not-negotiated error with rtspsrc and omxh264dec

[geoffm]

I'm trying to create a pipeline that will take periodic snapshots from an
rtsp stream (ip camera) using the h264 decoder hardware in the Raspberry Pi. 

>From this pipeline:


I get this error:


Based on my research it looks like videorate can't handle a framerate=0/1?
Which I think means it's a variable frame rate?

I'm confused as to why this is happening because I can use this pipeline to
display the video feed on the Raspberry Pi desktop:


I can use this pipeline to capture .jpg snapshots form the rtsp stream using
the main processor (but it uses 106% of the cpu)


I'm also wondering if there is a way to get the omxh264dec plugin to output
a downsampled frame rate and/or resolution? Or does that have to be done in
the general processor?



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