[SOLVED] Raspberry PI 4 64 Bit OS Raspbian Bullseye or Bookworm, Coral USB accelerator, classify_capture.py

[zoldaten]

Description

i got it working just want to share.

Click to expand!

Issue Type

Others

Operating System

Linux

Coral Device

USB Accelerator

Other Devices

Rapsberry Pi 4

Programming Language

Python 3.9

Relevant Log Output

1. usb coral need python 3.9. it doesnt support 3.11 which is native for Raspbian Bookworm.
one way - install python 3.9 with pyenv.
2. install coral packages inside python 3.9
see https://github.com/google-coral/pycoral/issues/140

Download pycoral-2.0.0-cp39-cp39-linux_aarch64.whl and tflite_runtime-2.5.0.post1-cp39-cp39-linux_aarch64.whl from https://github.com/google-coral/pycoral/releases/tag/v2.0.0
pip install ./pycoral-2.0.0-cp39-cp39-linux_aarch64.whl
pip install ./tflite_runtime-2.5.0.post1-cp39-cp39-linux_aarch64.whl

3. picamera2 will not work cause of lack libcamera. so the fast way - use gstreamer and build libcamera.
https://wiki.veye.cc/index.php/V4L2_mode_for_Raspberry_Pi#Source_code_cross_compilation - gstreamer
https://libcamera.org/getting-started.html

4. install mediamtx or other rtsp-server.
https://github.com/bluenviron/mediamtx?tab=readme-ov-file#standalone-binary  - just download binary for raspberry. and change it settings (this video shows how).

5.
start rtsp stream:
gst-launch-1.0 libcamerasrc !  "video/x-raw, format=(string)UYVY, width=(int)640, height=(int)480,framerate=30/1" ! videoscale ! videoconvert ! x264enc tune=zerolatency bitrate=500 speed-preset=superfast ! rtspclientsink location=rtsp://localhost:8554/mystream

start mediamtx:
./mediamtx

start classify from coral examples (python 3.9):
python classify.py

video - https://youtu.be/EA7_2qL3Iho

[zoldaten]

also see with picamera2 - https://github.com/zoldaten/google_coral_usb_picamera2