constant framerate

[Demeyer Jonathan]

Hello,

I'm trying to test a pipeline (test performance of an element) and for this I want to have a constant image flow.
I've try the videorate element like this :
gst-launch -v filesrc location="Pictures/image.jpg" ! jpegdec ! imagefreeze ! videorate ! "video/x-raw-yuv,framerate=1/1" ! fakesink

But logs tells me that images come when the system is ready instead of each second (but timestamps are OK). Actually I see no difference between using videorate or not.
Do I need to use another element or is it a flag that i've missing ?

Thanks in advance,

Jonathan DEMEYER

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