Low frame rate of Ricoh Theta S on Raspberry Pi2

[7675t]

• On Laptop PC (Thinkpad X1), I can use usb_cam package to acquire the image from Ricoh Theta S
• The frame rate is 15 fps, which is equal to the specification
• However, on Raspberry Pi2, the frame rate drops about 5 fps
• The CPU load reach 100 %, consumed by usb_cam_node
• We have to find the way to improve this, hopefully 15 fps
  • Following command seems to measure the capability of the camera

    $  v4l2-ctl --stream-mmap=3 --stream-count=300

• Result is 15 fps, which may mean the hardware has the capability to acquire the image in 15 fps

[7675t]

This blog post explains a lot.

raspberrry pi と USBカメラ で30fps出すのは難しかったという話