Re: [Bug 1708922] Re: uvcvideo module does not work with Dell XPS 12 webcam

Ok, I will do that. Reinhard Tartler schrieb am Do., 12. Apr. 2018, 23:29: > If you can, please file a separate bug for uvcvideo with a stacktrace. Then > please link those bugs > > The easiest way is probably by using apport on the crash file, I guess. > > On Thu, Apr 12,

Re: [Bug 1708922] Re: uvcvideo module does not work with Dell XPS 12 webcam

If you can, please file a separate bug for uvcvideo with a stacktrace. Then please link those bugs The easiest way is probably by using apport on the crash file, I guess. On Thu, Apr 12, 2018, 17:21 emk2203 <1708...@bugs.launchpad.net> wrote: > Original reporter here. I am willing to assist

Re: [Bug 1708922] Re: uvcvideo module does not work with Dell XPS 12 webcam

Original reporter here. I am willing to assist wherever I can, but I reported chiefly because I cannot debug or investigate of my own. Regarding the cheese issue, the exact same issue arises when just using uvcvideo, so it is definitely something passed on from the driver. 2018-04-12 15:52

[Bug 1708922] Re: uvcvideo module does not work with Dell XPS 12 webcam

Looking at the stacktrace, this is coming from /usr/bin/cheese. Even with bad input from the driver (which seems like a valid issue to investigate and improve) - an error message is preferable to a SIGFPE as seen in the initial report. ** Also affects: linux via

[Bug 1708922] Re: uvcvideo module does not work with Dell XPS 12 webcam

Unfortunately I don't have the machine, so this requires the bug reporters to find out. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1708922 Title: uvcvideo module does not work with Dell XPS 12

[Bug 1708922] Re: uvcvideo module does not work with Dell XPS 12 webcam

No idea. Maybe vlc has some hacks to workaround buggy drivers? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1708922 Title: uvcvideo module does not work with Dell XPS 12 webcam To manage

[Bug 1708922] Re: uvcvideo module does not work with Dell XPS 12 webcam

I am not familiar in this area, but why does VLC work but not other Apps? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1708922 Title: uvcvideo module does not work with Dell XPS 12 webcam To

[Bug 1708922] Re: uvcvideo module does not work with Dell XPS 12 webcam

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:

[Bug 1708922] Re: uvcvideo module does not work with Dell XPS 12 webcam

Status changed to 'Confirmed' because the bug affects multiple users. ** Changed in: ffmpeg (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1708922 Title:

[Bug 1708922] Re: uvcvideo module does not work with Dell XPS 12 webcam

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

Re: [Bug 1708922] Re: uvcvideo module does not work with Dell XPS 12 webcam

Here is my output from ffmpeg -f alsa -i default -f v4l2 -s 640x480 -i /dev/video0 -acodec flac -vcodec libx264 output.mkv ffmpeg version 3.3.3-1ubuntu1 Copyright (c) 2000-2017 the FFmpeg developers built with gcc 6.4.0 (Ubuntu 6.4.0-2ubuntu1) 20170724 configuration: --prefix=/usr

[Bug 1708922] Re: uvcvideo module does not work with Dell XPS 12 webcam

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 a member of Ubuntu Bugs, which is subscribed

[Bug 1708922] Re: uvcvideo module does not work with Dell XPS 12 webcam

So which kernel module does VLC use? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1708922 Title: uvcvideo module does not work with Dell XPS 12 webcam To manage notifications about this bug go

Re: [Bug 1708922] Re: uvcvideo module does not work with Dell XPS 12 webcam

I researched the issue some time ago. My webcam and several others like HP are affected by a faulty driver for this webcam, which should be the kernel uvcvideo module. This is the reason why it happens in several progs, like guvcview and cheese. vlc does it's own thing and does not rely on the

[Bug 1708922] Re: uvcvideo module does not work with Dell XPS 12 webcam

Nothing suspicious. Why do you think it's a kernel bug? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1708922 Title: uvcvideo module does not work with Dell XPS 12 webcam To manage notifications

Re: [Bug 1708922] Re: uvcvideo module does not work with Dell XPS 12 webcam

Here it is: 2017-08-11 8:19 GMT+02:00 Kai-Heng Feng : > Can you attach dmesg? > > ** Information type changed from Private to Public > > -- > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/1708922

[Bug 1708922] Re: uvcvideo module does not work with Dell XPS 12 webcam

Can you attach dmesg? ** Information type changed from Private to Public -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1708922 Title: uvcvideo module does not work with Dell XPS 12 webcam To