wlaidlaw Posted February 25, 2016 Share #1 Posted February 25, 2016 Advertisement (gone after registration) I have been volunteered to take a video of my grandson's christening. To future proof it and also for watching it on the 4K TV I have in France, I am going to take it in UHD 3840 x 2160 and in MP4, so I can edit it in iMovie. Now what I don't know as a total video newbie is frame rate. I am told it is best to take it at a frame rate that "suits" your mains frequency, which is 50Hz in both UK and France. Now does this mean you should take in a frame rate that cannot "beat" as a harmonic with your mains frequency so use 30 fps for 50Hz and 25 fps for 60 Hz or is it the other way round? My Philips 4K TV can handle UHD inputs at both 25 fps and 30 fps. Link to post Share on other sites More sharing options...
Advertisement Posted February 25, 2016 Posted February 25, 2016 Hi wlaidlaw, Take a look here Video modes on the SL and frame rates?. I'm sure you'll find what you were looking for!
scott kirkpatrick Posted February 25, 2016 Share #2 Posted February 25, 2016 It's the other way round. In Europe, video is shot normally at 25 fps, and in the US at 24 or 30 fps. It's not quite 24, but slightly less, for reasons buried in broadcasting technology. scott Link to post Share on other sites More sharing options...
erudolph Posted February 25, 2016 Share #3 Posted February 25, 2016 25 fps for Europe. Also, when shooting video, if you shoot at a higher shutter speed, motion such as pans and people walking across the screen can seem jerky since there are only 25 images per second. Shooting at 1/25 sec will allow images to have a bit of motion blur and smooth things out. Best to do some testing ahead of time...! Link to post Share on other sites More sharing options...
wlaidlaw Posted February 25, 2016 Author Share #4 Posted February 25, 2016 Ed, I did wonder if I might be better shooting at 1080p at 50 or 60 fps, which is a lot quicker and easier to edit in iMovie. Editing 4K/UHD in iMovie even on a 2.7 gHz MacBook Pro with 16GB of RAM is a very slow business as it sits crunching away on all the data. I have bought a 128GB UHS-II card in anticipation, as my existing 64GB cards would fill quite quickly if I was taking UHD. I believe UHD/25fps uses about 25 mB per second or 40 seconds per gigaByte. The other point is how does the battery last on video. I will have to run a test. Wilson Link to post Share on other sites More sharing options...
erudolph Posted February 25, 2016 Share #5 Posted February 25, 2016 Yes, test. And if you decide to shoot at 50p or 50i, then a shutter speed of ~1/50, unless you find you don't mind that slightly steppy look. Link to post Share on other sites More sharing options...
pop Posted February 25, 2016 Share #6 Posted February 25, 2016 I would suggest to select the native frame rate for the TV in both France and Britain. I would also suggest to think again about the resolution needed for this particular project. It's not that you will be filming a cavalry battle or something where you need to be able to discern every single detail. Link to post Share on other sites More sharing options...
nscali Posted February 26, 2016 Share #7 Posted February 26, 2016 Advertisement (gone after registration) I am also in a PAL (25/50 fps) country but I prefer the look of the 4K footage shot at 30 fps. It feels less choppy (as opposed to 25fps). Interestingly, when I set the camera to 30p and use shutter speed of 1/60th I get the light doing its out of phase thing, so I have to drop it to 1/50th and all is ok. Link to post Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.