[vdr] Re: packet size of recordings

["Rene Bartsch" <vdr@bartschnet.de>]

----- Original Message -----
From: "Klaus Schmidinger" <Klaus.Schmidinger@cadsoft.de>
To: <vdr@linuxtv.org>
Sent: Friday, January 10, 2003 12:43 PM
Subject: [vdr] Re: packet size of recordings


> Rene Bartsch wrote:
> >
> > ----- Original Message -----
> > From: "Klaus Schmidinger" <Klaus.Schmidinger@cadsoft.de>
> > To: <vdr@linuxtv.org>
> > Sent: Friday, January 10, 2003 12:26 PM
> > Subject: [vdr] Re: packet size of recordings
> >
> > > Rene Bartsch wrote:
> > > >
> > > > ----- Original Message -----
> > > > From: "Klaus Schmidinger" <Klaus.Schmidinger@cadsoft.de>
> > > > To: <vdr@linuxtv.org>
> > > > Sent: Thursday, January 09, 2003 6:09 PM
> > > > Subject: [vdr] Re: packet size of recordings
> > > >
> > > > > Johannes Schoeller wrote:
> > > > > >
> > > > > > hi all!
> > > > > >
> > > > > > i want to optimize the transfer rate of my nfs based client
(=vdr)
> > > > server
> > > > > > solution.
> > > > > > so my question is: what's the size of the packets transferred by
> > VDR.
> > > > > >
> > > > > > maybe the question is not asked right for network pros. :) so to
> > make it
> > > > a
> > > > > > bit clear: i want to read BIG files. but i don't read them at
one,
> > but
> > > > in
> > > > > > small chunks. (more like streaming). and i would like to know
how
> > big
> > > > these
> > > > > > chunks are.
> > > > >
> > > > > Take a look at VDR/remux.c. It produces packets of at most 2048
byte.
> > > > > But not all packets necessarily have that size, they may as well
be
> > > > smaller.
> > > > >
> > > >
> > > > Does that mean you can influence packet-size by few changes in
remux.c?
> > > >
> > > > Setting the packet-size to VOB-compliant value would make it
unnecessary
> > to
> > > > repack for creating DVDs.
> > > >
> > > > This would be great ...
> > >
> > > You could try that by changing the value in remux.c. But be aware that
> > this
> > > is only the _maximum_ packet size - there may as well be smaller
packets.
> > >
> >
> > Is it possible to add some function, which sets a minimum packet size?
(I
> > don't know the internals of DVB and MPEG, so I ask).
>
> Should be possible - but what sense would that make, apart from blowing up
the file
> size??
>

My idea was to set min and max to VOB-compliant values. So the file only
needs to be remuxed for DVD-processing.

Rene



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