[mythtv-users] PVR 250 Interlaced Playback issues on mythfrontend

Joseph Kennedy josephk at mac.com
Sat Sep 20 21:15:07 EDT 2003


Interesting Mark, thanks for the input.

Anyone with a G400 using dfbmga having this same problem?...or does it  
not matter what tv out you are using? I had heard that the drivers are  
field aware, but then again if the program playing the video is not,  
you'd probably still have a problem. No?

--Joe

On Thursday, September 18, 2003, at 03:56 AM, Mark Edwards wrote:

> hey Joe,
>
> having the same issue with DVB playback. I have had a look at the
> possibility for adding deinterlacing, and xine has a nice deinterlacer  
> that
> could possibly be slotted in without too much effort... havn't quite  
> got a
> round tuit yet though..
>
> Mark
> ----- Original Message -----
> From: "Joseph Kennedy" <josephk at mac.com>
> To: <mythtv-users at mythtv.org>
> Sent: Thursday, September 18, 2003 2:37 PM
> Subject: [mythtv-users] PVR 250 Interlaced Playback issues on  
> mythfrontend
>
>
>> Hey all,
>>
>> I was wondering if anyone else is having a problem with the interlaced
>> recordings of the PVR250 when outputting to a TV.  I'm not talking
>> about the initial jitter in playback when  changing channels, but the
>> fields of the interlaced stream appearing out of order.  I've heard
>> Isaac refer to it only in terms of "change the field order" or enable
>> De-interlacing, but searching through the list since last night hasn't
>> yielded anything else.
>>
>> I would like to not enable de-interlacing since it causes ghosting in
>> motion, and on my tv this looks like interlacing artifacts.  Can  
>> anyone
>> offer any advice? Even when it appears that the fields are in the
>> correct order after 5 to 10 minutes they will go out of order and
>> everything gets pretty ugly. I'm using Jitter Reduction, Experimental
>> A/V, and Extra Audio Buffering.
>>
>> I am running Mandrake 9.1 on a separate backend and frontend.  The
>> backend has 2 PVR 250's and appears to capture perfectly even when
>> running at the same time.  It's a P3 800 with 650MB of PC133, an 8GB
>> Seagate set to master with a 120GB WD set to slave.  Buffer goes to  
>> the
>> WD as well as all recordings.  DMA is on, and the noatime flag is set
>> for the WD.  My mpg_buffers = 50, and I'm capturing at 5.5Mbit/sec  
>> with
>> peak at 6.5, resolution set to 720x480, stream_type =dvd,
>> dnr_mode=3,dnr_spatial=2,dnr_temporal=4.
>>
>> My frontend is an XP2100 with KD7 mobo, 1GB of PC2700, a Geforce 3
>> Ti200 (4363 drivers) running only TV out with nvtv, flicker=0,
>> sharpness=50, res=640x480 ... 20GB 7200-RPM WD and an 80GB Maxtor
>> 7200-RPM. I'm using over-scan with nvtv, mythfrontend niced to -15,  
>> all
>> under WindowMaker. SB Live for sound, onboard disabled.
>>
>> Any advice would be greatly appreciated.  Maybe I need to patch for
>> better de-interlacing rather than relying on myth to output the
>> original fields/frame in proper time?
>>
>> --Joe
>>
>>
>
>
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