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dvcpro hd – very confused
– I’m trying to understand this —
the dvcpro HD clips I captured in FCP show up in QT at 1280 x 720 (both their current and actual sizes are 1280 x 720) I thought they were getting captured at 960×720. Is this the way it’s suppsoed to be?
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13 Replies
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It’s recorded on to tape from the camera CCD and captured on disk (from tape) to 960×720 if you use the DVCPRO HD codec. Quicktime does the anamorphic scaling to bring it up to 1280×720 when you watch them in FCP or even through Quicktime Player. 1280×720 is the proper frame size of the HD spec. If you capture uncompressed (from tape) the file will truly be 1280×720.
Does this help?
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well, okay – I think Apple must’ve changed something in the way DVCPRO is being handled.
When I open my dvcpro clips in QT – the current size and the normal size are set to “1280 x 720” at least I would expect one of them to be at “960×720”
I used to export clips from the media manager and they would display in QT at 960 x 720 – now when I export clips from media manager, everything is displayed 1280×720 – like some magic thing happened. Could be a software I updated at some point, but this is very strange. Right now, all seem to indicate that my footage has been captured at a true 1280 x 720 and not 960 x 720 with an anamorphic flag.
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[maxpower] “Right now, all seem to indicate that my footage has been captured at a true 1280 x 720 and not 960 x 720 with an anamorphic flag.”
Unless you changed the DVCPro HD capture settings, it’s 920×720. All DVCPro HD Easy Setups will show you 960×720 as the capture size.
I’m working with DVCPro HD all day, almost every day and it’s 960×720 unless I capture from the deck via HD-SDI at 8bit uncompressed.
Walter Biscardi, Jr.
https://www.biscardicreative.comDirector, “The Rough Cut”
https://www.theroughcutmovie.comNow Posting “Good Eats” in HD for the Food Network
“I reject your reality and substitute my own!” – Adam Savage, Mythbusters
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[walter biscardi] “it’s 920×720”
sorry, 960×720
Walter Biscardi, Jr.
https://www.biscardicreative.comDirector, “The Rough Cut”
https://www.theroughcutmovie.comNow Posting “Good Eats” in HD for the Food Network
“I reject your reality and substitute my own!” – Adam Savage, Mythbusters
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When I import the captured footage in FCP, fcp says it’s 960 x 720 – but when I open the footage in QT, it opens at 1280×720 – there’s no mention anywhere in the “info” that it it 960 x 720 – if I import it in After-effects its still 1280×720. I used the correct presets when I captured (the one I found on Ken Stone) — Whn you open your captured clips in QT, how do they show up? What’s the QT info box saying about the format?
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From QT info window:
Format: DVCPRO HD 720p60, 1280×720, Millions
FPS: 23.98
Normal & Current Sizes: 1280×720
Captured over firewire with a 1200A using 720p24 easy setup.
What problems are you having? I like to help.
Jeremy
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G5 Dual 2Ghz <> 4GB RAM <> FCP 5.04 <> Kona 2
ATTO 42XS <> Huge Systems 4105 Fibre
OS 10.4.2 <> QT 7.0.3 -
QuickTime’s just learned to recognize anamorphic flag in DVCPRO-HD 🙂 Hopefully DV and MPEG2 will follow shortly. “Normal” isn’t “True”. It is just the tag telling player at what size to play.
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Okay. That’s what I have too.
This is why I started asking questions:
Back in december, I used FCP media manager to export clips from a DVCPRO HD sequence. The clips exported were 960 x 720. I mean literally, even in QT.
I repoened the same scene file I used in December (exact same settings) and I exported the same clips using media manager and now the exported clips are 1280 x 720. (QT says 1280×720 FCP says they’re 960×720)
My only guess is that maybe I was using Final Cut 5.0.2 or 5 in December and they corrected the issue in 5.0.4 —
Anybody else had this problem?
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hm, well, that QT update just gave me a headache. good to know. thanks.
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Not this specific problem but; I wrote some movs out of combustion using the DVCPro 720 60p codec, but set the frame size at 1024×768 as the clips were intended for use in a Keynote presentation. They played beautifully on the targeted hardware in QT and in Keynote, until I added transitions to the presentation.
During a dissolve the head frames of the mov appeared to be at half resolution, when the transition finished the resolution would “pop” to correct. Not the desired effect. Also strange, monochrome movs did not have this issue. On a hunch, I opened one of these movs in QT Pro and changed the dimensions of the video track from 1024×768 to 960×720. When re-imported into Keynote the transitions looked fine.
All of which is to say, I don’t think QT should let an app write a file at a resolution QT and/or the codec and/or Core Image cannot handle. Also, shouldn’t QT Get Info display an “anamorphic” flag for video tracks that are?
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