[theora] Theora vs. Nullsoft NSV

Wed Nov 13 12:46:03 PST 2002

Sorry Dan
I am not paying too much attention to details (as in getting your name
wrong) its okay you can call me Tim or Kim if you like ;-}
-----------------------------------------------------
The tests using VP3 were carried out with the default settings and the
quick compress turned off.

I dont have a problem with high motion I film firedancers and stream
the footage over a lan in a night club. It looks on the big TV screens
to be of similar quality to Good Mpeg1

Dont know much, but I know what I like and I love this little codec.

---------------------------------------------------------------------------
For those doing the grunt work of rewriting this codec and extending its
feature
set I will continue to sing your praises and test each release.
For myself I havent cut code since 1982 when it was all basic and cobol.
Wish I could do more but the curve has gotten too great and
so now I teach people the fascination of the light switch (as in on/off, or
0/1)
the basis of all computing.

----- Original Message -----
From: "Dan Miller" <dan at on2.com>
To: <theora at xiph.org>
Sent: Thursday, November 14, 2002 2:32 AM
Subject: RE: [theora] Theora vs. Nullsoft NSV

if your encode speed was that fast, you probably had "quick compress" turned
on, which will reduce motion estimation. This may explain your poor results
on high-motion material.

-----Original Message-----
From: Jim Barnes [mailto:tojimbarnes at hotmail.com]
Sent: Wed 11/13/2002 7:19 AM
To: theora at xiph.org
Cc:
Subject: Re: [theora] Theora vs. Nullsoft NSV
Thanks Ian I did mean to mention this but got caught up in rationalising

For those that read my comments as to the quality I obtained from the
various
codec comparisons. One thing I forgot to mention was the speed.

This little codec is quite fast when used out of either Premiere, Ulead MSP
or
even FlaskMpeg It generally (as in on average) will encode at about half
real time.
Thats 12.5 fps for those on PAL. This is dependent on the settings but I
have never had it
run slower than 8 fps. This is on a frame size of QCIF or 352 x 288.
 DV will encode at about 5 fps full PAL 720 x 576 and this is on my PIII 1
Ghz with 512 PC133 Ram.
This is encoding either AVI or QT. However if you use QT to code I find it
can slow right down or at least it seems to take longer. (Not that I sit and
watch the little blue squares)
On the NLE's it shows me the frame rate. So compared to the other codecs I
put this at about 8 on a
scale of one to ten. Nothing beats smart rendering on Ulead MSP or Premiere
when it doesnt have to
re-encode.

Of course thats unfair as it not really encoding anything just copying bits
of the already encoded file

As far as decode speed goes all I can say is that it plays back at 25fps
with no dropouts in either video or audio and starts fast in WMP and a bit
longer in QT (2-3 seconds)

I dont want to get into product bashing I am only reporting the results as I
percieve them
my advice to anyone wanting to know is try it for yourself and see. You will
be surprised.

----- Original Message -----
From: "Dan Miller" <dan at on2.com>
To: <theora at xiph.org>
Sent: Wednesday, November 13, 2002 1:55 AM
Subject: RE: [theora] Theora vs. Nullsoft NSV

<p><p>> * One thing not mentioned by those who tested the codecs is encode and
decode speed.  This is a primary factor in designing a codec.  It's
relatively easy to develop a new codec that beats existing products at
bitrate/quality if you don't care at all about performance.  The challenge
is to create a codec that is superior at quality/bitrate, but is also low
enough in complexity to work well on typical platforms of the day.  My
feeling is that VP3 is pretty good in this area too, but could be improved.
Our hope is to increase quality/bitrate of Theora without substantially
adding to the CPU requirements.  Comments on this strategy are welcome.
>
> - dbm

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