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Re: [Linphone-developers] Problem with large video packets

From: Simon Morlat
Subject: Re: [Linphone-developers] Problem with large video packets
Date: Mon, 7 Nov 2005 17:18:44 +0100
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Thanks a lot for the analysis of the problem.
I'm also pleased to know that video support could work on your systems.


Le Jeudi 3 Novembre 2005 12:48, Uwe Zipf a écrit :
> Hello,
> while experimenting with the video feature of linphone1.1.0
> i get errors in the displayed image if the source is an
> arm system (running linphonec with SDL usage removed). There
> are many errors from the libavcodec about incorrect frame headers
> and illegal vlc codes.
> It works well between two PCs.
> The only difference to a stream originating from the x86 systems
> is the size of the RTP packets. It seems that the coding on the
> arm is less efficient.
> The source of the problem is the definition of MAX_RTP_SIZE to
> 5000 in the videostream.c. It is used to set the buffersize for
> the incoming packets. If these get to big, the UDP packets are
> cut off if bigger and the frame gets damaged.
> I think the receiveable size should be the same as the sendable.
> There is a definition for UDP_MAX_SIZE 65536 in rtp.h of the
> oRTP library.
> Best regards,
> Uwe Zipf
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