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De-interlacing video pulled from DVD before placing in FCP timeline.
Greetings! First post here.
I have a question that might seem basic, so apologies beforehand. I have searched quite a bit for a related topic in this forum and others but nothing has come up.
I am am pulling material from a few DVD sources. These are not “pirated” videos but copies of indy films given to me for being an actor in them. I have editing experience with FCP by editing from footage I shot for a short film (and from college), and am currently using FCP for a demo reel project, but I have not had much experience pulling material from a DVD. What I have figured out so far is that by using Cinematize 2 Pro I can either pull clips in MPEG-2 streams or have Cinematize encode the clips in the Apple ProRes codec (which I am using) or other codecs. If I pull the MPEG-2 then I just use MPEG Streamclip to convert to the necessary editing codec. I know for a fact that one of the films is interlaced, because I see the “comb” effect during playback in Quicktime. Some others I am not completely sure. The comb effect is annoying but I can de-interlace the clip in Streamclip.
Knowing that MPEG-2 needs to be interlaced for DVDs is it better to leave the currently interlaced footage alone, and put up with the artifacts on my computer monitor, or should I de-interlace anyways? I am curious if de-interlacing, then interlacing again for the new demo reel DVD will cause double quality loss (on top of the loss by editing from DVD source).
Thanks in advance for any helpful advice,
Jeff -
20 Replies
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[Jeff Weisinger] “is it better to leave the currently interlaced footage alone, and put up with the artifacts on my computer monitor, or should I de-interlace anyways? I am curious if de-interlacing, then interlacing again for the new demo reel DVD will cause double quality loss (on top of the loss by editing from DVD source).”
Jeff,
Leave it alone and just keep editing. Your thinking on this is essentially correct.
David
David Roth Weiss
Director/Editor
David Weiss Productions, Inc.
Los AngelesPOST-PRODUCTION WITHOUT THE USUAL INSANITY ™
A forum host of Creative COW’s Apple Final Cut Pro, Business & Marketing, and Indie Film & Documentary forums.
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[Jeff Weisinger] “Knowing that MPEG-2 needs to be interlaced for DVDs”
Not at all. Most DVD players can not read Progressive. Normally progressive stuff is read as interlaced, but as long as there are no movement between the two fields, keeps looking progressive.
Progressive material can be readed as interlaced and nobody will notice it. Interlaced material have to be read as interlaced and with the proper field order.
You can put all your stuff in an interlaced sequence and everything (including the progressive clips) will look OK.
rafael -
The VAST majority of DVDs now are actually 23.98 progressive.
Sean
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[Sean ONeil] “The VAST majority of DVDs now are actually 23.98 progressive”
The bast majority of DVDs are Hollywood films, so the source is progressive. Progressive or interlaced encoded, the bast majority are played in interlaced DVD players and watch in in interlaced TVs through a standard PAL or NTSC video signal (interlaced). Picture keeps looking progressive.
Rafael -
[Sean ONeil] “The VAST majority of DVDs now are actually 23.98 progressive.”
Since when? The vast majority of DVD’s produced in the U.S. are 29.97. Source might start out as 23.98 from a film, but the end DVD is 29.97.
Walter Biscardi, Jr.
Biscardi Creative Media
HD and SD Production for Broadcast and Independent Productions.STOP STARING AND START GRADING WITH APPLE COLOR Apple Color Training DVD available now!
Read my Blog!
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I regularly convert DVD source VOBs to a editable codec with MPEG Streamclip which has a very good deinterlacer and rescaler. Here’s the web page where you can download it:
and it’s free as in beer or speech.
cheers
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Thanks for posting that link!
-LF -
[Sean ONeil] “The VAST majority of DVDs now are actually 23.98 progressive.”
[walter biscardi] “Since when? The vast majority of DVD’s produced in the U.S. are 29.97. Source might start out as 23.98 from a film, but the end DVD is 29.97.”
Hold on a minute fellas, this is one of rare those cases where everyone is correct. Progressive-source video (such as from film) is usually encoded on DVD as interlaced field pairs that can be reinterleaved by a progressive player to recreate the original progressive video. So, in effect, while technically DVDs are do in fact contain interlaced video at 29.97, those properly encoded from progressive material are flagged to deinterlace and display using the internal deinterlacing chip found in most progressive DVD players.
David Roth Weiss
Director/Editor
David Weiss Productions, Inc.
Los AngelesPOST-PRODUCTION WITHOUT THE USUAL INSANITY ™
A forum host of Creative COW’s Apple Final Cut Pro, Business & Marketing, and Indie Film & Documentary forums.
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[David Roth Weiss] “Hold on a minute fellas, this is one of rare those cases where everyone is correct. Progressive-source video (such as from film) is usually encoded on DVD as interlaced field pairs that can be reinterleaved by a progressive player to recreate the original progressive video.”
Nope. You guys are both wrong. It’s a 23.98 progressive scan MPEG-2 on all major studio DVD releases.
A DVD player will add pulldown on output during regular NTSC playback. But the encoded video is 23.98 progressive. No if ands or buts about it.
I just ripped 40 DVDs to do a spec promo fro Fox Home video. Every single one of them was progressive scan. But I’m mot basing my claims on this. It’s actually common knowledge that DVDs of movies are all encoded authored at 23.98 progressive.
Sean
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[Sean ONeil] “Nope. You guys are both wrong. It’s a 23.98 progressive scan MPEG-2 on all major studio DVD releases.
A DVD player will add pulldown on output during regular NTSC playback. But the encoded video is 23.98 progressive. No if ands or buts about it.”
Sean is absolutely correct in this.
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