Please Help- Horizontal Lines Look Nasty--!

sonic freak

sonic freak

New member
i shot a project in 24p regular, letterbox in camera, and the footage looks great. But in FCP there are nasty horizontal lines all over my footage when stuff moves. And when i exported to quicktime, the lines are there and it looks crappy.

the strange thing is, I can make the lines go away in the canvas or viewer by viewing it at 50% or 200%, in fact, any setting that is not 100%. How strange is that? What's going on and how do I make those lines go away!?

Any help is appreciated, must export this project today....


-Murf
 
Last edited:
sonic, you should really post a screen grab of what your talking about.

thats the one thing i never understand about this section. So many talk about their problems yet so few actually give us a visual demonstration.

got time to post some?
 
yes. and thanks for responding. i just directed it. i hired an editor, and he doesn't know what it is. i've never posted a grab. seen people do a thousand times in here. do you just make a freeze frame in FCP and then upload it?
 
Last edited:
in FCP, assuming its similar to PP1.5 ( which im probably way wrong ) I just go to file, export, frame.

Set the aspect ratio, then i upload it to www.imageshack.us

when you want to post it on a forum, just add
 
john,

do you mean click on the 'deinterlace source video' box in the export SIZE settings when i'm exporting? or is there another place to deinterlace. (that's a cool rhyme)i tried it there and it didn't work.

thanks for responding.

1158259186.jpg


yeah, my first screen grab!
so there are the ugly lines..
 
john,

so we screwed up the pulldown? i'm not an editor. a director. i hired an editor for this project as a favor for a pro golfer friend. and i'm supposed to deliver the DVD today. i'm screwed cause I can't read that page and understand how i screwed up.

papa,

any thoughts?
 
Last edited:
oh shit, ive had this happen to me. and yes, on a DVD that i sold to parents

but it only happened for the first 3 minutes, and i think this was due to eithre a timecode break, or diff capture rate/scenesettings at the VERY beginning of what i was capturing. I tried going back and recapturing it agian but this time i gave it a few more seconds in and the problem didnt happen again.

but this could all be luck tho.
 
If you shot in 24p it should have done the pulldown for you. I am not an FCP guru obviously (Vegas baby) but your project should be a 24p project, right ?

What did the editor do ?

Did he return this to you with all that nasty inerlace non-sense? Is it rendered out and complete ?
 
If you are planning to edit in 24p (especially in FCP), you should shoot 24pA.

Since you're in FCP, you need to use Cinema Tools to remove the pulldown from your 24p standard footage. FCP can remove advanced pulldown, but you need that extra step for 24p standard.

DO NOT deinterlace it. The results will be worse, only in different ways that you don't want.

Or, just edit as 60i (29.97). But as it's an interlaced format, you will still see the interlace artifacts (those lines). This isn't a problem if it's going to be watched on an interlaced TV.
 
Guys. I think what is happening to him happend to me.

i might not be explaining properly but i shot in 24Pa, then whe ni went to capture it and play it back in a 24p timeline, i had the same result. But i went back, re captured, and hte problem went away.

I remember very specifically there being a strange dropped frame at the very begininng of my capturing which could have disabled the pulldown while the rest of the footage required it leaving these lines?

Make any sense? What else could be the explanation, cant think of anything else.
 
to everybody, thanks for the input.

DJ, i did deinterlace it. why did you say it would be worse? those horrible lines are gone. now it looks great.

again, i'm not an editor, so i wouldn't know a 29.97 timeline from a wolly mammoth's ass.

but a friend came over and he fixed it in seconds. he just applied the deinterlace video filter to all of the clips. That solved it.

The deinterlacer is inside the video filter, which sits in the EFFECTS bin in FCP.

stoked. now i can move on!

for today...
 
ATTENTION MODS!

lol

not trying to steal the thread, but if you've been following what i've written so far, tell me why this happens? :

As i mentioned before, i shot in 24pa, uploaded it and noticed that there were these interlaced lines. HOWEVER, they only came up every 4 frames.

Interlaced lines every 4 frames? What gives? Why would this happen?

If i deinterlaced it, the motion would be similar to around 12 fps, very choppy, strobby on pans and movement.

now, this was the one and only time it happened, but i would LOVE to understand why.
 
If you simply deinterlace 24p footage, you're throwing away half the resolution. And, depending on the footage and the deinterlacer, you could be interpolating between mismatched frames. The correct thing to do is to remove the pulldown and restore the full-resolution 24p frames.

Now, it's true that DV is low-resolution anyway, but you'll see a difference in resolution if you were view it side-by-side with proper progressive footage, especially on moving objects.

Also, depending on the method used for deinterlacing, you can end up with choppy motion such as that PaPa is describing. The reason is that the deinterlacer is performing its function based on a framerate other than 24p and as such is interpolating fields according to a different motion cadence than what the footage actually has.

Results vary, of course.

PaPa, what you're seeing is the "judder" frame in 24pA. if you take 24pA footage and don't remove the pulldown, only one frame in 5 will have an interlace artifact, because only that middle frame is composed of fields from two different progressive frames.

If you were to similarly examine 24p (standard) footage, you'll see two frames right together with the interlace artifacting.
 
PaPa, what you're seeing is the "judder" frame in 24pA. if you take 24pA footage and don't remove the pulldown, only one frame in 5 will have an interlace artifact, because only that middle frame is composed of fields from two different progressive frames.


so howcome this happened with that certain upload. Could the broken timecode or frame drop have made the capture think it was record in another format than 24p?
 
Maybe.

Actually, now that I think about it . . .

You're working in FCP? You set it to remove pulldown during capture? You're not talking about capturing 24pA without removing pulldown?

Could be that something (timecode break? Dunno) cause the A frame to be misidentified and so when pulldown was removed, it started in the wrong place. This *would* result in every fourth frame being mismatched.
 
You must log in or register to reply here.
Back
Top