[Fwd: Re: [clug] Codec colour mangling (esp. with MythTV)]

Neil Pickford neilp at goldweb.com.au
Thu Jan 25 08:47:39 GMT 2007

The reason there is no Hue control for you to adjust is that you are not 
using NTSC the american composite analog tv standard.

The PAL system we use and Component sampling are not prone to hue 
(chroma phase) shift problems.

I suspect your assesment of a driver problem is correct.

I further suspect it was not found because if it was tested with your 
hardware, it was probably in the american centric world.

Becareful of advice originating from the USA on this issue.

Neil Pickford

Tony and Robyn Lewis wrote:
> Michael Still wrote:
>> Tony and Robyn Lewis wrote:
>>> I'm rolling back to the default 0.18 that comes with dapper.
> Which didn't help.
>> My spies tell me...
>> "uncomment the line //#define USE_ATI_PROPRIETARY_DRIVER_XVIDEO_HACK
>> in mythtv/libs/libmythtv/videoout_xv.cpp"
> Ick! Compile from source?
> Will give it a go, maybe over the weekend.
> My spies (err, Google) now are hinting that it's the "chroma planes" 
> that are switched.  This is an issue at the card level (i.e. at time of 
> receiving the signal) and to me smells of a driver problem.  Some people 
> fix it by adjusting the Hue.  But my 0.18.x version doesn't have any 
> option to adjust HSV.  The database has HSV values for each channel it's 
> found, but altering these in the database seems to make no difference.
> By rolling back to 0.20.x, maybe I'll have the options there.
> Thanks for sharing your intelligence sources :-)
> Tony

More information about the linux mailing list