QTVRs (was: Rev on Intel iMacs)

Ian Wood revlist at azurevision.co.uk
Tue Mar 14 06:34:20 EST 2006


On 13 Mar 2006, at 17:13, Trevor DeVore wrote:

> On Mar 13, 2006, at 8:31 AM, Ian Wood wrote:
>
>> 2.7.1 !?!
>>
>> I just had a look at a QTVR file - zooming in and out was quite  
>> jerky, in fact the performance was appalling overall, frame rates  
>> must have been in single figures on a dual G5. On the other hand,  
>> simply showing a QTVR file is no longer using 100% of a processor...
>
> This is a result of the Rev transition to the newer QuickTime APIs  
> that report how often an application needs to idle QuickTime  
> movies.  How often you idle a QTVR determines how smooth the  
> playback is.  It should be fixed in the 2.7.1 release but for the  
> time being you can reduce the idleRate property to something like  
> 10 and see really smooth playback.

Bingo! Thanks Trevor. Although I did notice some odd effects with  
resting CPU-usage with different idleRates:
16 or lower - 90-100%
17 - 4-8%
18-19 - 9-12%
20 - 30%
over 20 it ramps down again



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