Hi,

On Fri, Oct 11, 2013 at 6:15 PM, SevereIdaho wrote:

Hi there everyone. I am looking to replicate an animation I found. However, I have no idea where to start.

The concept is easy, you have a picture of a supercell thunderstorm, and the goal is to get the supercell to rotate in the animation and make it look like its continuous motion. Something that doesn't restart from the beginning. It basically looks like the storm is rotating and continuing to rotate without restarting.

Well I looked at the picture. That does not look continuous at all to me. :-) There are big jumps in the animation.

My guess is that as typical internet users, we saw a lot of GIF, and don't have our expectation very high for animated gif. You know by experience that GIF quality is not high and your brain "expects" a shitty animation. But really imagine this same animation in a movie: you would never say it is a continuous rotation and you would wonder if this is a bad joke or very unskilled film-makers. :-)

I have an example, not sure who the author is, so I haven't been able to contact him/her. I am hoping this is something you can do with a script or at least have a step by step instructions to replicate.

The procedure to get continuous looking animations is that the last frame must be very close to the first frame, so that you could actually say the timeframe is a circle with no start nor end.

In this specific image, the whole storm thingy is kind of fuzzy, clearly moving, but the general form of the storm is always more or less the same. So that is not perfect continuity, as I said, but close enough for your brain to accept the concept of continuity and fill in the missing pieces for it to be believable. :-)

Technically in GIMP 2.8, frames are represented by layers. The bottom layer is the first frame, the top layer being the last. Once you have layers/frames that look ok, you can see a preview in Filters > Animation > Playback.
Finally when it looks all good, you export as GIF, and when the GIF options dialog shows up, you check "As animation", and "Loop forever", the time between each frame, etc.

And you are done.

Jehan

The example is attached. I opened it with GIMP but can't tell what steps were taken. I highly appreciate any help. Thanks.

-Gerrit

Attachments: * http://www.gimpusers.com/system/attachments/74/original/giphy.gif

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On 10/11/2013 07:18 PM, Jehan Pags wrote:

Hi,

On Fri, Oct 11, 2013 at 6:15 PM, SevereIdaho wrote:

Hi there everyone. I am looking to replicate an animation I found. However, I have no idea where to start.

The concept is easy, you have a picture of a supercell thunderstorm, and the goal is to get the supercell to rotate in the animation and make it look like its continuous motion. Something that doesn't restart from the beginning. It basically looks like the storm is rotating and continuing to rotate without restarting.

Well I looked at the picture. That does not look continuous at all to me. :-) There are big jumps in the animation.

My guess is that as typical internet users, we saw a lot of GIF, and don't have our expectation very high for animated gif. You know by experience that GIF quality is not high and your brain "expects" a shitty animation. But really imagine this same animation in a movie: you would never say it is a continuous rotation and you would wonder if this is a bad joke or very unskilled film-makers. :-)

I have an example, not sure who the author is, so I haven't been able to contact him/her. I am hoping this is something you can do with a script or at least have a step by step instructions to replicate.

The procedure to get continuous looking animations is that the last frame must be very close to the first frame, so that you could actually say the timeframe is a circle with no start nor end.

In this specific image, the whole storm thingy is kind of fuzzy, clearly moving, but the general form of the storm is always more or less the same. So that is not perfect continuity, as I said, but close enough for your brain to accept the concept of continuity and fill in the missing pieces for it to be believable. :-)

Technically in GIMP 2.8, frames are represented by layers. The bottom layer is the first frame, the top layer being the last. Once you have layers/frames that look ok, you can see a preview in Filters > Animation > Playback.
Finally when it looks all good, you export as GIF, and when the GIF options dialog shows up, you check "As animation", and "Loop forever", the time between each frame, etc.

And you are done.

Jehan

To add to Jehans's anwer,if you have a sequence of shots, you can fade the end into the beginning to avoid a sharp transition:

+---+---+---+---+---+---+---+---+---+---+ | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | +---+---+---+---+---+---+---+---+---+---+ +---+---+---+---+---+---+---+---+---+---+ | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | +---+---+---+---+---+---+---+---+---+---+ --------------------------------------------------------------------- +---+---+---+---+---+---+---+ | 3 | 4 | 5 | 6 | A | B | C | +---+---+---+---+---+---+---+

ImgA=75% Img7 + 25% Img0 ImgB=50% Img8 + 25% Img1
ImgC=25% Img9 + 25% Img2

On 10/11/2013 09:27 PM, Ofnuts wrote:

To add to Jehans's anwer,if you have a sequence of shots, you can fade the end into the beginning to avoid a sharp transition:

+---+---+---+---+---+---+---+---+---+---+ | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | +---+---+---+---+---+---+---+---+---+---+ +---+---+---+---+---+---+---+---+---+---+ | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | +---+---+---+---+---+---+---+---+---+---+ --------------------------------------------------------------------- +---+---+---+---+---+---+---+ | 3 | 4 | 5 | 6 | A | B | C | +---+---+---+---+---+---+---+

ImgA=75% Img7 + 25% Img0 ImgB=50% Img8 + 25% Img1
ImgC=25% Img9 + 25% Img2

Oops. I meant of course;

ImgA=75% Img7 + 25% Img0

ImgB=50% Img8 + 50% Img1

ImgC=25% Img9 + 75% Img2