Horizontal Lines In Exported Movie

Sounds like normal interlacing:

http://www.sjoki.uta.fi/~shmhav/SVCDon_aMacintosh.html#interlacing

Matti,

in addition to your excellent article, I allow me to add a wiki link
http://en.wikipedia.org/wiki/Interlace

.. which, you guessed it, illustrates with 'blinking' images ⚠ interlace...

;))


Rondos, this is based on some internal joke between Matti & me, about usage of pic/videos on websites.. 😉

...the very first link of my text referred to that wiki page 😉

Guten Morgen!

.. ...the very first link of my text referred to that wiki page..

ooops 😟, missed that...

you should 'mark' it with a flashing red arrow... som'thin' ..... ;))

You received a good explanation as to what the problem is (interlacing). Now about solving it... What format are you exporting too? If you choose Quicktime -> Expert Settings -> Options -> Size, you will find a checkbox for "Deinterlace Source Video". Turn it on to eliminate the jagged lines.

.. in case, you like to use iDVD, you souldn't export at all, nor should you interlace your iM...

DVDs are meant for TV delivery.. TV uses interlace..

simply store your project in the 'Movies' folder; iDVD will find it there and offers it under 'media'

remember: iM/iDVD are meant for TV delivery, a computer offers just a lowered-playback quality.. final quality can only be judged on TV...

DVDs are meant for TV delivery.. TV uses interlace..

And any decent DVD player application should default to or offer an option for deinterlaced playback.

Usually the apps hide all these complex video issues from the user but sometimes they raise their ugly head (interlacing, overscanning, low resolution, color glitches, video standards, aspect ratios, pixel dimensions, codecs etc) and the user might think something is seriously wrong when, infact, everything is OK.

.. And any decent DVD player application should default to or offer an option for deinterlaced playback...

http://www.apple.com/feedback/dvdplayer.html


okay, okay, just kiddin' !!!

The DVP Player.app defaults to deinterlaced playback so IMO it behaves OK.

To summarize:

When you work on a movie for delivery as a DVD, don't de-interlace (there is no such option in that process anyway). Standard video DVDs contain interlaced video, and both the software and hardware players deal with it properly.

When you export your movie for displaying on a computer screen, de-interlace during the export. The option is available in Share -> Quicktime -> Expert Settings -> Options -> Size. This avoids jagged edges during playback, as many players don't automatically de-interlace during playback.

And finally, for best results, export in DV format for iMovie, then de-interlace with an application like MPEG Streamclip or JES Deinterlacer. In my opinion, these applications do a slighty better job.