[MPlayer-users] Interleaving artefacts when capturing from TV

[Kichigai Mentat]

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On Mar 21, 2006, at 17.53, wim delvaux wrote:

> If I capture a PAL movie in 640-480 according to the docs I could get
> interleaving artifacts ,,, and I do
>
> Again according to the docs this could require too excessive  
> bandwidth and
> hence CPU usage. I think I get this because my audio video is out  
> of sync
> (probably because of high CPU usage)
>
> I want do get rid of these artefacts yet capture in a high resolution.
> The docs suggest to use a deinterlacing filter (-vf pp=lb)  However  
> I wonder
> if that is enough to reduce the CPU usage or if I should just  
> reduce the
> capture size. If I need to reduce the size what would be a  
> reasonable size
> for PAL and how do I specify it (width=...;Height=... ? or what ?)

Deinterlacing won't reduce your CPU usage. It'll increase it. For the  
moment, your best option is to post-process the file. Capture it with  
a high quality, low resource codec (High-bitrate MPEG-2, some  
configurations of MJPEG, DV/DVpro through libDV (though that isn't  
perfect), feel free to experiment with them) and then go over it  
again with a good deinterlacing filter (there's a whole long thread  
devoted to which deinterlacer was the best, somewhere in the mailing  
list archives) and compress it.

Either that, or drop your capture resolution. 320x240 usually does a  
bit better. Depending on your application, a hardware encoder, like  
the Hauppauge PVR-150 might be worth the investment for you.

>
> Thanx
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