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Again, you are the one that sets in the encoder how much bandwidth you
want.<br>
<br>
Also vlc, ffmpeg and the like are vbr encoders for *movies*, so the
bandwith you set is the media, so expect BIG peaks of bandwidth,
especially on I Frames, followed by very very small P frames. For
example that is the reason for the delay of video using standard mp4
movies and h324m (as you transmit at a fixed bitrate). You can try to
control a bit the output of the encoder (a bit). I had to do some other
techniques (like variable fps) in app_transcoder to be able to control
that bitrate peaks.<br>
<br>
You should use a CBR encoder, but it AFAIK there is no one available in
open source. If you want to control the maximum of the peaks you can
also try by setting a constant quantizer, but quality is going to be
veeeery bad (as you will have to set a very low q).<br>
<br>
Best regards<br>
Sergio<br>
<br>
<br>
Salvatore Frandina escribió:
<blockquote
cite="mid:d116c1f91003130258v691ec1e5gbce5036ccd8fbb4c@mail.gmail.com"
type="cite"><br clear="all">
Hi Sergio,<br>
<br>
I know that the bitrate depend from information content of source. I
use VLC as source that transmits still image CIF picture with 1 fps and
format YUV 4:2:0.<br>
<br>
At the moment I'm not interested in quality, but only in video
bandwidth consumption.<br>
<br>
I have taken in account the sixth column IP BW of Wireshark capture
file and with Matlab I have extract the Probability Density Function.
The mean and max bandwidth values are very high respect how I'm
expecting.<br>
<br>
I would like to know what can be the total video bandwidth with H263p
codec and H264 codec of CIF picture with 1 fps and format YUV 4:2:0?<br>
<br>
The values that I have measured are strange for me, but I can't find
documentation about video bandwidth as this <a moz-do-not-send="true"
href="http://www.voip-info.org/wiki/view/Bandwidth+consumption">http://www.voip-info.org/wiki/view/Bandwidth+consumption</a>.<br>
<br>
<br>
Thank<br>
<br>
-- <br>
_______________________________________<br>
Salvatore Frandina<br>
website: <a moz-do-not-send="true"
href="http://frandinas.altervista.org">http://frandinas.altervista.org</a><br>
mail: <a moz-do-not-send="true"
href="mailto:salvatore.frandina@gmail.com">salvatore.frandina@gmail.com</a><br>
<br>
_______________________________________<br>
<br>
</blockquote>
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