Crowsnest / No signal > cant start capturing: input/output error | Mainsail | Page 1

quartz zenith Apr 12, 2023, 1:24 PM

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I have a multi-camera crowsnest setup on a laptop that works fine for 2 out of 3 devices. I just get a 'no signal' with a working fps counter.

Config:

[cam 3]
mode: mjpg # mjpg/rtsp
port: 8082 # Port
device: /dev/video4 # See Log for available ...
resolution: 1920x1080 # widthxheight format
max_fps: 25 # If Hardware Supports this it will be forced, otherwise ignored/coerced.

The log mentions it can find all 3 cams, and gives me both a /dev/video address as a /dev/v4l/by-id..... address. AFter that, i get the following logs where the error block repeats:

[04/12/23 15:13:23] crowsnest: DEBUG: ustreamer [cam 3]: -- INFO [276200.981 stream] -- Device fd=8 opened
[04/12/23 15:13:23] crowsnest: DEBUG: ustreamer [cam 3]: -- INFO [276200.981 stream] -- Using input channel: 0
[04/12/23 15:13:23] crowsnest: DEBUG: ustreamer [cam 3]: -- INFO [276200.982 stream] -- Using resolution: 1920x1080
[04/12/23 15:13:23] crowsnest: DEBUG: ustreamer [cam 3]: -- INFO [276200.982 stream] -- Using format: MJPEG
[04/12/23 15:13:23] crowsnest: DEBUG: ustreamer [cam 3]: -- INFO [276200.983 stream] -- Using HW FPS: 25
[04/12/23 15:13:23] crowsnest: DEBUG: ustreamer [cam 3]: -- ERROR [276200.983 stream] -- Device doesn't support setting of HW encoding quality parameters
[04/12/23 15:13:23] crowsnest: DEBUG: ustreamer [cam 3]: -- INFO [276200.983 stream] -- Using IO method: MMAP
[04/12/23 15:13:23] crowsnest: DEBUG: ustreamer [cam 3]: -- INFO [276200.987 stream] -- Requested 5 device buffers, got 5
[04/12/23 15:13:23] crowsnest: DEBUG: ustreamer [cam 3]: -- ERROR [276200.988 stream] -- Can't start capturing: Input/output error
[04/12/23 15:13:23] crowsnest: DEBUG: ustreamer [cam 3]: -- INFO [276200.990 stream] -- Device fd=8 closed
[04/12/23 15:13:23] crowsnest: DEBUG: ustreamer [cam 3]: -- INFO [276200.990 stream] -- Sleeping 1 seconds before new stream init ...

📎 message.txt 📎 message.txt 📎 message.txt 📎 message.txt

stable oxide Apr 12, 2023, 1:26 PM

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Are those 4 times the same logs?

quartz zenith Apr 12, 2023, 1:26 PM

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yep, i seem to be an idiot

stable oxide Apr 12, 2023, 1:26 PM

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And please send the whole log

quartz zenith Apr 12, 2023, 1:27 PM

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here is the whole log

📎 crowsnest_15.log

stable oxide Apr 12, 2023, 1:28 PM

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So what exactly is your problem atm? That this one cam isn't working or that 2 out of 3 cams aren't working?

quartz zenith Apr 12, 2023, 1:28 PM

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1 out of 3 is not working

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in the current log i disabled the two others, and disconnected one other

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so the one enabled is the one failing

stable oxide Apr 12, 2023, 1:29 PM

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Ok, got it

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Can you send the output of v4l2-ctl --list-devices

quartz zenith Apr 12, 2023, 1:32 PM

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stable oxide Apr 12, 2023, 1:37 PM

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That's what I thought. Please use the full device patch instead of /dev/video. /dev/video can change on reboots and sometimes crowsnest reports the wrong index somehow

quartz zenith Apr 12, 2023, 1:40 PM

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so the '/dev/v4l/by-id/usb-YGTek_Webcam_YG_U700_D.2021.0104.1403-video-index0' thingy?

stable oxide Apr 12, 2023, 1:40 PM

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yes

quartz zenith Apr 12, 2023, 1:40 PM

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okay, i'll give that a shot

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No luck, logs included

📎 crowsnest_16.log

stable oxide Apr 12, 2023, 2:01 PM

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I googled now and it's just saying the same thing as I already thought. Might be a driver issue

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Maybe you can find online some driver for this cam.

