[MEncoder-users] size of AC3

[Nico Sabbi]

Tomáš Bažant wrote:
> does it mean that AC3 is constant bitrate?

mostly yes, but nothing prevents it from being vbr.
Please, don't top-post in any of mplayer lists: it's forbidden.
>
> Abu Zaher wrote:
>>> One more problem I found: is it possible to calculate the size (MB) of
>>> AC3 track in DVD without extracting it?
>>>
>>
>> These facts are true for most of the dvds:
>>
>> If the ac3 tract is 5.1 dolby surround, then it is 448 kbps.
>> It it is 2.0 dolby digital track then it is 192 kbps.
>> If it is a dts track then most probably 768 kbps
>>


not true: I've seen many more streams with 384 than 448 kb/s
 
 
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