V4L2 FPGA - GStreamer Pipelines - Filter
V4L2 FPGA |
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GStreamer Pipelines |
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Camera Pipeline
4k
WIDTH=", width=(int)3840" HEIGHT=", height=(int)2160" gst-launch-1.0 v4l2src device=/dev/video1 ! "video/x-raw $WIDTH $HEIGHT" ! perf ! fakesink sync=false -v & gst-launch-1.0 videotestsrc is-live=true ! "video/x-raw $WIDTH $HEIGHT" ! v4l2sink sync=false device=/dev/video2 -v
1080p
WIDTH=", width=(int)1920" HEIGHT=", height=(int)1080" gst-launch-1.0 v4l2src device=/dev/video1 ! "video/x-raw $WIDTH $HEIGHT" ! perf ! fakesink sync=false -v & gst-launch-1.0 videotestsrc is-live=true ! "video/x-raw $WIDTH $HEIGHT" ! v4l2sink sync=false device=/dev/video2 -v
Performance Summary
Resolution | CPU usage (%) | Memory (MB) | Memory Bandwidth Usage (%) |
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4k@7 | 2.13 | 60 | 1 |
1080p@30 | 3.75 | 25 | 1 |
720p@30 | 2.53 | 15 | 1 |
Resolution | Maximum framerate (fps) |
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4k | 7.478 |
1080p | 29.485 |
720p | 64.972 |
Resolution | CPU usage (%) | Memory (MB) | Memory Bandwidth Usage (%) |
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4k@30 | 2.625 | 60 | 4 |
1080p@30 | 2.93 | 25 | 1 |
720p@30 | 2.34 | 15 | 1 |
Resolution | Maximum framerate (fps) |
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4k | 38.90 |
1080p | 144.5 |
720p | 294.729 |
<b>Note:</b> Convolution accelerator is still under development. The current frame rate is limited due to the PCI-e 2.0, where the PicoEVB only uses one communication lane.
CPU Usage
These measurements were taken with the tegrastats app to see the behavior of the pipeline while running at 30fps.
Memory Usage
These measurements were taken with tegrastats app to see the behavior of the pipeline while running at 30fps.
Maximum Framerate
These measurements were taken with gstperf tool to see the behavior of the pipeline while running, with videotestsrc we are able to push buffers as much as possible to the element. The image below shows the maximum framerate that the debayer element supports. It depends on the execution time of the debayer kernel algorithm.
Memory Usage
These measurements were taken with tegrastats file to see the behavior of the pipeline while running at 30fps.