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“High Speed Photography” to scale down to 30p?
Hello,
I am wondering if it would be feasible to shoot footage with my GL2 at a faster than 30 frame rate, in order to scale it down to 30 for good, smooth, clean slow motion..
The hypothetical situation I’m assuming and hoping will work is,
shoot at 60fps (or if possible, higher) without interlacing (using “frame movie mode” as I do with 30p?)
then capture the footage to a project with a 30p AV setting, etc
if this isn’t possible, then:
capture the 60 footage to it’s project, then cut and paste the clip to the 30p projectNow, this brings up a couple things..
Firstly, I don’t know much about using different frame rates than 30p, since I find interlacing unnaceptable, so i never dabble in it..CAN I shoot at 60p using “frame movie mode” or for that matter, 75p, 100p, etc
is the max frame rate that can use progressive 30fps on a GL2?Will a project of 30p even accept footage of a faster frame rate? and if so, will it scale as I expect it to, resulting in clean slow motion, or will it end up being distorted in some way I’m noy aware of?
thanks so much for any help, sorry if this is confusing.
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6 Replies
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The GL2 is not capable of any other frame rates, only 29.97. Only HD cameras like the Varicam can record variable speeds, like 60p.
Shane
Littlefrog Post
http://www.lfhd.net -
really?
thats too badwell, would it be possible to film something at 60i, then bring it into a 30p project and do some interpolation, or deinterlacing? I know the quality would take a slight hit, but if its possible id at least like to check it out
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Yes, shoot normal 60i, then apply my G Map Frames filter to convert it to half speed 30p – should work great for nice, quick 50% slowmo.
BTW, there’s a lot of problems with naming formats and frame rates. My preference is 60i because 60 is the temporal rate – ie, 60 images a second, and i is the method they’re stored – interlace. To call the above 30i as some do, and I think, some people like the EBU prefer, I do not like because although the timebase is 30, ie 29.97fps for NTSC, there are 30 frame, each made of 2 interlaced fields. Now, 30i is twice as smooth as 30p, and there’s no disagreement that 30p is called 30p, so shouldn’t 30i be called 60i because it’s twice as smooth as 30p?? I will now get down from my soap box….
Graeme
– http://www.nattress.com – Film Effects and Standards Conversion for FCP
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I’ve got a great way…
You need Compressor or you can do it in Shake too…
But basically, you convert it to 720p60 AT 60 frames per second and then use cinema tools to conform to 24.
Fantastic slow motion… https://homepage.mac.com/captmench/WaterTest.mov
https://members.shaw.ca/alex.mitchell/slowmotutorial.pdf
Or… for the shake way…
https://www.proapptips.com/videos/60iTO24pqt6.mov
CaptM
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And then there are the butt heads like me who like to use 30i & 60i (or 25i & 50i) interchangeably! 😉 It’s arguable either way. You have a 30 fps timebase, 30 whole pictures per second, but 60 fields per second. So, depending on context, either should be correct.
I’ll climb down off Graeme’s soapbox now, too.
Arnie
Now in preproduction: Peristroika (Cosmological Congress), a film by Slava Tsukerman
https://www.arniepix.com
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