Bill Russell
Forum Replies Created
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Thank you, Shane!
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Hi, thank you, Jeremy.
To answer your questions, this client’s documentary was edited all this past year as offline using DVCAM downconverts of HD tapes. They recently did these many varicam pick-up effects shots and have consulted me, so we are trying to figure out how to get them downconverts that match the HD masters… that I actually will be onlining myself at another facility. I’ve never worked with DVCPro HD before so it is all confusing to me. Sigh.
What I think I understand is two things now: 1. DVCPro HD always downconverts one HD frame to one SD field. 2. When you capture in final cut you specify the frame rate you shot at (or otherwise it detects the frame “flags”), and all the other duplicate frames that make the remainder of 60 are thrown away… so if you say you shot at 48, FCP FRC gives you a 48fps clip running at a 48fps normal speed (by discarding 12 redundant frames). I got that right? Then you manually create the motion effect in 24p by slowing down the footage.
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Thank you, Shane, that really helps. Am I understanding correctly then that DVCPro HD only and always downconverts one HD frame (60th) down to two SD fields? If so, then I understand all this.
Yeah, client is offline editing using DVCAM, and I will be onlining from the HD masters. I would love it if offline matched.
One last question based on your advice. If one captures said DVCPro footage in FCP, one captures specifying 48fps and then later slows it in the sequence to 24 for the motion effect?
Sorry about all these questions — I’ve never worked with this vari HD format before.
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Hmm, okay, let me ask it this why then. Why does the a DVCAM Pro HD deck know how to play out for downconvert something recorded at 24p (it simply creates 24pA mode 30i frames), but doesn’t not know how to downconvert for something recorded in 48? Is it because it just blindly transfers each HD frame to an SD field regardless of what rate it recorded at?
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Hi Tony, thank you.
“If you desire the actual slo-mo effect then you must use the FRC … you can use the-plug in for FCP”
You can use the plug-in on media from the DVCAM downconvert? Is that really right?
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Hi, maybe someone familiar with this bug has a more specific answer, but I would delete any remaining render files now if you did not get them all. I’ve had render file linking problems in the past, and all the disk file changes you made recently could have messed up FCP linking, and may have messed with the filesystem a bit too.
Delete the render folders (for these timelines) living anywhere on all your disks. Then go into FCP’s render manager and delete any remaining render files. Then repair your disks. It is possible the RAID file system got a little wonky when you deleted all those files. Do you have Diskwarrior? Keep runing it until no more “red”, you get all “green”.
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Hello, thank you, Walter.
“When you try to convert to slo-mo on the fly during capture or transfer, you will not get all of the footage, you will only get about half of the footage actually transferred that you thought you were getting. It’s much better to pull the footage into a system at 59.94 and then convert it after it’s already in the system.”
Why? What is it doing? Or… Where is the “other half” of the footage going on a straight down-covert to DVCAM tape? Thanks!
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Hi, thank you for your help!
So if you don’t play through a hardware frame-rate convertor, then what do you end up with on the DVCAM downconvert?
All 60 frames as all sixty fields, some of those fields repeats because it shot only 48 unique images per 60 frames?
Are the straight DVCAM downconverts (without going through a frame rate coverter) therefore useless for offline editing?
“THE LOST SKELETON OF CADAVRA” –
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Hmm, make sure your output is 720×480 (the size for DV) and not 720×486 (the size for uncompressed). The lines of of the fields must match up exactly. And I assume your DV project is 29.97 (and not 23.976)? Anyway, if all three versions jittery, sounds like perhaps a frame rate mis-match. Check that on your lightwave project.
“THE LOST SKELETON OF CADAVRA” –
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I assume the HD 24p is actually 23.976. You can nest the HD sequence into a DV 23.98 Anamorphic sequence. FCP 5 will add a pulldown when playing to tape, so you do not need to convert to 29.97.
Likewise, you can author a DVD with 23.98 Anamorphic material, and it will play out correctly from the DVD. You just need to make sure your settings when authoring specify anamorphic wide screen media (so that the DVD player “knows” to add a letterbox to SD aspect display) and the frame rate (so the DVD spits out pulldown on output). You can send the HD directly to Compressor and use a DVD preset. Give yourself some time. There ya go!
“THE LOST SKELETON OF CADAVRA” –