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

[Arnaud GELAS]

It seems that changing in FindFFMPEG.cmake
get_filename_component(FFMPEG_INCLUDE_DIR ${FFMPEG_INCLUDE_DIR} PATH)

by
get_filename_component(FFMPEG_INCLUDE_DIR ${FFMPEG_INCLUDE_DIR} ABSOLUTE)

make it work on my configuration and on an ubuntu installation. I mean 
it detects that it is a new version (and that should normally compile 
afterwards).

Can you confirm that it works on your machine?

On 03/25/2010 11:50 AM, Dave Partyka wrote:
> 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 <mailto: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
>>     <mailto: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
>>>         <mailto: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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