I don't see how this is a bug in ffmpeg. The feature request linked in
this bug report is asking for a workaround for a buggy kernel driver
which will not fix the underlying issue, and isn't going to fix any
other programs using the webcam anyway.

** Changed in: ffmpeg (Ubuntu)
       Status: Confirmed => Incomplete

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  uvcvideo module does not work with Dell XPS 12 webcam

Status in ffmpeg package in Ubuntu:
Status in linux package in Ubuntu:

Bug description:
  uvcvideo: Found UVC 1.00 device Integrated Webcam (0bda:5716) from
  Dell XPS 12 laptop (9Q33 version) does not work properly for several
  versions of the kernel now.

  guvcview nor cheese both show the issue, so it's the uvcvideo driver.
  Starting at 640x480 and higher resolutions, parts of lower half of
  video flickers / don't show image.

  Error messages:
  V4L2_CORE: (jpeg decoder) error while decoding frame
  V4L2_CORE: (jpeg decoder) Ignoring empty buffer
  V4L2_CORE: Error - Couldn't decode frame

  VLC seems to use another driver AND DOES NOT SHOW issue.

  ProblemType: Crash
  DistroRelease: Ubuntu 17.10
  Package: cheese 3.24.0-0ubuntu1
  ProcVersionSignature: Ubuntu 4.11.0-10.15-generic 4.11.8
  Uname: Linux 4.11.0-10-generic x86_64
  ApportVersion: 2.20.6-0ubuntu4
  Architecture: amd64
  CrashCounter: 1
  CurrentDesktop: GNOME
  Date: Sun Aug  6 12:15:28 2017
  ExecutablePath: /usr/bin/cheese
  InstallationDate: Installed on 2017-04-01 (127 days ago)
  InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Beta amd64 (20170331)
  MachineType: Dell Inc. XPS 12-9Q33
  ProcCmdline: cheese
   PATH=(custom, no user)
   cheese        3.24.0-0ubuntu1
   cheese-common 3.24.0-0ubuntu1
  Signal: 8
  SourcePackage: linux
   cheese_camera_play () from /usr/lib/x86_64-linux-gnu/libcheese.so.8
   ?? ()
   g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
   ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
   g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
  Title: cheese crashed with SIGFPE in cheese_camera_play()
  UpgradeStatus: Upgraded to artful on 2017-06-08 (59 days ago)
  UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
  dmi.bios.date: 03/03/2015
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A08
  dmi.board.name: XPS 12-9Q33
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A08
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: Not Specified
  dmi.product.name: XPS 12-9Q33
  dmi.product.version: A08
  dmi.sys.vendor: Dell Inc.

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