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Upper Field/Lower Field/Progressive/De-interlaced
Hello people,
First of all, please bear with me as I am a relative newcomer to video editing and DVD authoring.
Over the last few months I have been editing/compiling a video montage using many different video clips from many different sources. Most of these clips were originally AVI (Divx) files which I then converted into DV-AVI (NTSC) for editing in Premiere Pro. Some of these I converted using Windows Movie Maker (Gasp) but the majority were converted by importing AVISynth scripts (.avs files – Created with MeGui Media Encoder) into Premiere, exporting into DV-AVI (NTSC) format and then re-importing the newly created DV-AVI files.
Even though my project is made up entirely of NTSC DV-AVI files, I ultimately intend to author these into both NTSC and PAL format DVD’s for viewing at home on TV.
The thing that is really confusing me is the whole lower field/upper field/progressive/de-interlaced issue. I know that TV’s come in two main display methods – Progressive scan and interlaced, although I’m still yet to fully grasp how both of these work.
Are progressive scan TV’s able to play interlaced footage without combing?
Are interlaced TV’s able to play de-interlaced/progressive footage without any distortion?
How do I optimize settings for each format so that the finished DVD’s play properly on both progressive scan and interlaced TV’s?
Do the settings need to be different for PAL and NTSC?
Thanks in advance…
John
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3 Replies
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KISS. Just keep it interlaced, especially with your source material.
Harm Millaard
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DV is always lower field first NTSC and PAL…in interlace video, it’s a matter of which field “begins” a new frame…important for editing so the ‘cut’ lands in the right spot. Otherwise you get a frame with a field from one piece of content and a field from another…
Interlace should play back on most ‘progressive’ display type -televisions- as there is circuitry to handle the interlace properly, but it will likely comb when viewed on a computer…
You’ll have to author both a PAL and an NTSC version. I’d probably elect to export a master clip in whatever format is native to your edit and transcode that to the other standard, then MPEG2 compress each as the appropriate standard.
TimK,
Director, Consultant
Kolb Productions,CPO, Digieffects
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Export your NTSC timeline as NTSC AVI.
Use TMPGEnc DVD Author 3 ($90,- and free trial) to import the AVI file amd set output on PAL. Start render to PAL MPEG for the DVD.
Voila.Phocas Kroon
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