Again, you are the one that sets in the encoder how much bandwidth you want.
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.
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).
Best regards
Sergio
Salvatore Frandina escribió:
Hi Sergio,
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.
At the moment I'm not interested in quality, but only in video
bandwidth consumption.
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.
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?
The values that I have measured are strange for me, but I can't find
documentation about video bandwidth as this
http://www.voip-info.org/wiki/view/Bandwidth+consumption.
Thank
--
_______________________________________
Salvatore Frandina
website: http://frandinas.altervista.org
mail: [email protected] <mailto:[email protected]>
_______________________________________
--
_____________________________________________________________________
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
asterisk-video mailing list
To UNSUBSCRIBE or update options visit:
http://lists.digium.com/mailman/listinfo/asterisk-video
