cvCreateCameraCapture fails to open camera (Bug #491)

Added by Niall O'Hara over 14 years ago. Updated over 12 years ago.

Status:Done Start date:
Priority:High Due date:
Assignee:Vadim Pisarevsky % Done:

0%
Category:highgui-camera
Target version:-
Affected version: Operating System:
Difficulty: HW Platform:
Pull request:

Description

Running bumbleebee2 fireware camera on Windows XP SP3.

VideoCapture cap;

cap.open(0);

if(!cap.isOpened()) {
return -1;
}

In Revision 3354 the above works fine with my camera, since then it just isn't detected.

Related issues

duplicated by Bug #580: cannot get life feed from webcam under Windows Cancelled

Associated revisions

Revision bbac4bc4
Added by Andrey Kamaev about 12 years ago

Merge pull request #491 from Daniil-Osokin:cvtRGB2YUV420p

History

#1
Updated by Niall O'Hara over 14 years ago

the cmake flag, HAVE_VIDEOINPUT does not seem to be defined even when set?

#2
Updated by Niall O'Hara over 14 years ago

  • Status deleted (Open)

#3
Updated by Niall O'Hara over 14 years ago

if I ammend line 103-105 in \modules\highgui\src\precomp.hpp as follows

#if defined WIN32 || defined _WIN32
#define HAVE_VFW 1
#define HAVE_VIDEOINPUT 1

All works again as it should

#4
Updated by Niall O'Hara over 14 years ago

Should also mention

using VS2008

#5
Updated by Andrei Zaharescu over 14 years ago

I just looked at the opencv_highgui defines that got automatically generated in the project file, and HAVE_VIDEOINPUT is not one of them. Therefore, the problem is really in the cmake configure script for the highgui module.

I will try to figure out a fix and post it here.

#6
Updated by Andrei Zaharescu over 14 years ago

It turns out the the proper fix is quite simple:

Modify trunk\opencv\modules\highgui\CMakeLists.txt and add the following lines:

if(WITH_VIDEOINPUT)
add_definitions(-DHAVE_VIDEOINPUT)
endif()

Somebody that can modify the svn tree should add this and close the bug.

#7
Updated by anonymous - over 14 years ago

is this fix in the trunk yet?

#8
Updated by Vadim Pisarevsky almost 14 years ago

looks like the problem has been fixed quite a while ago

  • Status set to Done
  • (deleted custom field) set to fixed

#9
Updated by Andrey Kamaev over 12 years ago

  • Category changed from highgui-images to highgui-camera

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