[vlc] Re: measuring encoding delay

[Marcelo Manzato]

Hi Mark, 

--- Mark Moriarty <mfmbusiness at earthlink.net> wrote:

> Interesting question.  By "encoding time" do you
> want to measure the full
> time from when a frame is first sent to be encoded,
> to the point where it
> has been encapsulated and is ready for transmission?

Exactly!!

> Might want to try a debug build, calls to the
> low-level time functions, let
> it run for say 1000 frames, then take the average. 

I'm using vlc under windows in order to capture and
encoding the data. I'm not being able to compile the
source for win32, either by cygwin or
cross-compilation... nevertheless, I'm afraid unix
time functions like time() and clock() will not work
under windows. Is there a way to debug the available
windows executable version of vlc without having to
add time functions into the source?

Thanks for your help

Regards
Marcelo Manzato


> -----Original Message-----
> From: vlc-bounce at videolan.org
> [mailto:vlc-bounce at videolan.org] On Behalf Of
> Marcelo Manzato
> Sent: Tuesday, April 04, 2006 3:46 PM
> To: vlc at videolan.org
> Subject: [vlc] Re: measuring encoding delay
> 
> Hi Simon, thanks for your answer!
> 
> --- Simon Hailstone <simon.hailstone at gmail.com>
> wrote:
> 
> > For a really simple experimental approach, and if
> millisecond accuracy 
> > isn't a priority, how about pointing your webcam
> at a clock?  View the 
> > resulting stream on another PC, and note the
> difference between 
> > "wall-time" and the time displayed on the
> stream-receiving PC.
> 
> I have already thought about that, however, in this
> case I will be measuring
> the transmission and the decoding time as well. I
> want a way to measure just
> the encoding...
>  
> > Alternatively, start up vlc, begin
> > encoding/streaming, and use
> > Ethereal to observe the time that elapses between
> initialisation and 
> > the generation of the first packet with video in
> it's payload...
> 
> It seems to be a good solution, however, I didn´t
> understand how I will
> capture the initialisation time... Have you thought
> about that?
> 
> Regards
> Marcelo Manzato
> 
> 
> 
> 		
>
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