[vtkusers] compiling VTK with FFMPEG support on MacOSX 10.6

[Alexandre GOUAILLARD]

hi nicolas,

heard the weather is getting better in the boston area, enjoy.

"
adding bz2 to the list of libraries in /IO/CMakeLists.txt did the job.
"

I just did that locally.

It so happen that mac is more strict about library dependencies (and
getting more and more so), which is not a bad thing.

I guess in most platform, and on previous macosX it was ok to let
whoever find out the lib dependencies, but not anymore, so the bz2 lib
should be added explicitly. It is also my understanding that adding a
library does not hurt when/if you eventually do not need it.

I just do not want to test / commit it myself :-)

alex.



On Thu, Mar 18, 2010 at 4:36 AM, Nicolas Rannou
<nicolas_rannou at hms.harvard.edu> wrote:
> Hi Alex,
>
> which version of FFMPEG do you use?
> I had this error but I can't reproduce it...
>
> You can try to configure FFMPEG without matroska...
> I also noticed that configuring/building FFMPEG with shared libraries can
> solve some compilation errors and it seems that vtkFFMPEGWriter is working
> properly at runtime.
>
> Moreover, for some reason the test for the FFMPEG writer in VTK, IOCxxTests
> #4 doesn't always succeed (floating point exception, depending on  machine
> used), even if I can use the vtkFFMPEGWriter properly in my project...
>
>   Nicolas
>
> Alexandre GOUAILLARD wrote:
>>
>> hi all,
>>
>> I compiled FFMPEG with default configuration.
>> WHen trying to compile VTK with USE_FFMPEG flag ON, it did not find
>> some symbols.
>> Undefined symbols:
>>  "_BZ2_bzDecompressEnd", referenced from:
>>      _matroska_decode_buffer in libavformat.a(matroskadec.o)
>>  "_BZ2_bzDecompress", referenced from:
>>      _matroska_decode_buffer in libavformat.a(matroskadec.o)
>>  "_BZ2_bzDecompressInit", referenced from:
>>      _matroska_decode_buffer in libavformat.a(matroskadec.o)
>>
>> adding bz2 to the list of libraries in /IO/CMakeLists.txt did the job.
>>
>> Maybe there is something cleaner ( APPLE flags, checking if bz2
>> exists, ...) to do to make it work out of the box?
>>
>>
>> #-----------------------------------------------------------------------------
>> # FFMPEG
>> # If the ffmpeg library is available, compile vtkFFMPEGWriter.
>> IF (VTK_USE_FFMPEG_ENCODER)
>>  INCLUDE(${VTK_CMAKE_DIR}/vtkTestFFMPEG.cmake)
>>
>>  CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/vtkFFMPEGConfig.h.in
>>                 ${CMAKE_CURRENT_BINARY_DIR}/vtkFFMPEGConfig.h @ONLY)
>>  INCLUDE_DIRECTORIES(${VTK_BINARY_DIR}/IO)
>>  INSTALL(FILES vtkFFMPEGConfig.h
>>    DESTINATION ${VTK_INSTALL_INCLUDE_DIR_CM24}
>>    COMPONENT Development)
>>
>>  INCLUDE_DIRECTORIES(${FFMPEG_INCLUDE_DIR})
>>  SET(Kit_SRCS ${Kit_SRCS} vtkFFMPEGWriter.cxx)
>>  SET(KIT_LIBS ${KIT_LIBS}
>>    ${FFMPEG_avformat_LIBRARY}
>>    ${FFMPEG_avcodec_LIBRARY}
>>    ${FFMPEG_avutil_LIBRARY}
>>    bz2)        ####### <<=== ######### MODIFIED ##################
>>  IF (NOT VTK_FFMPEG_HAS_IMG_CONVERT)
>>    SET(KIT_LIBS ${KIT_LIBS}
>>      ${FFMPEG_swscale_LIBRARY})
>>  ENDIF (NOT VTK_FFMPEG_HAS_IMG_CONVERT)
>> ENDIF (VTK_USE_FFMPEG_ENCODER)
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>