[mpeg2] Re: question about the mpex and vbv buffer and vbv delay

[Samuel Rivas <samuel@dc.fi.udc.es>]

Luca Abeni wrote:
> Finally, I am (obviously) encoding CBR video, but a TS analyzer that I
> am using shows that the video bit rate is not that constant (it is
> almost constant, but there are periodic spikes). Maybe this can be the
> cause of the problem that I am seeing? If yes, does anyone know how to
> obtain a "more constant" bitrate (maybe some of the encoding parameters
> are not set in an optimal way for CBR encoding)?

  Do you know how does your tool analyse the bit rate? I wrote a little
program which simply looks for the PCRs and works the bit rate out
dividing the amount of bytes between each pair of consecutive PCRs by
the subtraction of those PCRs and it yields exactly 6000000 bits/seg
for all pairs of PCRs.

  I have other tool that says there is a small PCR jitter, but I don't
have the source and I have no idea about why is it saying that :(
 
> 			Thanks,
> 				Luca

  I hope that someone could post a more useful answer :)

  Regards

-- 
	Samuel