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rds_correia

02-25-2004 06:16 PM

VBR audio on KVCD or KDVD allowed?

Hi guys,

Quote:

Originally Posted by russiansexpat

"The audio stream must be MPEG-1 layer II, with a bit-rate ranging
from 32 to 384 kbits/sec bit-rate (i.e. the audio stream _is_ allowed
to be VBR!) with up to 2 stereo or 4 mono channels, or 1 extended
MPEG-1/2 multichannel (5+1) surround sound stream." --

Can someone check this is really inside the specs or even not specified in the specs?
I could imagine myself producing 192 vbr mp2s with the size of a cbr 160 :lol:
Thanks

jorel

02-25-2004 06:21 PM

Correia,
i few months i had big problems trying mp2 vbr.
DSPGuru from d9 help me a lot but seems that
some player can use, anothers don't.
you need to test your player!

:)

rds_correia

02-25-2004 06:31 PM

Quote:

Originally Posted by jorel

Correia,
i few months i had big problems trying mp2 vbr.
DSPGuru from d9 help me a lot but seems that
some player can use, anothers don't.
you need to test your player!

:)

Hi Jorel,
I can't stop saying it's great seeing you around again :D .
Fair enough in terms of mp2 vbr.
That should mean it's not inside the specs.
For a minute I was wondering if russian friend had found it in the specs.
Obviously I misunderstood.
Cheers mate

jorel

02-25-2004 07:02 PM

i found the links if you want test:

http://forum.doom9.org/showthread.php?s=&threadid=61808

http://forum.doom9.org/showthread.ph...0&pagenumber=1

but i will try in the next few days this guide:

http://hypercubemx.free.fr/html/how_...5_1__svcd.html

if you like and want to try,
we can start a new thread in audio forum or/and portuguese forum too,ok?

:)

Jellygoose

02-26-2004 07:20 AM

I tested VBR MP2 a while ago on my player, and it played it flawlessly. The problem is on the one hand that the audio size is unpredictable in VBR setting with Headache.

Another issue I think Phil pointed me on this one is that bitrate allocation in VBR MP2 mode is not very efficient. that might lead to the scenario that your VBR MP2 (varying between 96 and 192 kb/sec) could actually be of worse quality than CBR @128 or 112kb/sec... :?

Dialhot

02-26-2004 07:45 AM

Quote:

Originally Posted by Jellygoose

Another issue I think Phil pointed me on this one is that bitrate allocation in VBR MP2 mode is not very efficient. that might lead to the scenario that your VBR MP2 (varying between 96 and 192 kb/sec) could actually be of worse quality than CBR @128 or 112kb/sec... :?

That's exactly that. Great memory Jellygoose !