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mkuf / prind

print in docker - Deploy a containerized Klipper Stack for your 3D Printer
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TIMELAPSE not working due to local webcam url not being accessable inside moonraker container (probably) #113

Closed raphaeleduardo42 closed 6 months ago

raphaeleduardo42 commented 6 months ago

I've been trying to make timelapse to work for a couple of days. Gathering more information, I'd maybe found why but my lack of knowledge stop me trying to fix it.

The first error message I recieved was, when trying to render:

2024-02-22 18:29:11,012 [timelapse.py:render()] - Rendering Video failed: /usr/bin/ffmpeg -r 5 -i '/tmp/timelapse/frame%6d.jpg' -threads 2 -g 5 -crf 23 -vcodec libx264 -pix_fmt yuv420p -an  '/tmp/timelapse/timelapse__20240222_1829.mp4' -y : Output file #0 does not contain any stream

Going trough, it showed me that the TIMELAPSE_TAKE_FRAME gcode lead to this erro at the logs:

2024-02-22 18:29:07,009 [timelapse.py:newframe()] - getting newframe failed: wget http://localhost/webcam?action=snapshot -O /tmp/timelapse/frame000001.jpg

The error could be replicated when trying to get frame inside the container:

$ docker exec -it prind-moonraker-1 wget http://localhost/webcam?action=snapshot -O /tmp/timelapse/frame000001.jpg
--2024-02-22 18:37:04--  http://localhost/webcam?action=snapshot
Resolving localhost (localhost)... 127.0.0.1, ::1
Connecting to localhost (localhost)|127.0.0.1|:80... failed: Connection refused.
Connecting to localhost (localhost)|::1|:80... failed: Cannot assign requested address.
Retrying.

--2024-02-22 18:37:05--  (try: 2)  http://localhost/webcam?action=snapshot
Connecting to localhost (localhost)|127.0.0.1|:80... failed: Connection refused.
Connecting to localhost (localhost)|::1|:80... failed: Cannot assign requested address.
Retrying.

--2024-02-22 18:37:07--  (try: 3)  http://localhost/webcam?action=snapshot
Connecting to localhost (localhost)|127.0.0.1|:80... failed: Connection refused.
Connecting to localhost (localhost)|::1|:80... failed: Cannot assign requested address.
Retrying.

Even though the webcam is working, and accessable outside the container. When trying to access using the machine IP it worked flawless, so maybe this is related on how the containers are interacting with themselves.

$ docker exec -it prind-moonraker-1 wget http://192.168.0.156/webcam?action=snapshot -O /tmp/timelapse/frame000001.jpg
--2024-02-22 18:41:39--  http://192.168.0.156/webcam?action=snapshot
Connecting to 192.168.0.156:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 35136 (34K) [image/jpeg]
Saving to: ‘/tmp/timelapse/frame000001.jpg’

/tmp/timelapse/frame000001.jp 100%[=================================================>]  34.31K  --.-KB/s    in 0.005s

2024-02-22 18:41:39 (6.18 MB/s) - ‘/tmp/timelapse/frame000001.jpg’ saved [35136/35136]

When trying to acess the webcam inside the moonraker container trough curl it does work. Also using http://webcam:8080/snapshot as snapshot url from webcam on mainsail make work the TIMELAPSE_TAKE_FRAME but also vanish the stream.

mkuf commented 6 months ago

Hi there,

Containers in the stack can reach each other by their name, so you'll have to set the snapshot url in moonraker.conf to http://webcam:8080/snapshot.
The webcam URLs in mainsail do not need to be changed.

-Markus

raphaeleduardo42 commented 6 months ago

Just worked @mkuf really thx