60i to 24p slow motion in After Effects

**semicolon** · 2008 January 19th, 15:33

I know there are many posts like this, but not every one has precise instructions on how to perform 60i to 24p slow motion.

http://www.vimeo.com/619595

Video was shot in HDV (60i) mode, cinema mode color settings, the exposure locked with shutter speed at 1/120.
Captured via HDVSplit
In after effects, import the footage into the Project pane
Right click the footage in the project pane, go to Interpret Footage > Main
Make sure Separate Fields (Upper) is turned on and then check Preserve Edges (Best Quality Only) on
Made a new comp by dragging the footage to the "Create A New Composition" button
Go to Composition > Composition Settings, set the frame rate to 23.976
Right click on the footage in the timeline, go to Time > Time Stretch... and set the Stretch Factor to 200%

From what I see, it looks like After Effects is really generating individual frames for each slowed step.

In my video there is a large master timeclock on the top and then one in the lower right, showing the exact time of the footage as it is being slowed down. (The time of the slowed footage is not exactly half that of the project time because the slowed footage file starts something like 2 seconds before the project timeline)

It works very well, is totally painless, and doesn't require the rendering or processing of any additional files.

**klawchi** · 2008 January 19th, 15:40

Thanks for the sittings, but the Video on vimeo has a problem.

**semicolon** · 2008 January 19th, 15:45

Originally Posted by klawchi

Thanks for the sittings, but the Video on vimeo has a problem.

Oh? It's playing fine for me. What problem is it giving you?

**Dota** · 2008 January 19th, 15:56

awesome

**klawchi** · 2008 January 19th, 16:39

it just stops at 00:07!

**ODDNAME** · 2008 January 19th, 16:39

For me it freezes after a few seconds.

It seems to happen only with HD on at 5.07

**semicolon** · 2008 January 19th, 18:01

Originally Posted by ODDNAME

For me it freezes after a few seconds.

It seems to happen only with HD on at 5.07

Strange, I'm not having any problems with it.
Not sure what the problem could be, either.

**MSPI** · 2008 January 19th, 18:04

Played all the way through for me no issues....thanks for all the slow mo tests and settings!

**Rickster** · 2008 January 20th, 19:50

Worked great for me!! Thanks for the Tutorial info as well... GREAT HELP!!!

and footage looks great as well!

**semicolon** · 2008 January 20th, 20:04

Originally Posted by Rickster

Worked great for me!! Thanks for the Tutorial info as well... GREAT HELP!!!

and footage looks great as well!

Thanks!

In my instructions and in the footage I have the shutter speed locked at 1/120. I'd say that's probably the lowest you could go without creating unnatural motion blur. Next time I use this technique, I'm going to try to have the shutter speed bumped up a little faster.

**stevesampson** · 2008 February 1st, 18:50

I've lurked here for a bit trying to figure out how to get the most out of my hv20 purchase. I must say that your video is absolutely awesome! Showing both panes gives a unique perspective on what something can look like before and after time stretching. Very cool!

**gpobrien** · 2008 April 30th, 17:06

I followed your process that you put up. But when I try to play the footage outside of Adobe AE it stops for a few seconds a continues playing. When i insert it into FCP it is really choppy. Now there could be a few explanations for this. When I looked at the info for the file after it was finished in AE it said the file was 2 gb big! before i put it in AE it was only 40mb big. Would it have to do with the output that I am choosing for it. I put it as quicktime movie. I was going to load what i have on vimeo, but 2 gb is far to big. I need some help on this, and I am not trying to hijack thread, I just want the same sort of results that you had.

btw, im working with a mac, thanks again

**decay79** · 2008 May 1st, 04:03

gpobrien it's certainly the file output. Probably you just left at animation uncompressed. This is fine if you want to make other edits in other programs or even in after effects.
What I usually do is render the final movie in animation and then deliver all the other formats from that file.
If you want to work without that stuttering create a low version of your file which won't put so much strain on your system and then on the final rendering replace it with the big file.

Oh and semicolon VERY NICE! And the instructions are extremely clear! Thanks!

**mike m** · 2008 December 30th, 03:08

how did you upload the footage to begin with? i know you can capture in premiere pro but can you capture in AE as well?

**mike m** · 2008 December 30th, 03:12

also. the only reason its slow is because of the time stretch right? if you do all BUT the last step its just 24p at normal speed right? i just ordered my hv30 and cant wait lol

**semicolon** · 2008 December 30th, 05:45

Originally Posted by mike m

how did you upload the footage to begin with? i know you can capture in premiere pro but can you capture in AE as well?

