Hello Dan,
2012/5/23 Dan Dennedy <[email protected]>
>
> I hate to be the bearer of bad news, but I think you are going to fail
> unless you are prepared to make substantial changes to the MLT Python
> binding and OpenShot. OpenShot uses the sdl (or sdl_preview) consumer
> with its awkward way of embedding SDL into a GUI toolkit, which does
> not work on OS X. Kdenlive only uses the sdl_audio consumer and then
> listens to a MLT event for when to paint the frame. From the frame
> that the event provides, the app fetches the rgba data and renders it
> with OpenGL in a QGLWidget. The python binding needs enhancement to
> support MLT events invoking a python callable. Then, enhanced to
> subclass an events with a frame object argument. Next, you would need
> to figure out how to integrate that into OpenShot as well as rendering
> with OpenGL into GTK+. P.S. This is the same sort of work I anticipate
> is needed for GTK3 if the reports about SDL embedding being broken are
> true.
>
> I do not plan to help you in this endeavor because I am in the midst
> of making a new Qt-based cross-platform editor named Shotcut where I
> have already cross-platform working well. Besides all of this,
> OpenShot plans to abandon MLT, and I am not particularly keen on the
> way it uses MLT API (or lack thereof) or the way GTK+ looks/works on
> OS X and Windows.
>
>
OK, thanks for the info. I fully understand and support your reasons.
> > So far the introduction.
> >
> > For Openshot I need mlt with python bindings so I took your
> > macports portfile, upgraded it to 0.78 and added a python
> > variant (default is for kedenlive and doesn\'t need python).
> > In the meantime I encountered a weird issue with the
> > framework build (src/framework) as the config.mak contains
> > \"-n\" and gcc/g++ stumbles on that, so I made a very rude fix
>
> Why? Where? I have never encountered that problem, and neither has
> anyone else reported it. Is it due to enabling a swig language?
>
I think the python expansion did this as it doesn't happen with the normal
Portfile that you created.
>
> > to it (the post-configure), which I assume you can do much
> > better.
> > The problem now is that the _mlt.so and accompanying mlt.py
> > get built but doesn\'t seem to get installed.
> > So now I have two questions:
> > - do you want me to file a bug ticket or something alike?
> > - do you have a clue?
> >
> > Below a copied diff or my attempts
>
> OK, thanks...
>
> > ---
> > /opt/local/var/macports/sources/
> rsync.macports.org/release/tarballs/ports/multimedia/mlt/Portfile
> > 2011-12-13 10:30:26.000000000 +0100
> > +++ /Users/harryvanderwolf/Portfile.mlt 2012-05-23
> > 16:24:43.000000000 +0200
> > @@ -5,8 +5,8 @@
> > PortGroup qt4 1.0
> >
> > name mlt
> > -epoch 3
> > -version 0.7.6
> > +#epoch 3
> > +version 0.7.8
>
> I have been holding off upgrading it because the Kdenlive port is very
> sensitive to MLT version, and I have not upgraded the Kdenlive port
> because I could not get dbus to work again after some upgrades and
> even reinstalling. Consequently, I have abandoned supporting and
> maintaining the kdenlive port. KDE apps on macports are a real pain in
> the ass because of their dependence on dbus daemons and kded, which
> not only makes install difficult and tedious for end users but also
> for me to support them. It is not effective use of my time. Also, the
> very tall stack of dependencies and these daemons makes install slow
> and long, and afterwards it is very brittle to upgrade resulting in
> many headaches. It is for these reasons that I also started Shotcut.
>
>
For my reasons to move I started again with kdenlive also on OS X and I
fully agree with you on the kde and dbus stuff. In the last week I already
removed and reinstalled macports three times. Only the second time I
succeeded in installing kdenlive.
Next from not stable kdenlive is dead slow, also with proxies enabled.
> You can see the work-in-progress here:
> http://www.mltframework.org/bin/view/Sandbox/TestLatest
>
> Official preview release not available pending the automated nightly
> windows build. As you may see, at this time it is not an editor, but
> mainly just a media player. It is all foundational work at this point.
>
>
Yes, I downloaded it. The Ubuntu 11.10 version also plays fine on 12.04.
Well, I'm interested with what you will deliver..
> > categories multimedia
> > maintainers dennedy.org:dan
> > description Open source multimedia framework - core
> > libraries
> > @@ -23,8 +23,8 @@
> > master_sites sourceforge:project/mlt/mlt
> > platforms darwin
> >
> > -checksums sha1
> > f23c8bddb9b1f406c3cfcd155e74f8d9d37b5120 \\
> > - rmd160
> > 898256dfbbda158f51796a7d4468a6a54b9b246d
> > +checksums sha1
> > 2d55b16918284ffadd5eae6eed1c5f0a12669d32 \\
> > + rmd160
> > 8edaeba84ca91b002c85e8582b7b0fa8d0286a86
> >
> > # frei0r-plugins is not universal
> > universal_variant no
> > @@ -40,7 +40,7 @@
> > port:libsamplerate \\
> > path:lib/pkgconfig/sdl.pc:libsdl \\
> > port:libvorbis \\
> > - port:sox
> > + port:sox
> >
> > if {${configure.compiler} == \"clang\"} {
> > configure.compiler llvm-gcc-4.2
> > @@ -52,6 +52,9 @@
> > --disable-jackrack \\
> > --disable-mmx
> >
> > +post-configure { reinplace \"s|-n||\"
> > ${worksrcpath}/src/framework/config.mak
> > +}
> > +
>
> Unable to reproduce. Pending further explanation.
>
I also think this is due to the python variant.
>
> > platform darwin 10 {
> > if { ${build_arch} == \"x86_64\" } {
> > configure.args-delete --disable-mmx
> > @@ -66,11 +69,19 @@
> > build.env-append CFLAGS=\"${configure.cflags}\"
> > LDFLAGS=\"${configure.ldflags}\"
> > build.args-append CC=\"${configure.cc}\"
> > CXX=\"${configure.cxx}\" CPP=\"${configure.cpp}\"
> >
> > +
> > variant no_x11 {
> > configure.args-append --disable-gtk2
> > depends_lib-delete port:gtk2
> > }
> >
> > +variant python {
> > + configure.args-append --swig-languages=python
> > + depends_lib-append port:python27 \\
> > + port:swig-python \\
> > + port:swig
> > +}
> > +
>
> That looks fine.
>
>
Maybe it looks fine but it doesn't install the _mlt.so and mlt.py. When
using the "port build mlt" I can see in the work folder that they are
created.
I will not take it further from here also based on your arguments. I'm
leaving OSX anyway.
Thanks for your answer.
Harry
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