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[Bug 1373221] Re: guvcview crashed with SIGSEGV in get_ctrl_by_id()

 

> please upgrade to version 2.0.1, you can use one of the following ppa:
> stable: https://launchpad.net/~pj-assis/+archive/ubuntu/ppa

This helped!
Thank you very much!

But... with this version 2.0.1, when video size became 2 GB, guvcview
hung up... :-(

# guvcview 
V4L2_CORE: (UVCIOC_CTRL_MAP) Error: No such file or directory
** (guvcview:15514): WARNING **: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-Grv3g4WwxK: Connection refused
V4L2_CORE: VIDIOC_S_EXT_CTRLS for multiple controls failed (error -1)
V4L2_CORE: using VIDIOC_S_CTRL for user class controls
V4L2_CORE: control(0x0098091a) "White Balance Temperature" failed to set (error -1)
V4L2_CORE: VIDIOC_S_EXT_CTRLS for multiple controls failed (error -1)
V4L2_CORE: using VIDIOC_S_EXT_CTRLS on single controls for class: 0x009a0000
V4L2_CORE: control(0x009a0902) "Exposure (Absolute)" failed to set (error -1)
GUVCVIEW: error setting spin value
(guvcview:15514): GLib-GObject-CRITICAL **: g_value_set_object: assertion 'G_VALUE_HOLDS_OBJECT (value)' failed
GUVCVIEW: (status) saving video to /media/ntfs2/guvc/guvc-video-1.mkv
ENCODER: add stream 0 to stream list
ENCODER: add stream 1 to stream list
ENCODER: (matroska) add seekhead entry 0 (max 10)
ENCODER: (matroska) add seekhead entry 1 (max 10)
AUDIO: Pulseaudio pa_stream_get_latency() failed
[...]
ENCODER: (matroska) packet buffer [81] is in use: flushing cached data
ENCODER: video ring buffer full - dropping frame
AUDIO: write buffer(23) is still in use - dropping data

What can be the reason?

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https://bugs.launchpad.net/bugs/1373221

Title:
  guvcview crashed with SIGSEGV in get_ctrl_by_id()

Status in GTK uvc viewer:
  Confirmed
Status in One Hundred Papercuts:
  Triaged
Status in libv4l v4l-utils:
  Confirmed
Status in guvcview package in Ubuntu:
  Triaged
Status in v4l-utils package in Ubuntu:
  Triaged

Bug description:
  HOW TO REPRODUCE:
  - Launch guvcview

  EXPECTED BEHAVIOUR:
  - The application to start normally.

  REAL BEHAVIOUR:
  - The application crashes.

  ProblemType: Crash
  DistroRelease: Ubuntu 14.10
  Package: guvcview 1.7.3-1.1build2
  ProcVersionSignature: Ubuntu 3.16.0-17.23-generic 3.16.3
  Uname: Linux 3.16.0-17-generic x86_64
  ApportVersion: 2.14.7-0ubuntu2
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Wed Sep 24 06:35:20 2014
  ExecutablePath: /usr/bin/guvcview
  InstallationDate: Installed on 2013-05-21 (490 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
  ProcCmdline: guvcview
  SegvAnalysis:
   Segfault happened at: 0x42d970:	mov    0x0,%eax
   PC (0x0042d970) ok
   source "0x0" (0x00000000) not located in a known VMA region (needed readable region)!
   destination "%eax" ok
  SegvReason: reading NULL VMA
  Signal: 11
  SourcePackage: guvcview
  StacktraceTop:
   ?? ()
   ?? ()
   ?? ()
   ?? ()
   __libc_start_main (main=0x409920, argc=1, argv=0x7fff32c34208, init=<optimised out>, fini=<optimised out>, rtld_fini=<optimised out>, stack_end=0x7fff32c341f8) at libc-start.c:287
  Title: guvcview crashed with SIGSEGV in __libc_start_main()
  UpgradeStatus: Upgraded to utopic on 2014-09-24 (0 days ago)
  UserGroups: adm lpadmin sambashare sudo

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