Trim Audio File

[Sudarshan Bisht]

Thanks all for your suggestions.


On Thu, Oct 6, 2011 at 9:18 PM, Icarus Alive <icarus.alive at gmail.com> wrote:

> On Thu, Oct 6, 2011 at 1:05 PM, Sudarshan Bisht
> <bisht.sudarshan at gmail.com> wrote:
> > I need to trim down size/duration  of an audio file, for example I have a
> 5
> > MB audio file and I want to create an audio file having only 1 MB of size
> or
> > 60 seconds of duration.
> > So to do this I need to first decode original audio file
> > completely/partially and then encode the raw samples again until it
> reaches
> > 1MB/60 sec.
> > Is there any other optimized way ?  For example playing with audio
> headers.
> >
>
> Not sure if your end goal is something like "Audio thumbnails" e.g.
> fixed size/duration audio samples, but if it is, you'd find some good
> clues in here http://www.patentstorm.us/patents/7386357.html
> But then, you see, it is patented :-). Never the less, you'd note that
> fixed size, from the beginning of an audio file isn't a good idea, for
> example if vocals do not even start in the first 60 mins of a song
> (e.g. a song thumbnail/sampler).
>
> the "mad" element has a src query API that seems to permit determining
> the position, length -- which might come in handy to raise an event
> when you reach a certain position in the file, s.t. you terminate
> dumping it to file, and quit pipeline. This is coming from someone who
> has spent a very little time, that too only recently with gstreamer,
> and not very familiar with the API.
>
> And then you have this
> http://mp3splt.sourceforge.net/mp3splt_page/home.php
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-- 
Regards,

Sudarshan Bisht
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