[vtk-developers] build errors with recent changes on FindFFMPEG.cmake

[Dave Partyka]

The idea of my changes should have FFMPEG_INCLUDE_DIR set to /usr/include so
that include<ffmpeg/avcodec.h> inside of vtkFFMPEGWriter works. Which
corresponds to the "old style". The new style (if you download ffmpeg from
svn and do a make install) places each libs header in a separate directory,
such as libavcodec/avcodec.h.

On Thu, Mar 25, 2010 at 11:41 AM, Arnaud GELAS <arnaud_gelas at hms.harvard.edu
> wrote:

>  During the configuration time, I get:
>
> Checking if FFMPEG uses old style header files - yes
>
> Checking if FFMPEG has img_convert - not found
>
> Checking if FFMPEG uses old API for url_fclose - not found
>
> Checking if FFMPEG has avformat_alloc_context - not found Isn't it supposed
> to be the opposite?
>
>
> In vtkTestFFMPEG.cmake, I have added line 2:
> MESSAGE( STATUS "FFMPEG_INCLUDE_DIR: ${FFMPEG_INCLUDE_DIR}" )
> and I get FFMPEG_INCLUDE_DIR: /usr/include and then since
> /usr/include/ffmpeg exists it enters in the old configuration statement.
>
>
> What is supposed to be FFMPEG_INCLUDE_DIR in my configuration?
> /usr/include/ffmpeg/ ?
>
>
> Arnaud
>
> On 03/25/2010 10:52 AM, Dave Partyka wrote:
>
> can you do a make VERBOSE=1 and send me the compile line for
> vtkFFMPEGWriter.cxx. I am currious if it has a -I/usr/include/ffmpeg or
> -I/usr/include. Thank you very much for helping me debug this.
>
> On Thu, Mar 25, 2010 at 10:48 AM, Arnaud GELAS <
> arnaud_gelas at hms.harvard.edu> wrote:
>
>> Hi Dave,
>>
>> I have just updated and tried again, same errors:
>> [ 75%] Building CXX object IO/CMakeFiles/vtkIO.dir/vtkFFMPEGWriter.cxx.o
>> /home/ajg23/CVSROOT/VTK/IO/vtkFFMPEGWriter.cxx:25:30: error:
>> ffmpeg/avformat.h: No such file or directory
>> /home/ajg23/CVSROOT/VTK/IO/vtkFFMPEGWriter.cxx:32:30: error:
>> ffmpeg/swscale.h: No such file or directory
>> /home/ajg23/CVSROOT/VTK/IO/vtkFFMPEGWriter.cxx:57: error: ISO C++ forbids
>> declaration of ‘AVFormatContext’ with no type
>>
>>
>> ffmpeg headers are installed as follows:
>>
>> /usr/include/ffmpeg/libavcodec/avcodec.h
>> /usr/include/ffmpeg/libavformat/avformat.h
>> /usr/include/ffmpeg/libavutil/avutil.h
>> /usr/include/ffmpeg/libswscale/swscale.h
>>
>> They seem seem to be found during the cmake configuration time, which is
>> supposed to be for recent version of ffmpeg (It may be a wrong assumption
>> here).
>> The error sounds like it assume my system has an older version of
>> ffmpeg...
>>
>> Arnaud
>>
>>
>>
>> On 03/25/2010 10:35 AM, Dave Partyka wrote:
>>
>> Hi Arnaud,
>>
>>  The intention of my change was to get it working with where apt-get
>> installs the headers/libraries on Debian. :-/ Can you share where the ffmpeg
>> headers and libraries are installed on your machine, particularly avcodec,h
>> avformat.h avutil.h swscale.h (this one may not exist at all) and the
>> equivalent libs (libavcodec, libavformat, libavutil, libswscale? Also if you
>> try updating and doing a build right now does the error go away? I checked
>> in a few more changes this morning.
>>
>> On Thu, Mar 25, 2010 at 10:24 AM, Arnaud GELAS <
>> arnaud_gelas at hms.harvard.edu> wrote:
>>
>>> Hi,
>>>
>>> With the recent changes in FindFFMPEG.cmake, vtk is not compiling anymore
>>> with FFMPEG on my machine. It was perfectly working until last night...
>>>
>>> http://www.cdash.org/CDash/viewBuildError.php?buildid=570714
>>>
>>> I can set up a nightly build to track/solve this error if needed.
>>>
>>> My machine is a Linux Fedora Core 12 (64 bits) with ffmpeg installed
>>> using yum.
>>>
>>> The commit message on FindFFMPEG.cmake states "COMP: further fixes to get
>>> FFMPEG to be found properly on Linux."
>>> Is there any distribution dependency on how ffmpeg is installed?
>>>
>>> Arnaud
>>>
>>>
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>>
>>
>
>
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