Re: [dvd::rip] a few questions about encoding

Kurt Forsberg wrote:

> On Dec 28, 2007 1:04 AM, Mate SOOS <soos@xxxxxxxxxxxx> wrote:
>
> <a freaking essay>
>
> Mate gave a solution to the problem without actually revealing the
> cause.  I hate it when people do that.
>
> Horizontal lines are caused by interlacing.
The original problem was not one about horizontal lines (where did you
read that?). It was the problem of bad resizing of image before encoding
(thus blocky resulting encoded video). Interlacing had nothing to do
with it. Just for fun, try encoding with fast resize, with or without
smart deinterlacing (it does not matter), and have a look at the result.
Then write back.

>   Turn on deinterlacing
> (smart deinterlacing works fine) and they will go away.  The reason
> this option is not enabled by default is because most DVDs are not
> interlaced.  If you enable this option on a non-interlaced DVD, you'll
> just slow down transcoding for no reason.
Not true. Smart deinterlacing will only deinterlace if the original
content is interlaced. The only time you loose is the time it takes for
the algorithm to decide if a given frame is interlaced, which should be
straightforward (i.e. fast), therefore the loss is minimal.

>> ...I can hardly think that most people
>> who use dvd::rip have a spare computer just to do ripping...
>>     
>  Well, that's a bit presumptuous.  I'm sure quite a few people have
> more than one spare computer, or at least computers that spend most of
> their time idle (ie. nfs server), hence transcode cluster capability

Wow, interesting argument. I will do a little questionnaire in my
workplace, which is full of computer science people. I bet that even
amongst them the percentage of spare computer ownership is lower than
30%. Note that I am not saying that they don't have an old Commodore 64
( <- joke ) in the basement, I mean that they don't have it up and running.

Cheers,

Mate