4K Time Lapse

**eccs19** · 06-17-2016, 07:00 AM

Quick question. I was playing around with the 4K time lapse feature last night. Took a run of 300 shots. 10 seconds between the shots. I expected about a 10 second video based on 30 fps. Video ended up being about 30+ seconds. Is the 4K feature using some crazy frame rate, or is it adding extra frames to "blend" frames together?

Kennod · 06-17-2016, 07:36 AM

What software are you using to make the timelapse? Check the frame rate setting.

stevebrot · 06-17-2016, 07:59 AM - **1 Like**

I think you will find that multiple copies of each frame are part of the final video. That is part of how Pentax does in-camera interval video.

Steve

**eccs19** · 06-17-2016, 08:22 AM

Originally posted by stevebrot

I think you will find that multiple copies of each frame are part of the final video. That is part of how Pentax does in-camera interval video.

Steve

That's the only thing that makes sense. I wonder if that's why it looks choppy, or if I needed a longer shutter speed and shorter pause between shots. All trial and error.

CDW · 06-17-2016, 08:34 AM

I've made time lapse videos in the past on a K3 and I never experienced what was described. I think the issue is the frame rate setting. Depending on the subject matter, the interval between frames may contribute to the choppiness. I always used 2-3 second intervals to achieve a smooth flow of cloud movement, etc.

**bobbotron** · 06-17-2016, 08:35 AM

Originally posted by eccs19

That's the only thing that makes sense. I wonder if that's why it looks choppy, or if I needed a longer shutter speed and shorter pause between shots. All trial and error.

Longer shutter speeds definitely help with this kind of thing. To be honest, I find the timelapse output from pentax cameras a good starting point for TL video, like many things, it can deal with some post processing.

RonHendriks1966 · 06-17-2016, 08:38 AM

Unless it changed...... The camera makes images as you told it and makes two copieus of them. 5 of those make up for one second in the movie clip. So the frame rate is 15 fps, but only 5 different frames are in it.

stevebrot · 06-17-2016, 08:49 AM

Originally posted by RonHendriks1966

Unless it changed...... The camera makes images as you told it and makes two copieus of them. 5 of those make up for one second in the movie clip. So the frame rate is 15 fps, but only 5 different frames are in it.

Yes, something like that. Some time ago there was an extensive discussion of this along with methods to remove the extra frames. I believe that the most viable solution suggested was to do it the old fashioned way and shoot the intervals as stills, crop to 4K in post, and assemble using a video editor.

Steve

**eccs19** · 06-17-2016, 09:19 AM

All great information. Thanks all.

**bobbotron** · 06-17-2016, 09:51 AM - **1 Like**

I decided to skip the timelapse feature all together... now I set it up to shoot intervals and merge the photos afterwards with ffmpeg. This lets you get exactly what kind of results you're looking for. I can find how I do this and post it up if there's interest.

Not a great video, but this is how I generated this timelapse.

You Tube

Unregistered User · 06-17-2016, 10:16 AM - **1 Like**

The internal time laps video gets choppy due to repeated frames. There is a tutorial somewhere on the K-3 forum...

06-17-2016, 07:00 AM	#1
eccs19 Site Supporter Join Date: Jul 2008 Location: Lisle, Ontario Photos: Gallery Posts: 1,510	4K Time Lapse Quick question. I was playing around with the 4K time lapse feature last night. Took a run of 300 shots. 10 seconds between the shots. I expected about a 10 second video based on 30 fps. Video ended up being about 30+ seconds. Is the 4K feature using some crazy frame rate, or is it adding extra frames to "blend" frames together?

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06-17-2016, 07:36 AM	#2
Kennod Senior Member Join Date: May 2011 Location: Melbourne Posts: 126	What software are you using to make the timelapse? Check the frame rate setting.

06-17-2016, 07:59 AM - 1 Like	#3
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	I think you will find that multiple copies of each frame are part of the final video. That is part of how Pentax does in-camera interval video. Steve

06-17-2016, 08:22 AM	#4
eccs19 Site Supporter Join Date: Jul 2008 Location: Lisle, Ontario Photos: Gallery Posts: 1,510 Original Poster	Originally posted by stevebrot I think you will find that multiple copies of each frame are part of the final video. That is part of how Pentax does in-camera interval video. Steve That's the only thing that makes sense. I wonder if that's why it looks choppy, or if I needed a longer shutter speed and shorter pause between shots. All trial and error.

06-17-2016, 08:34 AM	#5
CDW Site Supporter Join Date: May 2011 Location: Big Island, Hawaii & Utah Posts: 457	I've made time lapse videos in the past on a K3 and I never experienced what was described. I think the issue is the frame rate setting. Depending on the subject matter, the interval between frames may contribute to the choppiness. I always used 2-3 second intervals to achieve a smooth flow of cloud movement, etc.

06-17-2016, 08:35 AM	#6
bobbotron Site Supporter Join Date: Jan 2015 Location: Ottawa, ON Photos: Gallery Posts: 3,349	Originally posted by eccs19 That's the only thing that makes sense. I wonder if that's why it looks choppy, or if I needed a longer shutter speed and shorter pause between shots. All trial and error. Longer shutter speeds definitely help with this kind of thing. To be honest, I find the timelapse output from pentax cameras a good starting point for TL video, like many things, it can deal with some post processing.

06-17-2016, 08:38 AM	#7
RonHendriks1966 Banned Join Date: Jan 2009 Photos: Gallery Posts: 9,675	Unless it changed...... The camera makes images as you told it and makes two copieus of them. 5 of those make up for one second in the movie clip. So the frame rate is 15 fps, but only 5 different frames are in it.

06-17-2016, 08:49 AM	#8
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by RonHendriks1966 Unless it changed...... The camera makes images as you told it and makes two copieus of them. 5 of those make up for one second in the movie clip. So the frame rate is 15 fps, but only 5 different frames are in it. Yes, something like that. Some time ago there was an extensive discussion of this along with methods to remove the extra frames. I believe that the most viable solution suggested was to do it the old fashioned way and shoot the intervals as stills, crop to 4K in post, and assemble using a video editor. Steve

06-17-2016, 09:19 AM	#9
eccs19 Site Supporter Join Date: Jul 2008 Location: Lisle, Ontario Photos: Gallery Posts: 1,510 Original Poster	All great information. Thanks all.

06-17-2016, 10:16 AM - 1 Like	#11
Unregistered User Guest	The internal time laps video gets choppy due to repeated frames. There is a tutorial somewhere on the K-3 forum...

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