[vlc-devel] In deinterlacing this week: odds and ends
kaarlo.raiha at gmail.com
Fri Apr 8 09:39:29 CEST 2011
2011/4/8 Juha Jeronen <juha.jeronen at jyu.fi>
> Hi all,
> 1) "Mean" and "Blend" are confusing labels. I had to read the source
> code of both to find the difference. :)
> Should we consider these user labels stuck for historical reasons, or
> could they be renamed in 1.2 to "Blend (half res.)" and "Blend (full
> res.)" or something similar? What do you guys think?
Terms "Mean" and "Blend" are used in many video processing programs (I don't
say they are correct ones, just that they are used a lot). It might causes
some confusion in certain usergroups if "Mean" is renamed (would we keep
same shortname for it after rename?).
> (This would make the choice easier for new users without reading the
> docs. It shouldn't hurt existing users (much?), if the internal names
> are kept as-is.)
> 2) I was surprised to discover that Linear interpolates 4:2:0 chroma,
> handling it as if it was the luma. This may or may not be the Right
> Thing, depending on the input. As I'm not yet sure as to what to think
> about this, it's not mentioned in the doc draft.
> 3) After writing the summary table in the doc draft, including X (2x)
> (which I plan to suggest for merging later), I noticed that now Linear
> is the odd one out, as it's missing a 1x mode...
> However, that wouldn't work much better than Discard, so probably no one
> would want to use it, unlike X (2x) which can be useful. Maybe I'll try
> to resist the temptation to make everything symmetric ;)
> On the other hand, we *do* have Discard, and if everything (or
> very-almost-everything) came with a 2x mode, it would make the selection
> more intuitive. So maybe I should, after all...?
> On the third hand, it would add one more choice.
> On the fourth hand... oh, well.
> (Myself, I was puzzled by the menu entry "Yadif (2x)" back when I hadn't
> read the source code.)
> That's all for now,
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