[gst-devel] Problem with gst-python in windows

Sébastien Moutte sebastien at moutte.net
Thu May 17 01:04:58 CEST 2007


I'm not sure where your crash is coming from but it seems it started 
when you have installed ffmpeg libraries.
You should remove DLL from http://neuron2.net/dgavcdec/dgavcdec100a3.zip 
and install gst-ffmpeg setup which includes dependencies.
Next you should be able to play a lot of different formats.

I updated CVS build and put it online there 
I'll create a Windows dedicated page on GStreamer page ASAP to link on 
these binaries and to add some help.


NeBlackCat (lists) a écrit :
> Hi Jodim,
> I can't help with your problem, but could you list exactly what you did 
> to get to the point of successfully running gstplayer?
> I tried to do that and ended up with all sorts of problems. For a while 
> I could run gstplayer but couldn't get it to do anything, now any gst 
> related thing that I run (including gstplayer) just crashes. Perhaps 
> anyone else with experience of gst on Windows can chime in too, it would 
> be appreciated.
> Here's what I did, starting from scratch (following Sebastien Moutte's 
> instructions at the bottom of http://perso.orange.es/moutte983/gstreamer/) :
> 1) Installed GTK+ runtime environment v. 2.10.6-1 (and The GIMP 2.2.14 
> to test it) from:      
> http://internap.dl.sourceforge.net/sourceforge/gimp-win/gtk%2B-2.10.6-1-setup.zip
> Installed into default location: <progs>\Common\GTK\2.0\
> 2)  Installed  GStreamer core binaries v. 0.10 (from CVS on 2007-03-12) 
> from:
> http://perso.orange.es/moutte983/gstreamer/cvs/gstreamer-0.10.cvs12032007.setup.zip
> Installed into default location: <progs>\Common\GStreamer\0.10\
> 3)  Installed  GStreamer base plugin binaries v. 0.10 (from CVS on 
> 2007-03-12) from:
> http://perso.orange.es/moutte983/gstreamer/cvs/gst-plugins-base-0.10.cvs12032007.setup.zip
> 4)  Installed  GStreamer good plugin binaries v. 0.10 (from CVS on 
> 2007-03-12) from:
> http://perso.orange.es/moutte983/gstreamer/cvs/gst-plugins-good-0.10.cvs12032007.setup.zip
> 5)  Installed  GStreamer bad plugin binaries v. 0.10 (from CVS on 
> 2007-02-07) from:
> http://perso.orange.es/moutte983/gstreamer/cvs/gst-plugins-bad-0.10.cvs20032007.setup.zip
> 6) Installed gstplayer from 
> http://perso.orange.es/moutte983/gstreamer/gstplayer/gstplayer.zip by 
> copying gstplayer.exe into
>      <progs>\Common\GStreamer\0.10\bin\
> At this point I could  run gstplayer and play my test ogg, which it does 
> with a nice visualisation. However I couldnt play my test mpeg1, avi 
> (xvid), flac or wma (error messages). So I then:
> 7)  Installed  GStreamer ugly plugin binaries v. 0.10 (from CVS on 
> 2007-03-12) from:
> http://perso.orange.es/moutte983/gstreamer/cvs/gst-plugins-ugly-0.10.cvs12032007.setup.zip
> 8)  Installed  GStreamer ffmpeg plugin binaries v. 0.10.02 from:
> http://perso.orange.es/moutte983/gstreamer/releases/gst-ffmpeg/gst-ffmpeg-0.10.2.win32.zip
>      (extracted libgstffmpeg.dll into 
> <progs>\Common\GStreamer\0.10\lib\gstreamer-0.10\)
> Now I could play the test mpeg1 and avi (though only the audio played). 
> Flac still gave the error message and wma was just ignored completely. 
> But that's ok, this was progress.
> Now is where it starts to get nasty. I wanted to compile a simple test 
> program from the gst API manual. Sebastien says you can do this by 
> downloading his two CVS DEV packages (C headers and link libs), which I did:
> 9) Installed GStreamer dev package 0.10 (CVS) from:
> http://perso.orange.es/moutte983/gstreamer/cvs/11022007/gstreamer-0.10.cvs.win32dev.zip
>      (unzipped into new directory <progs>\Common\GStreamer\0.10.dev\)
> 10) Created a simple VS.NET 2003 C project (console application), with 
> one C file, and pasted in the short "hello world" audio player test 
> program from the gst API manual at:
> http://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/chapter-helloworld.html
>      and then:
>        a) setting the project's properties to reflect:
>              includes: <progs>\Common\GStreamer\0.10.dev\include\
>              libs: <progs>\Common\GStreamer\0.10.dev\lib\
>              link with: libgstreamer-0.10.lib
