de-Interlace or not during conversion ?

[eskimojan]

Hi all !

- I have captured (DV), encoded (TMPEGEnc), authored (SpruceUP) and burned (Nero 5.5) 5 DVD+RW's now, which looks awesome on my TV, but looks like crap on my monitor.
I have not encountered the same problem with any Hollywood produced DVD's. What are they doing, so that you get the same quality on both standard TV's and standard computer Monitors ? Are the contents of the Hollywood produced DVD's de-interlaced ?

Thanks in advance

[liquid217]

yes, deinterlacing will take care of that problem, but you could run into quality issues is you do that. I would recommend that you enable deinterlace in the dvd software that you are using. I use powerdvd myself, and there is an option in there to deinterlace as it plays. That way you don't risk hurting your picture quality by deinterlacing before you encode (never a good idea)

[eskimojan]

TMPEGEnc has the option of de-Interlacing during conversion to MPEG2. How would / does that hurt the quality ?

[liquid217]

because depending on the deinterlace method, your removing an entire field of data, the result, you can have a ghosting effect. Deinterlacing, by definition, is combining the two field data from an interlace souce and making it one frame. Essentually interlace data can be thought of as running at 60fps, when you deinterlace, your combining some of the data which can result in picture degradation.
http://www.lukesvideo.com/interlacing.html

this can explain interlace for you a whole lot better

As i said, your best solution is to deinterlace in the dvd playing software, that way you do not tamper with the original data

[liquid217]

oh by the way, let me add to this. Hollywood use "film" to record movies, they do not use video. Film is allready "progressive", meaning that in one frame, there is only one image, not two as with interlace. When you watch a hollywood dvd on your pc, it is progressive, meaning you will not see any interlace artifacts. They make progressive dv cameras, but they are a lot more expensive than regular interlace dv cameras