[mythtv-users] Recording/live-tv video quality (aka do PVR150 encoders suck?)

Brad DerManouelian myth at dermanouelian.com
Mon Jan 28 03:39:20 UTC 2008

On Jan 27, 2008, at 7:24 PM, Scott Traurig wrote:

> I finally took the plunge into some equipment that has allowed me to  
> really see what is going on with respect to mythtv video quality and  
> this has begged a few questions.
> Previously I had a nice but old Sony tube and used composite NTSC  
> video output of the Nvidia 6xxx motherboard. It was tough to tell  
> what was going on, of course. Now I have this beautiful Philips LCD  
> 1080p panel that I got on sale at Costco and a DVI connection.Ubuntu  
> is set to run the standard 1080p resolution through the Nvidia GPU.  
> Results are as follows:
> PC stuff looks fabulous.
> Commercial DVD playback looks fabulous whether it’s 4:3, 16:9 or  
> widescreen and whether it’s coming off the DVD or from an ISO file.
> Live and recorded TV using NTSC composite from my set top box into  
> the PVR150 capture card looks terrible compared to the same signal  
> out of the STB right into the Philips panel. I’ve got all profiles  
> set to run 6Mbps/9Mbps (DVD quality) and going higher doesn’t help  
> any.
> Live and recorded TV using the PVR150 tuner looks worse still.
> I can understand #4 but not necessarily #3. Clearly the decoders and  
> the Nvidia hardware do a fabulous job based on the DVD output.  
> However it appears that the PVR150 encoders pretty much suck. Is  
> this essentially the deal? Is there a better solution for tuning/ 
> encoding?

Try using s-video on the PVR if you can.

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