On 26 Nov 2003, Florin Andrei wrote:
> > It's necessary to leave room for peaks or spikes in the bitrate -
> > exceeding the legal limit even briefly will cause playback problems
>
> Right, but as far as m2v and mpeg2enc, _isolated_ (disregarding DVD
> limits, other tracks, etc.), are concerned, -b sets a HARD limit, never
> to be exceeded, is that correct?
No. It's a very strong hint but you will (I have) see (very) brief
spikes above that. It's not a brickwall limit...
When creating SVCDs for example the limit's 2500 but I will see peaks
(very short, infrequent) a few percent higher - 2600 or so.
> I guess what i'm asking is, if you get all the numbers right, you should
> be safe on the m2v side, isn't it true?
I prefer to be cautious/safe and allow for a few percent overshoot on
the peaks. Besides which employing a couple of the things mentioned
earlier (-E -8, -R 0) will lower the rate enough that specifying a max
of 9800 is meaningless because it won't get that high ;)
Cheers,
Steven Schultz
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