> Warp wrote:
>> Orchid XP v7 <voi### [at] devnull> wrote:
>>> Anyway, when I play Huffyuv videos, the ffdshow logo pops up in the 
>>> system tray, so I assumed ffdshow was doing the decoding. So I 
>>> uninstalled ffdshow, thinking it must be some kind of bug. However, 
>>> my computer still understands Huffyuv. And then I noticed an entry 
>>> that says "Huffyuv (Remove only)". So I uninstalled that. And yet my 
>>> computer *still* knows how to decode Huffyuv, despite there being no 
>>> codec for it installed...
>>
>>   Just because there's no codec named "huffyuv" doesn't mean there's no
>> codec which understands huffyuv. It may even be a Windows system-level
>> support.
>>
>>   (Also, some players might have internal support for huffyuv. Which
>> player are you using?)
> 
> VirtualDub manages to both encode and decode it. (As I said, if you 
> *play* one, the playback is wrong. But if you decode one to file, the 
> decoded file is correct. Which, obviously, is extremely odd.)
> 
> Windows Media Player can play it.
> 
> Windows Explorer manages to generate thumbnails.
> 
> Installing a newer version of ffdshow did alter the thumbnails in 
> Windows Explorer, but otherwise had no effect...
> 
> I used to use Huffyuv a lot and never had any kind of problem like this, 
> so I'm a little confused as to what's gone wrong.
> 

Have a look at your registry:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Drivers32

(that's a single line...)

I have entries of the form VICD.XXXX where XXXX is the FourCC of the 
video codec.

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