[FFmpeg-devel] (no subject)

[Jun Li]

An issue was found when I test 'RTSP tunnel HTTP' (protocol defined 
by Apple, but no RFC found) on Bosch and Axix IP cameras.

The issue is caused when RTP/RTSP tunnelling in HTTP, post-data is empty 
when sending http header(because data for tunnel is not ready yet), thus
 our http implementation will send "EXPECT: 100-continue" in the header. 

However this header is not widely used by web server, even less for RTSP 
servers. Neither Bosch and Axis cameras support that. Meanwhile, when I 
go through the Apple spec, it does not have any 100-continue header at
all. 

I am not sure this is a regression after introducing 100-continue or
not. But based on my testing on IP cameras, it always fail when tunneling 
RTSP into HTTP with credentials.