Carsten Orlt
Forum Replies Created
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[Jeremy Garchow] “[Carsten Orlt] “But this doesn’t really matter BECAUSE once you shot your footage progressive putting it into a interlace sequence doesn’t change it.”
Except if you put a clip that’s marked as ‘Upper Field First’ into a progressive timeline, it will look crappy. The field doms of the clips and timeline must match name wise, otherwise FCP interprets them wrong. “
It only is a problem if your clip is opposite to your seq. but I have progressive footage as upper field and the seq as upper field or none and both look just fine.
[Jeremy Garchow] “[Carsten Orlt] “So putting a progressive clip into a interlace seq doesn’t make it interlace.”
No it doesn’t, but anything you add to it, such as motion or filters will render interlace as that’s what the timeline is set up for, so it does matter what your footage and timeline field dom is set for in FCP.
“Correct but in practical terms it only shows in anything effecting time. if you do CC on a progressive clip in a interlace timeline the result is still progressive or I guess i should say PSF.
Carsten
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Bill
To clarify first:
When shooting:
Progressive shooting means all video lines are captured at the same instance in time, in your case every 1/30 of a second (ignore the 29.97 for now)
Interlace means that first the odd lines (1/3/5…) and then the even lines (2/4/6…) are captured. This happpens every 1/60 (fields as oppose to frames) of a second effectively creating a full frame every 1/30. So if you shoot interlace and display one frame of your 30 showing all lines there is a difference in time between the alternating lines. Think of a ball traveling from left to right through the picture. When shooting progressive you will have 30 pictures with all lines showing the ball. When you shoot interlaced you will take a ‘half-resolution’ frame every 1/60 of a second so a full frame will have a slightly different position of the ball between the odd lines and the even lines (1/60 later).
When editing
AJA doesn’t give you any 1080p settings for now (I think it’ll change soonish) because in the Broadcast world 1080p as a delivery format is virtually not in use (I don’t know of any Broadcaster that uses it).
But this doesn’t really matter BECAUSE once you shot your footage progressive putting it into a interlace sequence doesn’t change it. You have 30 complete frames. At the receiving end will be no difference if I send these frames 30 times per second complete or if I split them into odd and even lines and send those at double the freq of 1/60.
So putting a progressive clip into a interlace seq doesn’t make it interlace. To make things clear the techo therefor created the term PSF=progressive segmented frame to be able to tell somebody that the video was shot progressive but is transmitted using the interlace method.
So hard cutting progressive footage in an interlace seq doesn’t change the footage. What does change it is anything effecting speed. Because FCP creates new frames by combining fields you could end up taking the odd lines from 1 progressive frame and the even lines from the next progressive frame creating a new frame that is now interlaced (2 instances in time in one frame). You might think this is bad but I actually think its good 🙂 Because the end user (anybody watching it on a TV) wants a smooth slo mo and they will appreciate you using more time information from your source footage. (This is the reason I wouldn’t change the field settings from what FCP uses by default. If you for whatever reason want to avoid any interlace frames in your final seq e.g. for film prints you should use the none setting for both footage and seq as Jeremy said)So my conclusion to your problem is that the buzzing has nothing to do with interlace but more with the down converting methode you use. Do you use Compressor to convert from your 1080 timeline to your SD Mpeg? And if you do do you switch on the frame control tab in Compressor? I would export the seq from FCP using compressor. Doing this there is no need to export a quicktime first. In Compressor choose the DVD-SD setting from the presets you like (I use the 120min DVD settings for best compatibility with most players) and make sure that the frame controls are switched on. Most likely there are not on which will cause a very bad downscaling quality, which in turn is probably what is causing your buzzing right now.
Sorry that this got a bit long but I think once you understand the whole progressive – interlace thing problems become much more easy to solve.
Hope this will help a little 🙂 and everybody else please pitch in for corrections or additions!
Carsten
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boot up with your leopard install dvd!
after the initial hello select restore from the menu and choose your backup drive.
select the day/version you want to go back too.
restore will then completely replace your current system drive content with the backup version you choose.
might take a while but it works!. done it twice -
Nope it doesn’t affect capture or any other function of Final Cut and any of the Studio applications.
I’m with David here. The best backup system I ever used (end never even notice its there)
And you can easily trigger it manually too. Select to display it in the menu bar and from there you can select ‘back up now’. For those times you need to be sure and don’t want to wait for the hour interval.
re Michaels comments: you can restore anything you like, but sometimes you actually need to do a complete system restore instead of just one file(s) I’ve done this twice since Leopard came out and it just works. No more danger upgrading FCP/QT/System as you can always go back 🙂
The only one problem that I found was the following: I only use an equal sized backup drive (120GB system to 120GB backup) because time-machine does incremental backups the drive filled up pretty quickly. Because I had ‘warn before deleting old files’ checked in the time machine preferences, time machine got stuck. After deselecting the option and letting time machine delete the oldest version automatically all is working perfect now.
Best advice: use it!
Cheers
Carsten
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You have to select the ‘Use F1…Fxx as standard function keys’ in the keyboard preferences of the System Preferences.
Carsten
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I think the DVD version is US$3000 and the webcam is US$400
for oceania: https://www.nikkomalaysia.com/
on this page you’ll also find links to purchase in europe or america….
Carsten
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You must have a version that we don’t have 🙂
In my 5.1.1 control panel version of the ioHD drivers there is no TC burn in option??Carsten
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Joseph
What sort of RT performance do you get?
The reason I’m asking is that I’m on a MacBookPro 2.33 and thinking about upgrading to a MacPro. I work in 1080psf25 ProRes so only a frame more per second then you. I monitor via the ioHD. Drives are Raid0 Sata.
I get 2 stable streams and with luck 3. None of the filters is fully real time but many are preview quality (green). But when stacking more then 2 things quickly go red.
Cheers
Carsten
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theoretically your right as the HDMI signal can be converted to DVI by just buying a simple adapter.
BUT
this will not work with the cinema display because the Apple doesn’t support video frequencies (50/60 Hz) directly.
you can either buy a consumer LCD/Plasma TV or what I did get a computer LCD which supports video signals. I got the BenQ W241 which fully supports all HD standards including 1080p (cheap and really good quality). But other manufactures have models that work too (Dell, Samsung)
Or you need the converter Gary mentioned, and Blackmagic makes one too.Carsten
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Yes Flip4Mac
BUT I also just discovered: Visualhub: https://www.techspansion.com/visualhub/
Does not only Windows Media but a lot of other flavors as well. And its cheaper 🙂
One does it all!