ximagesrc at 144 fps

[Xiaojiba]

Hello,
I have been looking all around for one week now but no one seems to be
needing a ximagesrc at more than 30 fps... I saw one at 60fps but it's all
fine until 60 so, it was not related to my problem.

I have a pipeline to capture my screen to a file : 

``
gst-launch-1.0 -e ximagesrc ! \
	"video/x-raw, framerate=144/1" ! \
	jpegenc quality=5 ! avimux ! \
	filesink location=file.avi
``

This compiles, but when I open the .avi with for example VLC,
I have a framerate of 144, BUT it takes 60 frames of the first second, 60 of
the second one and 24 if the third one

Easier with 120 fps : It takes 2s at 60 fps to have one full second on VLC
I believe ximagesrc is capped at 60 frame per second, am I correct ? Or my
pipeline is wrong ? 

Thanks for help, 



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