I like to use a utility called HDVSplit for capturing. It, unlike premiere, allows you to capture your HD footage split into scene breaks instead of just one continuous file.
http://strony.aster.pl/paviko/hdvsplit.htm

**1900** · 2008 December 30th, 07:01

AWESOME !!!

ALL great ~ camera, slow motion，perspective, and ur facial expression~ ^_^

**Razaele** · 2009 January 14th, 11:45

[ame="http://vimeo.com/2826537"]http://vimeo.com/2826537[/ame]

SLOW MO TEST

**semicolon** · 2009 January 14th, 12:13

Originally Posted by Razaele

SLOW MO TEST

If you were attempting to follow the instructions I posted above, it looks like something may have gone wrong on a step somewhere- to me it looks like your video is the result of frame blended slow motion, not the true 60 frame slow motion as described above.

**MadSammyboy** · 2009 January 16th, 15:45

Very cool... very helpful. Thanks for this!

**SenorKaffee** · 2009 January 16th, 16:14

By the way, be careful with the "Pixel-Motion" of the latest AFX versions.
A few weeks ago I tried to push it to the extreme and it can really mess up the picture.

[ame="http://vimeo.com/2404403"]Canon HV20 SLOMO Test with 25p and 50i Footage on Vimeo[/ame]

**p.hoehsl** · 2009 January 16th, 16:23

Originally Posted by semicolon

Video was shot in HDV (60i) mode, cinema mode color settings, the exposure locked with shutter speed at 1/120.
Captured via HDVSplit
In after effects, import the footage into the Project pane
Right click the footage in the project pane, go to Interpret Footage > Main
Make sure Separate Fields (Upper) is turned on and then check Preserve Edges (Best Quality Only) on
Made a new comp by dragging the footage to the "Create A New Composition" button
Go to Composition > Composition Settings, set the frame rate to 23.976
Right click on the footage in the timeline, go to Time > Time Stretch... and set the Stretch Factor to 200%

You'd get a smoother (and longer) result if during Interpret Footage > Main you also set your frame rate to reconform to 23.976 - ie. the same as your composition.

The fun really starts when instead of Time Stretch you go to Effect > Time > Timewarp... and set Method to Pixel Motion, Adjust Time By to Speed and set Speed to 25 - this would be equivalent to a 400% Time Stretch. This will however take quite some render time.

Keyframing the Speed factor can give you some pretty awesome results too.

Peter

**p.hoehsl** · 2009 January 16th, 16:25

Originally Posted by SenorKaffee

By the way, be careful with the "Pixel-Motion" of the latest AFX versions.
A few weeks ago I tried to push it to the extreme and it can really mess up the picture.

Pushing the extreme can mess up a lot of things

**joboh** · 2009 January 17th, 18:35

Originally Posted by semicolon

I know there are many posts like this, but not every one has precise instructions on how to perform 60i to 24p slow motion.

http://www.vimeo.com/619595

Video was shot in HDV (60i) mode, cinema mode color settings, the exposure locked with shutter speed at 1/120.
Captured via HDVSplit
In after effects, import the footage into the Project pane
Right click the footage in the project pane, go to Interpret Footage > Main
Make sure Separate Fields (Upper) is turned on and then check Preserve Edges (Best Quality Only) on
Made a new comp by dragging the footage to the "Create A New Composition" button
Go to Composition > Composition Settings, set the frame rate to 23.976
Right click on the footage in the timeline, go to Time > Time Stretch... and set the Stretch Factor to 200%

From what I see, it looks like After Effects is really generating individual frames for each slowed step.

In my video there is a large master timeclock on the top and then one in the lower right, showing the exact time of the footage as it is being slowed down. (The time of the slowed footage is not exactly half that of the project time because the slowed footage file starts something like 2 seconds before the project timeline)

It works very well, is totally painless, and doesn't require the rendering or processing of any additional files.

Semicolon
what are your export settings in after effects
thanks

**robindelange** · 2009 July 3rd, 07:57

Originally Posted by p.hoehsl

You'd get a smoother (and longer) result if during Interpret Footage > Main you also set your frame rate to reconform to 23.976 - ie. the same as your composition.

The fun really starts when instead of Time Stretch you go to Effect > Time > Timewarp... and set Method to Pixel Motion, Adjust Time By to Speed and set Speed to 25 - this would be equivalent to a 400% Time Stretch. This will however take quite some render time.

Keyframing the Speed factor can give you some pretty awesome results too.

Peter

When I use the Timewarp effect, only the speed of the video changes. Do you know how you can get the audio to play slow-motion as well?

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