Re: How to find play length of .ogg file using python?

[Marc Shapiro <mshapiro_42@yahoo.com>]

Digby Tarvin wrote:

> On Wed, Jun 14, 2006 at 11:19:08AM -0700, Marc Shapiro wrote:
>  
>
> > I am writing a program using pygame to play musical sound cues.  I need 
> > a way to determine the play length of a sound file.  I can get the 
> > length of .mp3 files with python-pymad.  I have also installed 
> > python-pyogg and python-pyvorbis.  It seems that I should be able to get 
> > the length of .ogg files with one of these packages, but the 
> > documentation and examples do not show how.
> >
> > I have googled for these packages and basically have found that 
> > documentation does not seem to exist, yet.  It was suggesated to check 
> > the docs for libvorbis, but I haven't been able to find this, either.
> >
> > The output of VorbisFile.info() seems to be an object with various 
> > attributes, probably including the play length, but the only attributes 
> > shown in the example are channels and rate.  The module is a .so file, 
> > so I can not look at python source to determine the other attributes and 
> > I would rather not have to download C source code and plow through 
> > that.  Is there a list of the attributes for this object, somewhere?
> >
> > Can anyone give me an easy way to find the play length of an .ogg file, 
> > or point me to where the documentation exists.
> >    
>
> I would take a look at the source for the 'ogginfo' command, or if
> performance is not important, just parse its output:
>
>  digbyt@voyager2:/home/digbyt> ogginfo /home/digbyt/work2/...
>  filename=/home/digbyt/work2/localize/testdata/alphabet.ogg
>  header_integrity=pass
>  stream_integrity=pass
>  file_truncated=false
>  version=0
>  channels=1
>  bitrate_upper=-1000
>  bitrate_nominal=128000
>  bitrate_lower=-1000
>  bitrate_average=84458
>  length=59.443084
>  playtime=0:59
>  
I am hoping for a pure python method of doing this, so parsing the 
output of ogginfo is not my prefered method, but it DOES work.

I have not had a chance to sort through the source for ogginfo, and 
doing so does not thrill me, but it may give me a hint what the 
attribute names might be for python-pyvorbis, thereby allowing me to 
stick to a python solution.

Has anyone else come across this, who might be able to tell me what the 
attribute names are?

Thanks.

--
Marc Shapiro

No boom today. Boom tomorrow. There's always a boom tomorrow.
What?! Look, somebody's got to have some damn perspective around here.
Boom. Sooner or later ... boom!

- Susan Ivanova: B5 - Grail