How to dump a stream faster than real time...

andrea sarkiaponius at
Mon Mar 14 08:54:50 PDT 2011

On Mon, 2011-03-14 at 16:26 +0200, Stefan Kost wrote:
> On 12.03.2011 17:59, andrea wrote:
> > Hi,
> >
> > I try again since my previous message was ignored. If I'm asking the
> > wrong mailing list just let me know.
> Nobody is ignoring your message. It could just mean that no one has an
> answer.

Sorry, I wouldn't mean to be unpolite.

> > I'm using a command line like the following to download old episodes of
> > some audio programmes of italian broadcasting company (Rai).
> >
> > gst-launch-0.10 gstrtpsession bandwidth=40000000 rtspsrc
> > location=rtsp:// connection-speed=2100000 ! decodebin2 ! wavenc !filesink location=prova.wav
> Why do you create an extra rtspsession? It won't be used. Both plugins
> have several examples in the manual.

I tried this way because of the bandwidth property of gstrtspsession.
Indeed it makes no difference, as you said.

It seems really hard to find a solution. That's a pity, because
gstreamer seems the only way to access RTSP streams through
TelecomItalia routers. Actually, I found that ffmper does it too, but it
has no option to control the speed nor the bandwidth.

Best regards and many thanks.

> Stefan
> > Actually, the episodes are not real streams, but just RealAudio files
> > that you can only access via RTSP.
> >
> > The above command line works perfectly but, despite the "bandwidth" and
> > "connection-speed" options, to download the file it simply takes exactly
> > the duration of the episode (they usually last 45 minutes each).
> > I've using mplayer too, to do the same, and it has a wonderful option
> > "-bandwidth" which, with a value, say, of 4000000, just lets you
> > download the same file above in less than one minute!
> >
> > I'm wondering if there is some way to do the same with some gstreamer
> > pipeline. I mean, some way to accelerate the download just as mplayer
> > does. It would be very very nice because mplayer has problems with some
> > ADSL router and some networks here in Italy, while gstreamer does not.
> > Best regards.
> >
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