[gstreamer-bugs] [Bug 564437] rtpjpegdepay was unable to handle frame dimensions greater than 2040

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-plugins-good | Ver: HEAD CVS




------- Comment #12 from Luc  2008-12-15 13:44 UTC -------

Lets take a look on the old and OBSOLETE RFC2327 and see whats told in there :

"
Extension Mechanism: Tool writers can define experimental bandwidth
modifiers by prefixing their modifier with "X-". For example:

b=X-YZ:128

SDP parsers should ignore bandwidth fields with unknown modifiers.
Modifiers should be alpha-numeric and, although no length limit is
given, they are recommended to be short.

"

*** in the above paragrah from OBSOLETE RFC2327 they talk about bandwidth
fields with unknown modifiers, not about media or session attributes, 

"
   Attributes that will be commonly used can be registered with IANA
(see Appendix B). Unregistered attributes should begin with "X-" to
prevent inadvertent collision with registered attributes. In either
case, if an attribute is received that is not understood, it should
simply be ignored by the receiver.
"
(...)


*** however the OBSOLETE RFC2327 say above it is ok to use "x-" prefix for
unregistered attributes... but is now obsoleted by RFC4566, which tell now :

"
  Most uses of the "x-" prefix notation for experimental parameters are
   disallowed and the other uses are deprecated.
"
(...)

*** so they say in the paragraph above of RFC4566 that it is disallowed or
deprecated to use "x-" in general ( they do not say anything about the
context), so it would also apply to session and media attributes...


" 
   Use of the "X-" prefix is NOT RECOMMENDED: instead new modifiers
   SHOULD be registered with IANA in the standard namespace.  SDP
   parsers MUST ignore bandwidth fields with unknown modifiers.
   Modifiers MUST be alphanumeric and, although no length limit is
   given, it is recommended that they be short.
"
(...)


*** And the paragraph above from RFC4566 is not talking about session or media
attributes but about modifiers for bandwidth fields...


Hopefully i have much too much hairs (here and now) :D 


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