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Horizontal lines (jaggies) in NTSC captured footage
I have been editing Pal footage for several years without much problem, but have just got my first work with NTSC.
The captured NTSC footage in FCP has horizontal lines in movement on every line of resolution.
This is particularly noticable where there is lots of movement and high contrast. By the time the sequences have been encoded to Mpeg2 in compressor the lines have got much worse….and the client is complaining!The master tapes play back ok.
I am using a Dual 2 Ghz G5 with 3.5 Gig of RAM.
The footage is being imported from a DSR 11 DVCAM deck (set to NTSC) connected by firewire. I do not have a capture card.The footage is monitored on a JVC production monitor, not a computer screen, so I have a true picture of the video quality.
I am using Final Cut 6.0.4.
I have used the ‘easy set up’ as follows:
Sequence Preset: DV NTSC 48KHz
Capture Preset: DV NTSC 48KHz
Device control: Firewire NTSC
Playback output video: Apple firewire NTSC (720×480)I have searched the forums, but can’t quite nail the answer to this one. I have tried deinterlacing filters and shifting the fields with out success.
My work flow has been to capture the DVCAM footage in NTSC, edit it into a NTSC sequence and export it as a Quicktime using ‘Current Settings’.
I then import the QT into compressor where I have tried 2 pass variable bit rate at 7.4 average and 8.8 maximum. I have also tried a constant bit rate at 7.5. All yield the same issue with the jagged lines.Is this problem solvable?
I have never seen anything like it with pal footage, or is it an NTSC/Mpeg2 thing?Any help or input would obviously be greatly appreciated.
I have a picture I can email to anyone who may be able to help me.Many Thanks,
Colin Froud.Divercol Productions.
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3 Replies
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Hi
As another PAL editor, I edit NTSC from time to time using exactly the same set-up as you, except I use FCP 5.1.4 and a Sony PVM monitor.
I don’t recognise the problem you are describing – everything is fine for me.You must monitor on a proper NTSC video monitor to see the footage correctly – any sort of PAL60 or NTSC 4.43 monitoring can be compromised by all sorts of scaling artifacts.
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Hi Paul,
thankyou for your reply.
My broadcast monitor can switch between NTSC and Pal, so no issues there…and besides, the client in the US is seeing the same thing.It really is a head scratcher. The master tapes look fine, it is only on capture that the problem starts to become noticable, and once the footage is made into a Quicktime and reimported in FCP, then it becomes more obvious. Obviously by compressing it to Mpeg2, it then becomes really bad.
I have never had any issues with Pal.
If you are interested I can send you the pic if you let me have your email.Mine is info@divercol.co.uk
Many thanks,
Colin.
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Hi Colin did you ever figure out the horizontal lines issue? I seem to be having the same issue. I filmed my footage on a Canon T2i and T3i. converted the footage for editing purpose using Mpeg streamclip.
I’m concerned as i’m halfway through editing and now concerned that this will show up on the final edit.Please help
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