how to get the video resolution from pipeline

[zhi]

Hi guys,

I am newbin to gstreamer, and want to know how to get the video resolution (width,height) from pipeline as below:

GstElement *pipeline = gst_parse_launch("rtspsrc name=src latency=0 ! decodebin name=dec ! appsink name=sink", &error);

when receiving the video data from appsink (new-sample), i need to know the resolution of video go ahead!

I have tried to research the signal of decodebin, and don't know how to do.

thanks in advance

-zhi

 

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[Florian Zwoch]

In your sample callback try something like this:

gint width;
gint height;

GstSample* sample = gst_app_sink_pull_sample (appsink);
GstBuffer* buffer = gst_sample_get_buffer (sample);
GstCaps* caps = gst_sample_get_caps (sample);
GstStructure* structure = gst_caps_get_structure (caps, 0);

gst_structure_get_int (structure, "width", &width);
gst_structure_get_int (structure, "height", &height);

g_print ("video size is %dx%d\n", width, height);

gst_sample_unref (sample);

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[brizio]

Hi there!

I am not an expert, but I had the same problem and maybe this can be of some help to you. Look here:

http://gstreamer-devel.966125.n4.nabble.com/Detecting-video-stream-resolution-in-appsink-with-GStreamer-1-0-tt4685967.html

Hope that helps!

regards

Fabrizio

On Tue, Feb 6, 2018 at 1:23 PM, zhi <[hidden email]> wrote:

Hi guys,

I am newbin to gstreamer, and want to know how to get the video resolution (width,height) from pipeline as below:

GstElement *pipeline = gst_parse_launch("rtspsrc name=src latency=0 ! decodebin name=dec ! appsink name=sink", &error);

when receiving the video data from appsink (new-sample), i need to know the resolution of video go ahead!

I have tried to research the signal of decodebin, and don't know how to do.

thanks in advance

-zhi

 

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gstreamer-devel mailing list
[hidden email]
https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel

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