[Bug 789842] replace the delimiter for "x-dimensions" or other caps in rtpjpegpay

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=789842

Tim-Philipp Müller <t.i.m at zen.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO
                 CC|                            |t.i.m at zen.co.uk

--- Comment #1 from Tim-Philipp Müller <t.i.m at zen.co.uk> ---
This seems more like a bug in parse_launch or insufficient escaping *somewhere*
:) Not sure what your chances are to get this fixed, realistically.

I can serialize + deserialize caps again just fine:

  caps = gst_caps_new_simple ("foo", "x-dim", G_TYPE_STRING, "640, 480", NULL);
  to_str = gst_caps_to_string (caps);
  GST_ERROR ("string: %s", to_str);
  caps2 = gst_caps_from_string (to_str);
  GST_ERROR ("caps2:  %" GST_PTR_FORMAT, caps2);

which will print this:

  foo, x-dim=(string)"640\,\ 480"


The delimiter is probably not something we made up but from some spec (although
I can't find it right now, but other apps/libs use a comma too here), so I
don't think we can change it just to work around string escaping issues :)

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