[dvd::rip] Re: Deinterlacing

On Mon Jul 25, 2005 at 10:58:32AM +1000, Sebastien Gerega wrote:

> I am relatively new to DVD::Rip but have been extremely happy with the 
> support and package as a whole. However, I have several questions 
> especially in regard to deinterlacing. First of all I have some DVDs 
> that I watch on my laptop, which I have come to realise are interlaced. 
> This results in many horizontal lines, to the point of it being 
> difficult to watch, appearing in the picture when watching the DVDs in 
> linux. When I watch the movies in windows on the same laptop I do not 
> get this problem. What is the reason for this? Is there a way around 
> this problem?
> 
I'd guss that your Windows player is automatically doing the
deinterlacing whereas the Linux one isn't - check the parameters for
whatever app your using, there should be options for deinterlacing.

> Secondly, when ripping DVDs should one deinterlace the video? I have 
> tried doing this a couple times, and apart form deinterlacing 
> drastically increasing the transcoding time, I have not been completely 
> happy with the results. If I really should deinterlace, are there any 
> recommended filters I should apply?
>
From what I've read, I'd recommend to do as little irreversible change
during the ripping process as necessary.  Deinterlacing, subtitling, and
many other filters can be trivially applied during playback, allowing
them to be used only when needed.  Only if the change is too processor
intensive to be applied on playback or will be applied in any case (such
as clipping/resizing) or if you're encoding for playback on a specific
device would I recommend doing it at rip time.

HTH,
        Robin
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    ( ' }     |       Robin Hill        <robin@xxxxxxxxxxxxxxx> |
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