[Bug 53074] New: Subsequent webcam frames fail with "error dequeuing buf: Broken pipe"

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=53074

Bug ID: 53074
           Summary: Subsequent webcam frames fail with "error dequeuing
                    buf: Broken pipe"
           Product: Wine
           Version: 7.7
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: quartz
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 72492
  --> https://bugs.winehq.org/attachment.cgi?id=72492
strace logs for relevent subprocess

When using VSee and opening the Settings -> Video page, the first frame is read
from the webcam and displayed. Then the following is logged to the console & no
subsequent frames are shown: "libv4l2: error dequeuing buf: Broken pipe"

I've attached the relevant strace & console logs.

Download link: https://vsee.com/vsee_em_nd.exe. Unfortunately this software
requires making an account.

[Bug 53074] Subsequent webcam frames fail with "error dequeuing buf: Broken pipe"

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=53074

--- Comment #1 from Flaviu Tamas  ---
Created attachment 72493
  --> https://bugs.winehq.org/attachment.cgi?id=72493
console logs

[Bug 53074] Subsequent webcam frames fail with "error dequeuing buf: Broken pipe"

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=53074

Ken Sharp  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|                            |https://vsee.com/vsee_em_nd
                   |                            |.exe
          Component|quartz                      |-unknown

[Bug 53074] VSee fails to read more than one frame of video: "libv4l2: error dequeuing buf: Broken pipe"

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=53074

Zeb Figura  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Subsequent webcam frames    |VSee fails to read more
                   |fail with "error dequeuing  |than one frame of video:
                   |buf: Broken pipe"           |"libv4l2: error dequeuing
                   |                            |buf: Broken pipe"
                 CC|                            |[e-mail]
           Keywords|                            |download
          Component|-unknown                    |quartz

--- Comment #2 from Zeb Figura  ---
What camera are you using, and what kernel version? Is there anything
interesting in dmesg?

[Bug 53074] VSee fails to read more than one frame of video: "libv4l2: error dequeuing buf: Broken pipe"

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=53074

--- Comment #3 from Flaviu Tamas  ---
Linux 5.17.5-arch1-1 x86_64

Nothing interesting in dmesg when the error occurs.

This was tested using a "UVC 1.00 device Logitech Webcam C925e (046d:085b)". I
also have a cheap webcam, "UVC 1.00 device DEPSTECH webcam (0c45:636b)", which
exhibits the same behavior.

I also just tested both these webcams using cheese & firefox (one webcam and
one client at a time) and all combinations work fine there.