[Paraview] compiling ffmpeg for paraview on mac os x

[Berk Geveci]

This is a known issue that, unfortunately, we can't fix. Some drivers
have buggy implementations and we can't get around that. It will be a
FAQ/wiki entry once we clean up the ParaView wiki. Having said that,
ParaView should not use offscreen rendering on OS X. Please report a
bug about that here http://paraview.org/Bug.

-berk


On Mon, Apr 28, 2008 at 2:32 AM, Michael Wild <themiwi at gmail.com> wrote:
> Found the problem! It wasn't with ffmpeg, but the offscreen rendering. I
> remembered reading a post to this list about someone getting black
> screenshots, so I figured I'd give it a try: and voilà, it worked!
>
>  I couldn't find a bug-report related to this in mantis, but am not sure I
> used the correct search terms. Is this a known issue or should I create a
> new entry?
>
>
>  Michael
>
>
>  On 26Apr, 2008, at 18:06, Berk Geveci wrote:
>
>
>
> > Here if what I used to build ffmpeg:
> >
> > FFmpeg version SVN-r6375, Copyright (c) 2000-2004 Fabrice Bellard
> >  configuration:  --enable-shared --disable-mmx --disable-vhook
> >  libavutil version: 49.0.1
> >  libavcodec version: 51.16.0
> >  libavformat version: 50.5.0
> >  built on Mar 30 2007 14:01:41, gcc: 4.0.1 (Apple Computer, Inc. build
> 5367)
> >
> > -berk
> >
> > On Sat, Apr 26, 2008 at 10:40 AM, Michael Wild <themiwi at gmail.com> wrote:
> >
> > > Hi all
> > >
> > >
> > > I tried to get ffmpeg to compile the way as described in
> > > http://www.vtk.org/files/support/ffmpeg_source.tar.gz for use in
> ParaView
> > > 3.3.0 CVS. But the instructions are quite stale and the included source
> does
> > > not compile on intel macs. So I pulled the current HEAD from ffmpeg
> > > subversion repository, but found it to be in a state which doesn't
> compile.
> > > I then extracted the tar.gz provided by fink (versioned
> ffmpeg-0.4.20071217)
> > > which compiles cleanly. However, there seems to be a change in the API
> which
> > > required me to remove the & in the expression
> > > url_fclose(&this->avFormatContext->pb) of the file
> > > VTK/IO/vtkFFMPEGWriter.cxx.
> > >
> > > Things compiled now, but whenever I try to export a movie, ffmpeg
> reports
> > > on the command line that "[msmpeg4 @ 0x581c810]bitrate tolerance too
> small
> > > for bitrate" and ParaView tells me that "vtkFFMPEGWriter (0x1ce649b0):
> Error
> > > initializing video stream."
> > >
> > > Ok, but in binary distribution of ParaView-3.2.1 things work, so I tried
> to
> > > figure out which version of ffmpeg has been used for the creation of
> that
> > > particular binary. I figured out that the ffmpeg revision used must be
> in
> > > the range 6350-6639, because otherwise the library versions don't match.
> But
> > > which of these 290 revisions? I tried some, namely 6350 and 6639, but
> both
> > > do not compile properly. For the latter I had to hack the configure
> script
> > > to create a valid config.mak and the common.mak I had to change in order
> to
> > > prevent the thing trying to link libavutil against itself (quite
> > > idiotic...). Finally things failed when the assembler choked on
> > > non-relocatable assembly code in libavcodec/cabac.h. Configuring ffmpeg
> to
> > > create static libraries however worked. But then linking libvtkIO
> requires
> > > the "-read_only_relocs suppress" flag to be set (which I'm not quite
> sure
> > > about what it does)...
> > >
> > > At that point compiling succeeded, and I could even create an avi movie.
> > > However, the output is just black.
> > >
> > > I hope that someone from the developer team can shed some light on how
> to
> > > get ffmepg working with paraview on Mac OS X.
> > >
> > > Michael
> > > _______________________________________________
> > > ParaView mailing list
> > > ParaView at paraview.org
> > > http://www.paraview.org/mailman/listinfo/paraview
> > >
> > >
> >
>
>