[Bf-python] option to choose executable instead of raising error inside function

[flavio soares]

Hi, Bastien,

Thanks for the link. I'll try to mess with it, but I think the addon part
is ok. The problem is really calling a window to choose the executable and
storing it in a variable.


2013/10/15 Bastien Montagne <montagne29 at wanadoo.fr>

>  Hi Flavio,
>
> Think you are looking for AddonPreferences ?
>
> http://www.blender.org/documentation/blender_python_api_2_69_1/bpy.types.AddonPreferences.html
>
> Bastien
>
>
> On 15/10/2013 19:03, flavio soares wrote:
>
>    Hi,
>
>  I'm doing an exporter to ardour and it runs an external ffmpeg. I'm
> wondering if there is a way of letting user point to a local ffmpeg
> executable in case it is not recognized by "which". The idea is to replace
> the RuntimeError with something like:
>
> with open(self.filepath) as file:
>             ffCommand = self.filepath
>
>  but this only works inside classes.
>
>
>
>  Relevant code is below:
>
>  this is the main class:
>
> class ExportArdour(bpy.types.Operator, ExportHelper):
>     """Export audio timeline (including audios from videos) to Ardour"""
>     bl_idname = "export.ardour"
>     bl_label = "Export to Ardour"
>     filename_ext = ".ardour"
>     filter_glob = StringProperty(default="*.ardour", options={'HIDDEN'})
>
>     @classmethod
>     def poll(cls, context):
>         if bpy.context.sequences:
>             return context.sequences is not None
>
>     def execute(self, context):
>         scene = bpy.context.scene
>         startFrame = scene.frame_start
>         endFrame = scene.frame_end
>         fps, timecode = checkFPS()
>
>         system = bpy.context.user_preferences.system
>         audioRate = int(system.audio_sample_rate.split("_")[1])
>
>         audiosFolderPath, ardourFile = os.path.split(self.filepath)
>         ardourBasename = os.path.splitext(ardourFile)[0]
>         audiosFolder = audiosFolderPath + os.sep + "Audios_for_" +
> ardourBasename
>
>         Session = createXML(startFrame, endFrame, fps, timecode,
> audioRate,
>                             ardourBasename, audiosFolder)
>
>         runFFMPEG(sources, audioRate, audiosFolder)
>         writeXML(self.filepath, Session)
>
>         return {'FINISHED'}
>
>
>  ..........that calls this function (notice the RunTime error):
>
> def runFFMPEG(sources, audioRate, outputFolder):
>     if which('ffmpeg') is not None:
>         if (os.name == "nt"):
>             ffCommand = ffmpegPath + os.sep + "ffmpeg.exe"
>         else:
>             ffCommand = "ffmpeg"
>     else:
>         raise RuntimeError("You don\'t seem to have FFMPEG installed on
> your system. \
>                             Please install it and re-run the Ardour
> exporter.")
>
>     if (os.path.exists(outputFolder) is False):
>         os.mkdir(outputFolder)
>
>     for source in sources:
>         basename, ext = os.path.splitext(source['name'])
>
>         input = source['origin']
>         if (input.startswith("//")):
>             input = input.replace("//", "")
>
>         output = outputFolder + os.sep + basename + ".wav"
>
>         # Due to spaces, the command entries (ffCommand, input and output)
> have
>         # to be read as strings by the call command, thus the escapings
> below
>         callFFMPEG = "\"%s\" -i \"%s\" -y -vn -ar %i -ac 1 \"%s\"" \
>                      % (ffCommand, input, audioRate, output)
>         call(callFFMPEG, shell=True)
>
>     return {'FINISHED'}
>
>
>
> thanks.
>
>  flavio
>
>
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