[FFmpeg-devel] [DOC] FFSERVER Configuration Files.
Piero Bugoni
ffmpeg.devel
Wed Aug 8 19:32:23 CEST 2007
--- Michael Niedermayer <michaelni at gmx.at> wrote:
> > +# Settings:
> > +#
> > +# The Q value is pretty important here. Values of around 5 to 7.5
> > +# give a reasonable compromise between stream width, and image quality.
> > +# Make sure to match the settings in this file with those on the command line.
> > +# in this instance values grater than 10 will probably make image indiscernable.
> > +#
> > +# Some additional settings for higher quality, but a fatter stream:
> > +#
> > +
> > +# Qmin/Qmax=1, vbr~=12000, vbuf=52(min)
> > +# Qmin/Qmax=2, vbr~=7100, vbuf=33(min)
> > +# Qmin/Qmax=3, vbr~=5200, vbuf=22(min) good quality/stream compromise
> > +# Qmin/Qmax=4, vbr~=4800, vbuf=21(min)
> > +# Qmin/Qmax=5, vbr~=4000, vbuf=19(min)
> > +# Qmin/Qmax=6, vbr~=3200, vbuf=13(min)
>
> constant qp encoding is not suitable for streaming over a channel with
> limited bandwidth
>
OK.
(How limited)? I have around 320Kb/s upload speed to the net.
I based by figures on the presumption that others would have similar. I do not have much interest
in tweaking things down to the dial-up level. I figured around 320Kb/s approaches bare minimum.
So, If you give a little more detail, I will include it in the notes.
The Q value was fixed so as to help me figure out the values for the other parameters that depend
on it. Of course a person can choose a range.
(I should probably point this out in the notes.)
Thanks,
P.
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