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Vibrating video issue –
I’m having an issue with vibrating NTSC video when moving from a legacy Media 100 System to Final Cut. Shots with camera movement – especially pans – vibrates when it’s brought into FCP. De-interlacing and use of the flicker filter in FCP seems to help some (but softens the image) and I’m not sure that’s getting at the source of the problem. So I’m wondering if someone with more tech savvy than I have can straighten me out.
Here’s the work flow:
Video is shot on a Sony DSR 300 (DVCAM) and imported directly into Media 100i (v 7.5) via analog (component) inputs at 720×486. The Media 100i is running on a G3 with OS 9.2. I noticed the installed transcoder is JPEG Motion B for Media 100.
Video is edited on this system and exported as a self-contained video.
The self-contained video is dropped directly into Final Cut Pro 6.04, which says the clip “… does not match this sequence’s settings or any of your sequence presets… Change sequence to match clip settings?”
I dutifully answer YES – and the clip goes in and plays without the need to render – These are the sequence settings:
Everything looks fine until I get to camera motion. Then – the video seems to vibrate back and forth. It becomes most notable when I run it through Compressor and create a DVD, then play it back on a conventional monitor.
Here are some things I’ve noticed that might be clues:
• If I export the FCP and bring it back into the Media 100 system – the video looks just fine, with only the slight degradation you might expect attributable to a generational loss.
• M100 video the FCP timeline appears with a noticeable black line around the top, right and bottom screen edges.
• De-interlacing using a 2 video channel method with 50% opacity on V2 and de-interlacing filters set to Lower on V1 and Upper on V2 helps somewhat, but softens image sharpness. Flicker filter is also used at max settings. Not sure whether that’s helping or not.
ANY HELP would be appreciated…
Thanks!
Dennis Dean
The Dean Group
-It’s about results-
http://www.deangroup.com -
10 Replies
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Maybe Walter, or some other former Media100 user can confirm, but wasn’t the older M100 stuff 640 x 480 upper field first…if so your field order might be getting reversed…that would explain the motion artifacts and the slightly undersized video.
You might want to try converting this stuff to 8 Bit Uncompressed or Pro Res using Compressor (Advanced Format Conversions).
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[John Pale] “Maybe Walter, or some other former Media100 user can confirm, but wasn’t the older M100 stuff 640 x 480 upper field first…if so your field order might be getting reversed…that would explain the motion artifacts and the slightly undersized video. “
It was definitely 640×480 but I have no memory of the field order.
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!
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Double click the clip and look in the filter tab.
Did FCP automatically add the Shift Fields filter. If yes, remove it, and try playing it back.
If not…add it and try playing it back.Does that change how it looks?
Anyway….if you convert the footage in Compressor, you can resize it to properly fill the frame and correct the field order (if that is actually the problem). That’s what I would do…getting out of that legacy codec would be the best thing.
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It depends what board you had. The P6000 was 720×486 NTSC is lower field (Even) dominant.
The earlier Vincent Board was 640×480 but they had a 720 enabler– mileage varied with that.
I brought stuff into FCP hooking up SDI out from the media 100 breakout box to the Kona 3 Kbox and it looks and plays fine.
Warren
Warren Eig
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We ended up doing the same thing. Hooking up the M100 to our AJA box and capturing the footage. P6000 card.
Dajen Productions, Santa Barbara, CA
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I’ll double-check to see if FCP automatically added the shift field feature… but I don’t think so. The sequence setting says lower field after the clip has been added.
The video is 720×486 lower field dominant. Dale is correct. The old M100 was 640×480. Upper field dominant. I can run either on the P6000 board – so I run 720×486 – lower.
John’s idea – You might want to try converting this stuff to 8 Bit Uncompressed or Pro Res using Compressor (Advanced Format Conversions).
is interesting. I’ll give that a try also.Any other thoughts appreciated – thanks for the ideas !
Dennis
Dennis Dean
The Dean Group
-It’s about results-
http://www.deangroup.com -
Well, everything you mention sounds exactly like the fields are reversed. Have you tried interpreting the footage as upper field first? What happens?
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I’m traveling and reading this but will try reversing the fields to see what happens. Got to get to bottom of this. Thanks
Dennis Dean
The Dean Group
-It’s about results-
http://www.deangroup.com -
Bret – are you thinking reverse the fields as soon as I bring this into Final Cut?
(seems the only way to do it but I’m no expert in this area) -thanks-
Dennis Dean
The Dean Group
-It’s about results-
http://www.deangroup.com -
Dennis, I said this before, but it might have gotten lost in the thread…
FCP guesses the field order of your footage, but sometimes gets it wrong…not totally surprising with an old legacy codec like yours.
Check to see whether FCP has automatically place a “Shift Fields” filter on your clips. If so, try removing it and see if it helps. if it hasn’t try adding it to one of your clips and see if it helps.
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