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I have Two cameras, one is microsoft and another one is logitech.

For both cameras i have used the below pipeline.

 gst-launch-1.0 -v v4l2src device=/dev/video1 ! videoconvert ! video/x-raw,format=I420,width=640,height=480 ! fpsdisplaysink

For Microsoft :

/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 678, dropped: 10, current: 30.10, average: 29.71

/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 678, dropped: 10, current: 30.10, average: 29.71

/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 678, dropped: 10, current: 30.10, average: 29.71

But, when i moved my hand very close to the camera, or i closed the camera with my hand then the results are,

/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 2554, dropped: 44, current: 7.52, average: 28.93

/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0/GstTextOverlay:fps-display-text-overlay: text = rendered: 2558, dropped: 44, current: 7.51, average: 28.81

/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 2558, dropped: 44, current: 7.51, average: 28.81

There is a Huge Drop in Frame Rate. What is the problem in this scenario and how to resolve it??

For Logitech:

Same pipeline i had used, but the results are as follows,

/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 0, dropped: 79, fps: 0.00, drop rate: 24.07

/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 0, dropped: 79, fps: 0.00, drop rate: 24.07

/GstPipeline:pipeline0/GstFPSDisplaySink:fpsdisplaysink0: last-message = rendered: 0, dropped: 79, fps: 0.00, drop rate: 24.07

I am totally confused, What is the problem with these two scenario's??

  • I just found [this](http://gstreamer-devel.966125.n4.nabble.com/Performance-penalty-for-GStreamer-1-0-compared-to-0-10-td4664327.html) .. there is mentioned ORC.. do you have gstreamer compiled with ORC support? (ORC support enabled after compilation). What HW, OS do you use on that "Logitech"? – nayana Apr 15 '16 at 07:51

0 Answers0