Further information: ffmpeg stops after it detects broken frames, with error messages like here: https://superuser.com/questions/1048637/ffmpeg-video-recording-freezes-after-invalid-data-found-when-processing-input
[video4linux2,v4l2 @ 0xed0c353440] Dequeued v4l2 buffer contains 32533 bytes, but 614400 were expected. Flags: 0x00012001. /dev/video0: Invalid data found when processing input Finishing stream 0:0 without any data written to it. ffmpeg behaviour is already in a 2 year old feature request which applies here as well: https://trac.ffmpeg.org/ticket/4795 This confirms that the kernel uvcvideo driver is the source of the problem - it delivers the broken frames to ffmpeg. Kai-Heng Feng <kai.heng.f...@canonical.com> schrieb am So., 13. Aug. 2017 um 17:25 Uhr: > Okay, the error happens in avcodec_send_packet() or > avcodec_receive_frame(). > Needs to find out what ffmpeg did here... > > ** Also affects: ffmpeg (Ubuntu) > Importance: Undecided > Status: New > > -- > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/1708922 > > Title: > uvcvideo module does not work with Dell XPS 12 webcam > > To manage notifications about this bug go to: > > https://bugs.launchpad.net/ubuntu/+source/ffmpeg/+bug/1708922/+subscriptions > ** Bug watch added: FFmpeg Trac bug tracker #4795 https://trac.ffmpeg.org/ticket/4795 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1708922 Title: uvcvideo module does not work with Dell XPS 12 webcam Status in ffmpeg package in Ubuntu: New Status in linux package in Ubuntu: Incomplete 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 ProcEnviron: PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=de_DE.UTF-8 SHELL=/bin/bash RelatedPackageVersions: cheese 3.24.0-0ubuntu1 cheese-common 3.24.0-0ubuntu1 Signal: 8 SourcePackage: linux StacktraceTop: 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.modalias: dmi:bvnDellInc.:bvrA08:bd03/03/2015:svnDellInc.:pnXPS12-9Q33:pvrA08:rvnDellInc.:rnXPS12-9Q33:rvrA08:cvnDellInc.:ct8:cvrNotSpecified: dmi.product.name: XPS 12-9Q33 dmi.product.version: A08 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ffmpeg/+bug/1708922/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
