[FFmpeg-devel] [DOC] FFSERVER Configuration Files.

Michael Niedermayer michaelni
Fri Aug 24 17:46:39 CEST 2007


On Fri, Aug 24, 2007 at 06:56:39AM -0700, Piero Bugoni wrote:
> > > That being said, pick one file you reject, edit it to your liking, post it
> > with
> > > the appropriate command line, and I'll put it to work.
> > 
> > just remove the VideoQMin/Max
> > and add VideoBitRateRange 0-<something _larger_ than the VideoBitRate>
> There is no option mentioned in the documentation for "VideoBitRateRange".

the documentation is in ISO c format

> If no "VideoQMin/Max" settings are mentioned will the Q vary automatically up
> to the limit allowed for the bitrate? Or, Between .1 and 31, or something like
> that?


> As I have said before, 
> 1) No image with a "Q" more than 12 did I consider worthwhile for anything.
> 2) Security camera applications mean that a face must be recognizable.

look, if your connection can transmit at 500kbit/sec and you set max rate
500 and bitrate somewhat lower and libavcodec chooses lets say qp=20 that
means libavcodec cannot encode the images within the bitrate at a lower qp
if you force qp=5 your stream will end up needing maybe 5000kbit/sec and you
will not recognize any faces because you will not see anything simply
because your network is too slow


what VideoQMin=Max=3 is saying is like
i want the 3rd best car
while VideoBitRateRange is saying i want the best car
which i can afford with the money i have available

(i dont need to mention that you wont get the 3rd best car if you dont pay
for it)

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

I do not agree with what you have to say, but I'll defend to the death your
right to say it. -- Voltaire
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