome.org/gstreamer/stable/gstreamer-GstSample.html#gst-sample-get-buffer

A buffer has memory, which you map to get access to the raw data.
https://developer.gnome.org/gstreamer/stable/gstreamer-GstBuffer.html#gst-buffer-map

The MapInfo structure then should has the pointer to the data you can use
https://developer.gnome.org/gstreamer/stable/gstreamer-GstMemory.html#GstMapInfo

Cheers


2016-02-14 12:36 GMT+01:00 Christoph Kuhr <christoph.kuhr at web.de>:

> Hi *,
>
> I posted on stack overflow before, but I realized, this might be the
> better channel for this question.
>
> I am trying to get data from a GstSample to process it in my app sink. But
> I cannot find a way to extract the data from a sample. I have set the
> callball function "new-sample":
>
> static void GStPipeline::new_sample (GstAppSink *sink, CustomData *data) {
>     GstSample* sample;
>
>     sample = gst_app_sink_pull_sample(data->app_sink);
>
>     if (sample) {
>         data->sampleBuffer[data->num_samples] =  sample;
>
>         data->num_samples++;
>
>         gst_sample_unref(sample);
>     }
>
>     gst_sample_unref(sample);}
>
>
> Am I missing some basic concept? Is it true, that since gstreamer-1.0 I
> have to provide a callback "new-sample" instead of "pull-buffer" ? For my
> understanding, a buffer contains the samples?
>
> BR,
> Ck
>
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