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60i and 30 frames in the same project?
Hey all,
Hoping someone has an answer for my conundrum!. I have footage from two cameras of a live event that I need to edit. Turns out one camea (a Canon GL2) was shooting in 30f and the second camera (a Canon XH-A1s) was shooting in 60i. Can you edit with these two frame rates in the same project? I know I could just try it and see but I’m several weeks out from starting post on this project. Any idea?
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8 Replies
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You should have no problems here. Set your project to match whichever one you prefer, and the other will import just fine.
The clip that does not match the timeline setting will simply display a red “render bar” above it, indicating that it needs to be rendered for realtime playback.James Brady
Senior Editor
Results Video & Animation
El Paso, Texas
http://www.resultsvideo.com -
Sorry if I use this thread but it could be connected… I am trying to find a way of converting 50i footage to 50p footage (not 25p) without frame duplication… using an algorithm similar to what good 100Hz LCDs do real time.. but I don’t find such algorithm…. What these TV sets do is… I’ve been told… create frames through interpolation…
Let’s say footage is 50i…. there are 25 frames with 2 fields.. Every frame is 1u1l, 2u2l, 3u3l, etc…
What these TV sets do is create 50frames interpolating this way: 1u1l, 1l2u, 2u2l, 2l3u, 3u3l, etc…
In this way it actually creates NEW FRAMES with almost (ok there is interpolation) full resolution.
What software or plugin does this?siRoma di Marcello Mazzilli
Corporate video productions in Italy
http://www.siroma.com -
Marcello,
Adobe Premiere Pro will do this for you:
Import your 50i footage into a 50i timeline. Set the clip’s speed to 50%. Export the slow-mo clip as a new (twice as long) 50p clip (or 50i clip–it won’t matter because Premiere will account for the i vs p on the next step…
Now, import the 50i slowmo clip into your project. Right click on the clip and select “interpret footage…”. Select “Assume this frame rate” and set the value to 50fps. Click OK. Now bring your new clip into a 50P timeline and you’re good to go. A quick frame-by-frame should show you that you have 50 unique images (albeit combined images from the original interlaced 50i). Not TRUE 50P, but unfortunately the only way to get that is to shoot it that way!Best,
JamesJames Brady
Senior Editor
Results Video & Animation
El Paso, Texas
http://www.resultsvideo.com -
I’m sorry but is not working.. I might be missing something.
When i frist slow down I get a normal interpolation and not the algorithm I was talking about… You can see this because you get odd frames very contrasted and even frames very blurred.. The even frames (one every two) are actual interpolation of one field.
The scheme that comes out is not 1U1L 1L2U 2U2L 2L3U 3U3L
But is 1U1L 1U12int 2U2L 2U23int etc…By doing this the picture is not sharp but one frame every 2 is blurred.
When you export and do all the rest you keep this problem.
So still you have 50 different frames but they are actual normal interpolated by premiere frames.At least this is what I am understanding.
siRoma di Marcello Mazzilli
Corporate video productions in Italy
http://www.siroma.com -
Let me see if I understand “1U1L 1U12int 2U2L 2U23int etc…”.
You’re saying that when you set a clip to 50% speed, its resulting interpolated frames are made up of one upper field and one lower “blended” field? (rather than one field from each adjacent frame).If so, I cannot recreate this algorightm. Are you using Adobe Premiere Pro?
James Brady
Senior Editor
Results Video & Animation
El Paso, Texas
http://www.resultsvideo.com -
Yes.. i am using CS4.
Yes.. you understand my “algorithm writing”
You can test yourself… Premiere interpolates but “thinks” a different way.
You can get it either to interpolate one field or the whole frame but not to create a “real” new frame with the second field from the first frame and the first field from the second frame.Funny because 100Hz LCDs do this all the time live.
I don’t know exactly how 200 Hz LCDs work !!!siRoma di Marcello Mazzilli
Corporate video productions in Italy
http://www.siroma.com -
That’s odd… I have tested it–and I am getting the 1U1L/1L2U/2U2L/2L3U… version that you want.
Although I am on 60/120hz so I have been testing this using 60i/60P.
Maybe Premeire interpolates 50/100hz differently… but I can’t imagine why.Well, sorry I couldn’t lend more help.
James Brady
Senior Editor
Results Video & Animation
El Paso, Texas
http://www.resultsvideo.com -
Very strange. Never mind.. I’ll go on trying.
Sorry for Brian.. I hope he got the answer he needed
MsiRoma di Marcello Mazzilli
Corporate video productions in Italy
http://www.siroma.com
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