[Bf-python] can't get audio volume changes via script

[flavio soares]

Great, that was it. Thanks again, Bastien!


2013/10/21 Bastien Montagne <montagne29 at wanadoo.fr>

> As said in the doc
> (
> http://www.blender.org/documentation/blender_python_api_2_69_1/bpy.types.Scene.html#bpy.types.Scene.frame_current
> ),
> you should use scene.frame_set() function instead of directly assigning
> to frame_current…
>
> Le lun. 21 oct. 2013 12:45:02 CEST, flavio soares a écrit :
> > Hi, Bastien,
> >
> > Thanks for the response. I had tried that before sending the e-mail -
> > I tried SoundSequence to see if it changed things, but it didn't. The
> > code below...
> >
> > for i in bpy.context.sequences:
> >     bpy.context.scene.frame_current = i.frame_start
> >     start = i.frame_start
> >     while start < i.frame_final_end:
> >         print(i.volume)
> >         bpy.context.scene.frame_current += 1
> >         start +=1
> >
> > ...will print also the same values 0.0 or 1.0 (only), depending on
> > where the cursor (frame_current) is when the script starts to run.
> >
> > Notice that the same behaviour happens to panning and blend_alpha (for
> > video strips) - it seems Blender sort of "caches" the volume or pan
> > value and always returns the first one, not updating it inside the loop.
> >
> > I tried the same code using:
> >
> > while start < i.frame_final_end:
> >                 bpy.ops.marker.add()
> >
> > And the markers were inserted accordingly, one on each frame. This way
> > I know that the change bpy.context.scene.frame_current += 1 is being
> > processed correctly.
> >
> > Any guesses?
> >
> >
> >
> >
> > 2013/10/20 Bastien Montagne <montagne29 at wanadoo.fr
> > <mailto:montagne29 at wanadoo.fr>>
> >
> >     You do not want to use bpy.types.SoundSequence here! It’s a type
> >     (and used this way, a constructor), not a data access!
> >
> >     You are probably looking for something like that:
> >
> >     for seq in bpy.context.sequence_editor.sequences:
> >         if seq.type is 'SOUND':
> >             print(seq.volume)
> >
> >     (Loop over that for all your frames of course).
> >
> >     Bastien
> >
> >
> >     On 20/10/2013 03:08, flavio soares wrote:
> >>     Hi,
> >>
> >>     The audio exporter to Ardour is pretty much done
> >>     <
> https://github.com/szaszak/blender_velvet/blob/blue_velvet/blue_velvet.py>
> >>     and fully functional.
> >>
> >>     I'm trying to expand it to get the audio fade keyframes, but it
> >>     seems it is not possible.
> >>
> >>     This code for example:
> >>
> >>     for i in bpy.context.sequences:
> >>         bpy.context.scene.frame_current = i.frame_start
> >>         start = i.frame_start
> >>         while start < i.frame_final_end:
> >>             print(bpy.types.SoundSequence(i).volume)
> >>             bpy.context.scene.frame_current += 1
> >>             start +=1
> >>
> >>     Prints only:
> >>
> >>     0.0
> >>     0.0
> >>     0.0
> >>     etc
> >>
> >>     ...when it should recognize the changes in volume (keyframes) and
> >>     print something like:
> >>
> >>     0.0
> >>     0.3
> >>     0.6
> >>     1.0
> >>     1.0
> >>     etc
> >>
> >>
> >>     Any guesses why this is so?
> >>
> >>     Thanks for the help. =)
> >>
> >>
> >>     _______________________________________________
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> >
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