Timelapse - tips / best practice

The place for questions about shooting with Blackmagic Cameras.
  • Author
  • Message
Offline

Omar Mohammad

  • Posts: 210
  • Joined: Mon Apr 24, 2023 9:06 am
  • Location: Spain
  • Real Name: Omar Mohammad

Timelapse - tips / best practice

PostMon Dec 04, 2023 7:39 am

I am getting to know how to use BMCC6K, so I am still shooting in different modes.

I took a Time-lapse video yesterday as I will be using this technique more often for properties that have nice views.

Codec: Q0
Resolution: 4K DCI @ 30fps
Interval: 5 secs
Duration: 40mins
Shutter angle: 60 degrees
Focal length: 14mm @ f10

I watched a video where the creator used off speed recording, with lower fps than project's, along with time-lapse. It looked nice.



I know it is not possible to achieve constant exposure unless exposure is set to auto.

I would appreciate any tips to achieve best results for time-lapse videos.
MacBook M3 Pro 16”, 18 GPU cores, 36GB RAM, 1TB | Sonoma 14.4
BMCC6K-FF | Sigma 12-24 f4 | Canon 50 f1.8 | Sigma MC-21 Adaptor
DaVinci Resolve Studio 18.6.6
Offline
User avatar

Jeffrey D Mathias

  • Posts: 433
  • Joined: Fri Apr 28, 2017 3:54 pm

Re: Timelapse - tips / best practice

PostMon Dec 04, 2023 1:21 pm

An issue I have found with BMD cameras and time-lapse is that there is a rather fast limit to the slowest exposure that can be made. This limits the amount of motion blur to a 1/6 or 1/12 second block of time even though each exposure may be made for much longer intervals. A long blur time would take the jumpiness out. But then, motion sensors do not seem to be made for very long exposures... or maybe this is just BMD. But to get good long motion blur it seems one would need to do their time-lapse with a still type camera with a shutter that can stay open for long times.

That said, that is my challenge to get good time-lapse with sufficient motion blur that does not give that jumpy feeling... just smooth motion.
AMD Threadripper 1950x 16-core 3.4 GHz
96 GB Crucial DDR4 2666 ECC UDIMM RAM
AsRock Fatal1ty x399 motherboard
AMD Radeon Pro WX 8200 GPU
Windows 10 Pro 64-bit version 22H2, build 19045.3208
DeckLink 4K Extreme 12G
iPad Pro M2
Offline

Omar Mohammad

  • Posts: 210
  • Joined: Mon Apr 24, 2023 9:06 am
  • Location: Spain
  • Real Name: Omar Mohammad

Re: Timelapse - tips / best practice

PostMon Dec 04, 2023 8:28 pm

Jeffrey D Mathias wrote:That said, that is my challenge to get good time-lapse with sufficient motion blur that does not give that jumpy feeling... just smooth motion.


Hi Jeffrey. Could you please share a video of time-lapse with motion blur?
MacBook M3 Pro 16”, 18 GPU cores, 36GB RAM, 1TB | Sonoma 14.4
BMCC6K-FF | Sigma 12-24 f4 | Canon 50 f1.8 | Sigma MC-21 Adaptor
DaVinci Resolve Studio 18.6.6
Online
User avatar

Uli Plank

  • Posts: 21714
  • Joined: Fri Feb 08, 2013 2:48 am
  • Location: Germany and Indonesia

Re: Timelapse - tips / best practice

PostMon Dec 04, 2023 11:50 pm

You can record the slowest fps available and then use Fusion with a time average filter or S_TimeAverage from BorisFX (if you're scared of Fusion) on that footage to get more motion blur.

Some cameras are not exposing for 360 degrees, but a tad less. In such cases you may get dashed lines instead of smooth streaks from moving light sources or such.
Now that the cat #19 is out of the bag, test it as much as you can and use the subforum.

Studio 18.6.6, MacOS 13.6.6, 2017 iMac, 32 GB, Radeon Pro 580
MacBook M1 Pro, 16 GPU cores, 32 GB RAM and iPhone 15 Pro
Speed Editor, UltraStudio Monitor 3G
Offline

Omar Mohammad

  • Posts: 210
  • Joined: Mon Apr 24, 2023 9:06 am
  • Location: Spain
  • Real Name: Omar Mohammad

Re: Timelapse - tips / best practice

PostTue Dec 05, 2023 3:54 pm

Uli Plank wrote:You can record the slowest fps available and then use Fusion with a time average filter or S_TimeAverage from BorisFX (if you're scared of Fusion) on that footage to get more motion blur.

I will try it. Thanks.
MacBook M3 Pro 16”, 18 GPU cores, 36GB RAM, 1TB | Sonoma 14.4
BMCC6K-FF | Sigma 12-24 f4 | Canon 50 f1.8 | Sigma MC-21 Adaptor
DaVinci Resolve Studio 18.6.6

Return to Cinematography

Who is online

Users browsing this forum: Baidu [Spider], Bing [Bot], Mario Belamaric, steino and 49 guests