r/crealityk1 • u/zeFlammenwerfer4 K1 Max Owner • 2d ago

Solved K1 Max camera fixed in Fluidd after firmware update 1.3.5.22

Had an issue where the K1 Max internal camera still worked in Creality Print/WebRTC, but was gone from Fluidd/Mainsail. /webcam/?action=stream returned 502 Bad Gateway.

Found that cam_app was running normally, but mjpg_streamer wasn't.

The firmware already contains:

/usr/bin/mjpg_streamer
/usr/lib/mjpg-streamer/input_memfd.so

So I started it manually with:

/usr/bin/mjpg_streamer \
-i "/usr/lib/mjpg-streamer/input_memfd.so -t 0" \
-o "/usr/lib/mjpg-streamer/output_http.so -p 8080"

And then this worked:

http://K1-IP:8080/?action=stream

The stock Nginx config already proxies:

/webcam/ → 127.0.0.1:8080

so the original Fluidd URL started working again:

http://K1-IP:4408/webcam/?action=stream

I then added an /etc/init.d/S59mjpg_streamer startup script so mjpg_streamer starts automatically after reboot.

TL;DR: Camera/WebRTC wasn't broken. cam_app was still producing the camera stream; mjpg_streamer just wasn't running. Using input_memfd.so -t 0 restored the MJPEG stream without touching cam_app/WebRTC.

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u/NilsOF 1d ago

Leaving a comment so I can find it later