Hi Ross,
x-dimensions header is required to work with resolutions > 2048. I saw
some devices which relied on it for megapixel streaming (IIRC they just
sent lower bits in standard JPEG over RTP header) and liveMedia handled
this correctly if the header present.
Regards,
Yuri
On 04.06.2012 19:54, Ross Finlayson wrote:
After the RTSP connection IP-based cameras to send a reply with the
line "a=x-dimensions:640,480", but when you connect to LIVE555 Proxy
Server, this line is missing. For some decoders need to know the width
and height, and this is a problem.
A camera should not depend upon its server including an
"a=x-dimensions..." SDP line, because this attribute is optional (and
not even a standard). All decoders should be able to infer the video
width and height from the encoded input stream, or from other
"a=fmtp:..." configuration parameters (which *are* standards).
However, in the spirit of "be liberal in what you accept", I agree
that the "LIVE555 Proxy Server" should pass on this attribute if it
sees it. So, a fix for this will be included in a future release of
the software. (Be warned, however, that requests like this by
hobbyists are considered low priority.)
Ross Finlayson
Live Networks, Inc.
http://www.live555.com/
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