Qtox: [regression] Linux: No Picture From Webcam In AV Settings / Video Call

[ElLamparto]

Brief Description

OS: Linux , Debian Jessie 32 bit
qTox version v1.4.0-339-ge6e666f-obs

Reproducible: Always

Steps to reproduce

1. Start qTox
2. Go to AV Settings
3. The video parameters are correct, but no picture. No video in a video call.

Full log attached:
qToxNoVideo.txt

[14:45:58.461] src/video/camerasource.cpp:219 : Debug: Opening device "/dev/video0"
[video4linux2,v4l2 @ 0xc9b4d20] No such input format: .
[14:45:58.500] src/video/camerasource.cpp:233 : Warning: Failed to open device!

Additional Info

Not long ago it worked correctly.

[ghost]

Works as usual for me.

qTox a556762c54de5f4acbcf2f37c84cd7bb7b3b1afa
Debian testing
Linux 4.6.0-1-amd64

[ElLamparto]

I have this:

[ghost]

I have the same issue on version 1.4.0-339-ge6e666f-obs

v4l2-ctl --list-formats-ext

ioctl: VIDIOC_ENUM_FMT
Index: 0
Type: Video Capture
Pixel format: 'YUYV'
Name: YUV 4:2:2 (YUYV)
    Size: Discrete 640x480
        Interval: Discrete 0.033s (30.000 fps)
        Interval: Discrete 0.067s (15.000 fps)
    Size: Discrete 320x240
        Interval: Discrete 0.033s (30.000 fps)
        Interval: Discrete 0.067s (15.000 fps)
    Size: Discrete 160x120
        Interval: Discrete 0.033s (30.000 fps)
        Interval: Discrete 0.067s (15.000 fps)

[antis81]

As a workaround, switch the video device and you will see the preview.

[agilob]

I'm sure I didn't PR somewhere to fix it and it was rejected... I was something like 'click on preview to activate, second click to disable'. Wrote it to prevent camera starting automatically when going to settings.

[ProMcTagonist]

@agilob It should just work without workarounds.

[agilob]

But... but... I made the PR to fix this issue!

[ElLamparto]

@antis81, your workaround does not work in my case - still no picture (but thanks :). utox and toxic both get the video correctly.

[ghost]

Tested at commit 59352ae797be37a1d51821df4d06ef07e9b870bb and indeed the same problem remains.

[wiz21b]

I confirm I have the same issue on Debian 8, stable, 32 bits. qTox version v1.5.2-175-g9dfdd4e-obs (according to About Box). I got my build from the opensuse repo.

WebCam is properly recognized by qTox, it even works fine as a microphone. But no video shows up. I see the same error as the other post in this thread :+1:

[19:50:48.166 UTC] video/camerasource.cpp:269 : Debug: Opening device  "/dev/video0"
[video4linux2,v4l2 @ 0xb624c00] No such input format: .
[19:50:48.167 UTC] video/camerasource.cpp:283 : Warning: Failed to open device!

For a test, I ran qv4l2 (Video4Linux qt test bench) and it runs fine. Gnome cheese works fine too.
I also tested (a bit) utox 0.10.1 and it sees the webcam and is able to display the preview.

Ultra dirty work around : I run qv42l to have a window showing my web cam, then in qTox, I use the "desktop" as a video device. Dirty, but works.

[ElLamparto]

@wiz21b, while waiting for a fix, you can use µTox (it is compatible with qTox, uses the same config and AV works perfectly).

[TheOuterLinux]

My web cam doesn't show up in the list at all for me, but I'm running a custom made distro from SuseStudio on an old Macbook, so who knows (iSight nonsense); I can get Desktop mirroring to work though. My distro is 32-bit OpenSUSE 13.2 based. If you can get the webcam to work with a screen recorder and then use that with JACK for audio, it may be a crude but temporary fix for now.

Could you edit ~/.config/tox/qtox.ini video section some how?

[sudden6]

Does this problem still occur with a recent version of qTox?

[ghost]

Not sure but I'm compiling the latest version and will try out the video.

[ghost]

Tested on the latest commit on Debian 9 and it looks like video is working.

[sudden6]

I'll close this then.