ultra slow motion, which resolution/fps

K

kumi

New member
hey guys

next week i go outdoor-bouldering with some friends and i want to make a nice compilation of it

i have a gh13 and a hdr-ax2000. i wanna use the gh13 for ultra-slow motion & some closeups and the sony for point&shoot cause its easier to handle and to setup

the sony hdr-ax2000 is limited to 1080p25 . so i only can adapt the gh13. which hack should i use for it so i dont have to mess arround in post?


my thoughts:
take the 75mbit peak hack(20fps-gop) shoot @ 720p50 and downscale the sony footage, so finally i have 720p/25

take the 50 avchd fast action patch(3fps-gop) @ 720p30 (isnt it a mess playing around with diffrent framerates?!)


what do oyu think?

thanks
 
720p @ 50 FPS with the hack will give you excellent results. Shoot in S priority mode with a sharp and stabilized lens. Crank the shutter speed as fast as your lens will allow. The faster the shutter speed the sharper the image.

Then just simply slow the video down to 40% and render to 1080p @ 24 FPS. Overlay some music and it will work well. Or atleast it seemed to work well for me when I shot this video last week.

http://www.youtube.com/watch?v=4BOmbVuzkLk&t=6m18s

 
hi
yeah that looks pretty cool. the shots seem pretty stable how did u make it? what apperture/shutter speed where you shooting? what sideeffekt does a high shutter speed has?? except darken the image
i still dont know what is better smaller gop or higher fps ?!

i might shoot @ 1080p and software-warp the image down to 720p so it is 100% stable and looks like shot on a dolly/crane
 
Trust me just follow the instructions I listed above. Every bit of that video was shot hand held while I cheered on the competitors. I used the 14-140mm lens. However, any Panasonic stabilized lens will work for bouldering. The 14-42mm will work and it is much cheaper.

Don’t try to use software to interpolate in the frames. It works in some situations. However, it fails in a whole lot more situations. Just shoot 720p @ 60 FPS and make sure your shutter speed is fast(ie: 1/120 or faster) for all of the scenes you want to do slow motion on.

For the scenes where they are doing static moves just shoot 1080p @ 24 FPS for those. That is what I did. I switched back and forth from 720p to 1080p depending on whether there were dynamic moves or not.

If you are shooting 1080p @ 24 FPS then make sure the shutter speed is fixed at 1/50th. This is very important. 24 FPS is not sufficient to do slow motion. Therefore, you really need to make sure to stick by the 1/(shutter speed) x 2 rule. That rule does not apply for slow motion shots. For those you want the image to be sharp and well defined.

Try it out before you shoot it for real. Just film the cars going by and see which one works best. You will come to find that what I listed above is the best solution because I have already done the testing for you.

Remember to post the video when you get it done. I love watching climbing videos.
 
720p 60 shot at around 1/250 then retimed with twixtor.

Twixtor actually now works from the Sony Vegas Pro 10 timeline as well.

This was at 48mb i believe. One of the early avchd patches.
 
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