Just A Minute

 
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Re: What mp3 quality do you want?

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charles_454545Jul 22, 2009
 

 
--- In just-a-minute@..., "Clitheroe Kid" <clitheroekid@...> wrote:

> Someone else is *very* interested in this thread - me!
>
> I think you will find that flvstreamer is capable on its own of
> capturing the flv stream (which is actually an aac file inside
> an flv wrapper), without any involvement of get_iplayer.

Right. get_iplayer is a perl "glue" script that uses other
tools like lame, mplayer, and flvstreamer, and ffmpeg to do
the heavy lifting.

> It's get_iplayer that's converting your aac file to mp3.
> If you cut get_iplayer out of the picture you will simply
> get the flv stream, with an aac file wrapped up inside it.
>
> And there are lots of programs which can extract an aac
> file from the flv wrapper, e.g. ffmpeg.

Right again. This is exactly what get_iplayer is doing --
it pulls down the flv with flvstreamer, then runs it through
ffmpeg to output an aac.

What I'm planning to do for the mp3s is what you describe,
then faad2 to decompress the aac into a wav,
then audacity to trim off the adverts and off-topic continuity,
then lame to re-encode as an mp3.

Hopefully we can also trim those source aac files with QT Pro,
as Robert suggests, and put that online as well. It's got a
shorter lineage, is half the filesize, and should play on
people's iPods/iTouches/etc.

I'm positive this is overkill for a show that will
only have possibly a dozen episodes broadcast per year,
but it's perversely fun to talk through the process :)

> Please tell me: what Operating System are you using?
> This makes a *big* difference to how get_iplayer and
> flvstreamer work!

Fedora 11, which is a version of Linux.

cheers,
Charles

 
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