[Insight-developers] Video and OpenCV issues

[Bill Lorensen]

Eventually, you will see that cvCaptureFromFile is failing in  CanReadFile

BTW, why is the openCV C interface being used rather than the C++interface?

On Thu, Nov 3, 2011 at 2:48 PM, Bill Lorensen <bill.lorensen at gmail.com>wrote:

> I pulled down the patch and still get these errors:
>
>     Start 1: OpenCVVideoCaptureTest
> 1/4 Test #1: OpenCVVideoCaptureTest ...........***Exception: SegFault
> 1.44 sec
>     Start 2: OpenCVImageBridgeTest
> 2/4 Test #2: OpenCVImageBridgeTest ............   Passed    0.95 sec
>     Start 3: OpenCVVideoIOTest
> 3/4 Test #3: OpenCVVideoIOTest ................***Failed    0.25 sec
>     Start 4: OpenCVVideoIOFactoryTest
> 4/4 Test #4: OpenCVVideoIOFactoryTest .........***Failed    0.26 sec
>
> The code is not checking for failure here. It shopuld throw an exception.
> Of course this will not fix the problem.
>
> 247    ::InitializeVideoIO()
> 248    {
> 249      m_VideoIO = itk::VideoIOFactory::CreateVideoIO(
> 250                                    itk::VideoIOFactory::ReadFileMode,
> 251                                    m_FileName.c_str());
> 252      m_VideoIO->SetFileName(m_FileName.c_str());
> 253      m_VideoIO->ReadImageInformation();
> 254
>
>
> On Thu, Nov 3, 2011 at 2:15 PM, Luis Ibanez <luis.ibanez at kitware.com>wrote:
>
>> Bill,
>>
>> We made some progress with Xiaoxiao,
>> and push a patch 4:
>>
>> Where the ITK_VIDEO_USE_*
>> variables were part of the problem,
>>
>> http://review.source.kitware.com/#patch,sidebyside,2997,4,Modules/Video/IO/src/itkVideoIOFactory.cxx
>>
>> but,...
>> still need to do further debugging.
>>
>> We think that we are getting closer
>> to the final source of the problem.
>>
>>
>>     Luis
>>
>>
>> -----------------------------------------------
>> On Thu, Nov 3, 2011 at 1:27 PM, Bill Lorensen <bill.lorensen at gmail.com>
>> wrote:
>> > I built my OpenCV with FFMPEG support. I assume you'll find the same
>> problem
>> > when I ran gdb.
>> >
>> > Quoted from my gerrit review:
>> >
>> > OpenCVVideoIO::CanReadFile, cvCaptureFromFile fails.VideoFileReader
>> should
>> > check for failure here:
>> > m_VideoIO = itk::VideoIOFactory::CreateVideoIO(
>> > itk::VideoIOFactory::ReadFileMode,
>> > m_FileName.c_str());
>> > m_VideoIO->SetFileName(m_FileName.c_str());
>> > m_VideoIO->ReadImageInformation();
>> >
>> > On Thu, Nov 3, 2011 at 1:12 PM, Luis Ibanez <luis.ibanez at kitware.com>
>> wrote:
>> >>
>> >> Bill,
>> >>
>> >> I just managed to replicate the segmentation fault in:
>> >>
>> >>              OpenCVVideoCaptureTest
>> >>
>> >>
>> >> ... now firing up GDB...    :-)
>> >>
>> >>
>> >> I would suspect that this is related to not having build
>> >> some FFMPEG support in OpenCV, but, I will probably
>> >> be wrong and will end up having to buy you a beer...
>> >>
>> >>
>> >>     Luis
>> >>
>> >>
>> >> ------------------------------------------------------------
>> >> On Fri, Oct 28, 2011 at 11:42 AM, Bill Lorensen <
>> bill.lorensen at gmail.com>
>> >> wrote:
>> >> > Luis and Pat,
>> >> >
>> >> > I am building openvc 2.3.1 with WITH_FFMPEG:BOOL=ON.
>> >> >
>> >> > This is against this gerrit topic:
>> >> > http://review.source.kitware.com/#change,2997
>> >> >
>> >> > itkOpenCVVideoCaptureTest segfaults.
>> >> >
>> >> > Bill
>> >> >
>> >
>> >
>> >
>> > --
>> > Unpaid intern in BillsBasement at noware dot com
>> >
>> >
>>
>
>
>
> --
> Unpaid intern in BillsBasement at noware dot com
>
>


-- 
Unpaid intern in BillsBasement at noware dot com
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