[pvrusb2] Frame grab / stills capture ?

[Mike Isely]

On Tue, 12 Feb 2008, Michael Krufky wrote:

> Mike Isely wrote:
> > Guess maybe I need to look harder at getting uncompressed video working 
> > in the pvrusb2 driver...
> 
> 
> ...SLIGHTLY off-topic.....
> 
> The moment the pvrusb2 driver supports raw framegrabbing, it opens up 
> more possibilities.
> 
> It might be a good idea to keep the idea in the back of your head, of 
> allowing the driver to handle devices without an encoder.
> 
> For example:
> 
> Comparing Hauppauge 24xxx device against DViCO's FusionHDTV5 USB Gold:
> 
> BOTH use a cypress FX2 usb controller
> BOTH have the same basic FX2 command set
> BOTH have a cx25843 a/v decoder
> BOTH have a wm8775 adc
> 
> DViCO's device has ATSC/QAM support, but no encoder.
> 
> 24xxx has an encoder, but no ATSC/QAM support.
> 
> As far as getting analog framegrabber support, the only difference 
> between these two devices is the presence of the encoder in the 24xxx, 
> which encapsulates the raw video within the mpeg container.
> 
> Sure, I know that is a big difference...  but, other than that, the 
> same basic code would work on both devices.
> 
> 
> OTOH, the driver is mostly based on the fact that the device *does* 
> have a conexant mpeg encoder present... so, this idea might not really 
> be practical.  Just some food for thought :-)

Hmm, interesting...  Come to think of it, as of just a few weeks ago, 
the driver gained the ability to operate without the encoder...  Hmm...

  -Mike


-- 

Mike Isely
isely @ pobox (dot) com
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