>              compile options: compile as C (not C++)
>              put output files in <progs>\Common\GStreamer\0.10\bin\
>        b) deleting the MS-specific #includes in stdafx.h
> 11) The frst problem was that it wouldnt compile due to lack of glib.h 
> (included in gst.h)
>       After some googling around I installed:
> http://ftp.gnome.org/pub/gnome/binaries/win32/glib/2.12/glib-dev-2.12.11.zip
>        into <progs>\Common\GStreamer\0.10.dev\
>     and added to my project's properties:
>        include dirs:  <progs>\Common\GStreamer\0.10.dev\include\glib-2.0\
>        link to:  glib-2.0.lib
> 12)  Now it wouldn't compile it couldnt find glibconfig.h (included in 
> glib's gtypes.h). Oops that seems to be in a lib directory,
>    so the project needs to include 
> <progs}\Common\GStreamer\0.10.dev\lib\glib-2.0\include\
> 13) Uhoh now libxml/parser.h (really) isn't there. More googling, then 
> installing:
>    http://www.zlatkovic.com/pub/libxml/libxml2-2.6.27.win32.zip and 
> adding libxml2.lib to project's links.
> 14) Whoops, compiler now says libxml2 needs iconv.h, so that means 
> installing:
>    http://www.zlatkovic.com/pub/libxml/iconv-1.9.2.win32.zip and adding 
> to iconv.lib to project's links
> 15) Now we can compile! But there's unresolved symbols in the link
>   (_g_signal_connect_data, _g_object_set, _g_type_check_instance_cast)
>   after grepping the .libs, give project a link to gobject-2.0.lib
> 16) Now we can link too!! So I eagerly hop over to the gst bin directory 
> and run my test.exe,
>   but Windows won't run it (more accurately, something that it 
> dynamically loads, as the test
>   prog does run and print stuff) as it needs avcodec-51.dll. A lot of 
> experimentally renaming files later,
>   it turns out to be libgstffmpeg.dll that needs it, but it didnt need 
> it when gstplayer.exe ran.
> 17) Dilemma time - is libgstffmpeg.dll needed to play an ogg file (which 
> is what the demo does)?
>   Or should I get the DLLs that libgstffmpeg.dll needs from somewhere? I 
> decide to firstly
>   try without it, as gstplayer.exe didn't seem to need it to play ogg. 
> Inexperience with gst, here.
> 18) Next problem - test program runs but now prints:
> "** (test.exe:1548): CRITICAL **: file 
> E:\devel-cvs\src\gstreamer\gst\gstinfo.c: line 413: assertion `category 
> != NULL' failed
> One element could not be created"
> 19) Not much help with this on the net, googled one post guessing about 
> gst's debugging macros needing to be
>   used, but not enough info on what to do. Ok, let's try with 
> libgstffmpeg.dll back in. Found the DLLs it needs here:
>   http://neuron2.net/dgavcdec/dgavcdec100a3.zip, unzipped them into gst 
> bin dir.
> 20) Well that stopped the test prog printing "One element could not be 
> created" but it still prints the critical assertion, and now it crashes 
> too. As do gstplayer.exe, gst-inspect-0.10.exe and gst-launch-00.10.exe 
> now :-(
> At this point I've decided to seek help on here..so HELP!!
> As a newbie I'll probably be hung for saying it, but gst looks a great 
> cross platform project which really needs to make (excuse the pun) 
> Windows an equal citizen, by having a proper package of binaries, dev 
> kits (including dependencies) and natively compilable sources and test 
> apps, with MS VS Express project files, that you can install and run out 
> of the box. I'd like to have a go at that, if someone will help a 
> complete GNU novice (gnuvice?) do it and tolerate lots of stupid questions!
> - John
> jodim wrote:
>> Hi,
>> 	After installing Christian Schaller's gstreamer cvs binaries including gst-python bindings for win32 and successfully testing gstplayer, tried to run a simple python script using python24 but the gst python module cannot find procedure "gst_segtrap_is_enabled" in gstreamer dll even though gst version is > 0.10.9. Checked exports on all libgstreamer-0.10.dll provided by the different binaries in http://perso.orange.es/moutte983/gstreamer/ but none of them export that function. Do let me know if there's something else I can do to help.
>> Many thanks,
>> jodim
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