[theora-codecs] theora ultra low bitrate support (vp3 style)

[Blibbler]

No. The "QT6 bug" only affects VP3 when you are scaling video on 
playback. It does not come into effect when you are playing back the 
video at 100% of the size.

Colin.

On Monday, June 16, 2003, at 01:02  AM, dan miller wrote:

> if the old codec has the "QT6" bug, does that mean you're running it 
> under QT5?  Quicktime 6
> definitely has performance issues itself.
>
> --- Colin Mckellar <c.mckellar at student.murdoch.edu.au> wrote:
>> Its is a G4/350 AGP.
>>
>> I wouldn't note it, except I can play a few movies smoothly I have 
>> with
>> this old codec, which I can't with the new one.
>>
>> Colin.
>>
>> On Sunday, June 15, 2003, at 01:25  AM, Mauricio Piacentini wrote:
>>
>>> This was reported by Colin before, but to be honest I could not
>>> reproduce
>>> his results. It looks like it could be a preprocessing threshold 
>>> issue
>>> (he
>>> mentioned it was happening on a Beige G3 I believe), but in my test
>>> machines
>>> I get the same decoding performance.
>>>
>>> Regards,
>>> Mauricio
>>>
>>>
>>>> The "fast" vp3 codec I have is one I got when I purchased the OSX
>>>> quicktime version (before it was open sourced.) Unfortunately, it is
>>>> affected by the QT6 bug. Released versions since it was open sourced
>>>> have been much slower at decoding. The latest version doesn't seem 
>>>> to
>>>> have a QT6 problem, but it decodes generally much slower than the
>>>> older
>>>> one that I have (when decoding without scaling.)
>>>>
>>>> The url for a sit file of the older codec can be found:
>>>> <http://mornmist.2y.net/~blibbler/On2_VP3OSX.sit>
>>>>
>>>> The newer codecs seem to encode faster than this one, and there are
>>>> slightly different results with decoding psnr numbers, but nothing
>>>> that
>>>> should justify the difference in decoding speed.
>>>
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