Re: v4l2loopback webcam not detected

[Daniel Pocock]

Some further feedback, this appears to depend on the order in which OBS
and Jami are started

If I start OBS and click "Start Virtual Camera" before starting the
jami-gnome process then Jami can detect the virtual webcam and use it in
a video call.

Most users probably want to leave Jami running all the time and don't
want to restart it each time they (re)start OBS.


On 01/02/2021 12:11, Daniel Pocock wrote:
> 
> 
> I have a v4l2loopback setup from OBS Studio.  It works fine with
> guvcview and Firefox (WebRTC)
> 
> Jami says "No camera detected"
> 
> Jami version 20210104.4.dda80df~ds1-1
> 
> 
> $ v4l2-ctl -d /dev/video2 --all
> 
> Driver Info:
>         Driver name      : v4l2 loopback
>         Card type        : Dummy video device (0x0000)
>         Bus info         : platform:v4l2loopback-000
>         Driver version   : 4.19.132
>         Capabilities     : 0x85208001
>                 Video Capture
>                 Video Memory-to-Memory
>                 Read/Write
>                 Streaming
>                 Extended Pix Format
>                 Device Capabilities
>         Device Caps      : 0x85208001
>                 Video Capture
>                 Video Memory-to-Memory
>                 Read/Write
>                 Streaming
>                 Extended Pix Format
>                 Device Capabilities
> Priority: 0
> Video input : 0 (loopback: ok)
> Format Video Capture:
>         Width/Height      : 1280/720
>         Pixel Format      : 'YUYV' (YUYV 4:2:2)
>         Field             : None
>         Bytes per Line    : 2560
>         Size Image        : 1843200
>         Colorspace        : sRGB
>         Transfer Function : Default (maps to sRGB)
>         YCbCr/HSV Encoding: Default (maps to ITU-R 601)
>         Quantization      : Default (maps to Limited Range)
>         Flags             :
> Format Video Output:
>         Width/Height      : 1280/720
>         Pixel Format      : 'YUYV' (YUYV 4:2:2)
>         Field             : None
>         Bytes per Line    : 2560
>         Size Image        : 1843200
>         Colorspace        : sRGB
>         Transfer Function : Default (maps to sRGB)
>         YCbCr/HSV Encoding: Default (maps to ITU-R 601)
>         Quantization      : Default (maps to Limited Range)
>         Flags             :
> Streaming Parameters Video Capture:
>         Frames per second: 25.000 (25/1)
>         Read buffers     : 8
> Streaming Parameters Video Output:
>         Frames per second: 25.000 (25/1)
>         Write buffers    : 8
> 
> User Controls
> 
>                     keep_format 0x0098f900 (bool)   : default=0 value=0
>               sustain_framerate 0x0098f901 (bool)   : default=0 value=0
>                         timeout 0x0098f902 (int)    : min=0 max=100000
> step=1 default=0 value=0
>                timeout_image_io 0x0098f903 (bool)   : default=0 value=0
>