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Only thing you could try is to change to the other video device. Maybe this manufacturer is doing something weird.
This would be /dev/v4l/by-id/usb-YGTek_Webcam_YG_U700_D.2021.0104.1403-video-index1 or /dev/video3 according to your last log

quartz zenith Apr 12, 2023, 2:06 PM

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i'll try changing it first

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does it help if i mention that it worked out of the box on a raspberry pi with raspbian, and not on ubuntu22?

stable oxide Apr 12, 2023, 2:07 PM

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Ok, that's weird

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https://linux-hardware.org/?id=usb:1d6d-0105

A database of all the hardware that works under linux

quartz zenith Apr 12, 2023, 2:07 PM

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clarification, not on my laptop running ubuntu22

stable oxide Apr 12, 2023, 2:08 PM

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Try to find the driver on that website and install them on your laptop

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If this is the right one ofc

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nvm

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I just googled something and then posted it without thinking

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Is this the builed in laptop cam?

quartz zenith Apr 12, 2023, 2:09 PM

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😅

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nope, it's a free usb cam

stable oxide Apr 12, 2023, 2:10 PM

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Sry

quartz zenith Apr 12, 2023, 2:10 PM

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https://www.amazon.nl/gp/product/B08P5KYJ19/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Webcam met microfoon, 2K HD-streamingwebcam met privacyafdekking en...

Webcam met microfoon, 2K HD-streamingwebcam met privacyafdekking en statief USB Plug and Play voor pc Laptop voor videobellen Opnemen Vergaderen Ondersteunt gaming (FMS Webcam Nine)

stable oxide Apr 12, 2023, 2:10 PM

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I'm dumb right now xD

quartz zenith Apr 12, 2023, 2:10 PM

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Haha 😆

stable oxide Apr 12, 2023, 2:15 PM

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@exotic steeple you maybe have some idea on this? For short: ERROR [276200.988 stream] -- Can't start capturing: Input/output error on a basic usb webcam that was working on a raspi first but not on an Ubuntu 22.04.02 LTS Laptop

exotic steeple Apr 12, 2023, 2:23 PM

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Didnt finish the test yet, but could be possible ubuntu uses a special group to access cameras as a normal user

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Kernel wise it should be nearly the same

quartz zenith Apr 12, 2023, 2:24 PM

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2 other camera's do work, is that helpful?

exotic steeple Apr 12, 2023, 2:25 PM

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Okayy.... Thats wierd 🤔

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But luck for you, I will try to replicate, I own the same cam too 😉

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Please be patient

quartz zenith Apr 12, 2023, 2:25 PM

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lmao that's cool

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no worries :)

exotic steeple Apr 12, 2023, 2:27 PM

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Do you use the server variant or a desktop?

quartz zenith Apr 12, 2023, 2:29 PM

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how do you mean?

stable oxide Apr 12, 2023, 2:30 PM

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Are you using Ubuntu with a desktop environment or only headless server version?

quartz zenith Apr 12, 2023, 2:36 PM

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ah, with a desktop env

exotic steeple Apr 12, 2023, 2:54 PM

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Which one?

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Want to use the exact same to see differences

quartz zenith Apr 12, 2023, 2:55 PM

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is there a command to get specific info like that?

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i just downloaded ubuntu 2204 lts

exotic steeple Apr 12, 2023, 2:56 PM

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Ok, then it should be the default GNOME edition... So nothing like KDE or XFCE right?

quartz zenith Apr 12, 2023, 2:57 PM

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nope, nothing like that

exotic steeple Apr 12, 2023, 5:53 PM

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So... Cant replicate, but please share output of ls -l /dev/video*

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Could be an permission problem

quartz zenith Apr 12, 2023, 6:24 PM

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exotic steeple Apr 12, 2023, 6:24 PM

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groups

quartz zenith Apr 12, 2023, 6:25 PM

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groups?

exotic steeple Apr 12, 2023, 6:25 PM

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command groups need output

quartz zenith Apr 12, 2023, 6:26 PM

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exotic steeple Apr 12, 2023, 6:26 PM

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sudo usermod -aG video pi reboot after

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Oh stop

quartz zenith Apr 12, 2023, 6:27 PM

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that was just in time xD

exotic steeple Apr 12, 2023, 6:27 PM

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missed you are in group video

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Thats wierd. I'll try another pc with ubuntu, maybe it shows up there on my lenovo thinkpad I couldnt replicate

quartz zenith Apr 14, 2023, 12:19 PM

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hey guys, update: turned out my usb hub wasn't playing fair

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the one that was already working seems fine with the hub, the one that didn't work hates the usb hub

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without the hub it works fine

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i'll try a new hub later on

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different hub has the same issues

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interesting

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printer via hub instead of direct does seem to work, so i can put the webcam in directly

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so i have a working workaround

#Crowsnest / No signal > cant start capturing: input/output error