To deinterlace or not to deinterlace

[Mike]

Archived from groups: rec.video.desktop (More info?)

Hello.
I've not really got my head round this deinterlace thing. I know it makes a
film look good either on a monitor or a television.
Basically I've taken a series of home videos and I'm going to put them onto
a DVD to be viewed mainly on television rather than computer screens. I'm
using Premiere to edit the films, can someone recommend what setting I
should use in the settings of the 'Export Movie' window? Whether to check
the 'deinterlace video footage' option, or to leave it as it is?
I've tried both setting and viewed the results on both a monitor and TV and
to be honest I can't really notice much of a difference. The 'deinterlaced'
version doesn't have the horizontal lines on the TV when subjects move
quickly, but it is slightly less defined. Does anyone know what the general
rule is with the deinterlacing option?
Thanks.

 

[Guest]

Archived from groups: rec.video.desktop (More info?)

Mike wrote:

> quickly, but it is slightly less defined. Does anyone know what the general
> rule is with the deinterlacing option?


If your original material is interlaced, and your target is a
television, then leave it interlaced.


-WD

 

[Guest]

Archived from groups: rec.video.desktop (More info?)

<posted & mailed>

Mike wrote:

> Hello.
> I've not really got my head round this deinterlace thing. I know it makes
> a film look good either on a monitor or a television.

Interlacing will look better on displays that are interlaced (television),
and deinterlaced video will generally look a little better (depending on
the source and the deinterlacing method used) on non-interlaced displays
(computer monitors). You might assume that deinterlaced video would look
better on progressive-scan televisions and DVD players -- but that turns
out frequently not to be the case (unless using DVI, chances are that all
signals are routed through a hardware deinterlacer on the set).


> Basically I've taken a series of home videos and I'm going to put them
> onto a DVD to be viewed mainly on television rather than computer screens.
> I'm using Premiere to edit the films, can someone recommend what setting I
> should use in the settings of the 'Export Movie' window? Whether to check
> the 'deinterlace video footage' option, or to leave it as it is?

Don't bother deinterlacing. It will degrade the output for normal TV
slightly, take more CPU cycles to perform, and not buy you much for
non-interlaced displays.


> I've tried both setting and viewed the results on both a monitor and TV
> and to be honest I can't really notice much of a difference. The
> 'deinterlaced' version doesn't have the horizontal lines on the TV when
> subjects move quickly, but it is slightly less defined. Does anyone know
> what the general rule is with the deinterlacing option?

If you see horizontal lines on the TV, then the frame order on the DVD is
probably wrong. If you see them on the computer monitor but not the TV,
then change the player you are using.

> Thanks.

--
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[Guest]

Archived from groups: rec.video.desktop (More info?)

Mike wrote:

> I've taken a series of home videos and I'm going to put them
> onto a DVD [...] The 'deinterlaced' version doesn't have the
> horizontal lines on the TV when subjects move quickly,

If you see "horizontal lines" on the TV when you watch your
DVD, but do _not_ see them on the original home video (from
which the material was captured for the DVD), you probably
have a problem with field order in your "production chain".

--
znark