How to use GstVideoAffineTransformationMeta in gstglimagesink

[Sebastian Dröge]

On So, 2016-05-15 at 16:57 -0700, Grégoire Gentil wrote:
> Hello,
> 
> I'm interested to use GstVideoAffineTransformationMeta in 
> gstglimagesink, especially in gst_glimage_sink_on_draw:
> 
> https://cgit.freedesktop.org/gstreamer/gst-plugins-bad/tree/ext/gl/gstglimagesink.c#n2028
> 
> I have a pad probe installed in my pipeline in which I do:
> 
> static GstPadProbeReturn cb_have_data(GstPad *pad, GstPadProbeInfo 
> *info, CustomData *data) {
> 
> GstBuffer *buffer = gst_pad_probe_info_get_buffer (info);
> 
> GstVideoAffineTransformationMeta *meta = 
> gst_buffer_add_video_affine_transformation_meta (buffer);

Do you get warnings about the buffer not being writable? You should do
something like

  info->data = gst_mini_object_make_writable (info->data);

and then get the buffer.

Apart from that what you're doing there should work.

-- 
Sebastian Dröge, Centricular Ltd · http://www.centricular.com
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