[MEncoder-users] Variable frame rate from rtsp source

[walter]

Hi all,

i'm trying to acquire an rtsp video stream from an axis-210 ip camera. I'm 
using the following command line (mencoder recompiled from svn, 20 of may 2008):

mencoder rtsp://192.168.0.210/mpeg4/media.amp -ovc copy -o test.avi

Everything works fine, and the frame rate is guessed correctly. The problem 
occurs when the frame rate of the stream is changed from the camera's web 
interface (say from 12 to 13, or from 6 to 12 fps). In this case, mencoder exit 
immediately and quietly, with no error or log report. The recorded video is ok 
up to the point where the frame rate changed. I've tried to play with the -fps 
option, without any luck.

Do you know if there is any command line option to overcome this problem, and/
or any pointers to relevant part of the source code?

As an aside, i've notice that ffmpeg does not suffer of the above problem, and 
the resulting video is correctly played by Mplayer with the variable frame 
rate. I assume that is because ffmpeg uses its own rtsp implementation, instead 
of live555.

Thanks in advance

walter