On Mon Jul 25, 2005 at 05:42:06PM +0200, Sylvain wrote:
>
>
> Robin Hill wrote:
>
> On Mon Jul 25, 2005 at 10:58:32AM +1000, Sebastien Gerega wrote:
>
> 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.
>
> Hi
> The trouble is, encoding an interlaced movie will prevent the codec from
> giving
> good results, for while codecs are designed to analyse a picture as a whole
> and
> then compress it, they will have diffulties dealing with two "mixed"
> pictures.
> So the result won't be too good looking.
> please have a look at
> http://www.bunkus.org/dvdripping4linux/single/index.html#
> ripping_interlace
This depends entirely on the codec - xvid, for example, has an
interlaced mode in which case it will deal perfectly well with
interlaced video (better than deinterlaced I'd say, since the
deinterlaced image is not clean - the two interlaced frames are not at
the same time point so will not necessarily form smooth curves, blocks,
etc to encode).
Cheers,
Robin
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