After Effects CS3 Does .mpeg Reverse 3:2 Pulldown

[jmorton]

After Effects CS3 Does .mpeg Reverse 3:2 Pulldown

Two things:
1. when I capture 1080i 60 HV20 video clips in Premiere Pro CS3 they appear as .mpeg
2. when I first started editing these clips the output was terrible until I started outputting in .mpeg2. They look just as good as the original captured video now.

Okay.

Now, I have been able to reverse the 3:2 pulldown of HV20 24f video using After Effects CS3 and I get 23.976 realtime video out: no interlacing and 24 fps. I was so excited I didn't go to sleep last night. I documented the procedure in full and was prepared to post it here.

But when I render and output to lossless .avi the video looks terrible just like when I first started outputting my 1080i 6o video in Premiere Pro CS3.

At the moment I seem to be very limited as to the output formats available. Most of the selections are grayed out. I saw Flash and only a couple of other formats at the top of the selection menu (can't recall what these are at the moment.)

Tonight I'm going to find out how I can get mpeg2 out and I'm thinking that the video will look really good then.

If anyone has further suggestions let me know right here.

Visually, I find 23.976 fps realtime quite appealing.

I'll keep you all posted. :hv20-smilie03:

JM

[Eugenia Loli-Queru]

After Effects' pulldown removal might be doing the same wrong pulldown as Premiere LE 3.0 does. Check a thread on DVXUser where there are pictures of frames after the pulldown removal where it shows that the kind of removal Adobe does is not the correct one for Canon's HV20 24f.

[jmorton]

I hear ya. Thanks for returning my email. In it you did say Adobe does not do it, absolutely.

But then I read some other guys post and it got me thinking so I had to try it.

If you look at the embedded 24p in the 1080i 60 wrapper frame by frame you will see a perfect repeating cadence, I believe it's called, SWWSS or some shifted variant.

The S frames are solid seemingly perfectly interlaced and the W frames are clearly interlaced but the two fields in each S frame are shifted and blurred as you would expect them to be.

You must increase the view to 100% or else what you think you're seeing is an SSSSR pattern where the S frames appear solid and the R frame is merely being repeated from the previous S frame. But at 100% you can clearly see that it is the former description that is occurring.

This is the classic 3:2 pulldown.

I believe I will be able to demonstrate a 24p reverse pulldown at 23.976 fps using After Effects CS3 when I can figure out a suitable output match for the composition output from After Effects as I mentioned in my original post.

Look for youself at one of your own 24f 1080i 60 clips as I describe above and you'll see for yourself. So with this in mind I just can't believe Adobe would be unable to correctly implement the proper 3:2 reverse pulldown in After Effects CS3.

I do agree that it does seem strange that no one has yet demonstrated successfully accomplishing this minor feat but it is not surprising if you have looked at their Help file on the matter.

CS3 is new and so is the HV20. But as unlikely as it seems I believe that apparently no HV20 user has just figured out how to use the software yet to do it or more likely even tried. None have mentioned trying themselves have they?

My current output plays and it does say 23.976 realtime, etc. etc. as I say in my original post. I just have an output file mismatch that surely can be corrected without too much trouble.

I stll have faith. And I wouldn't be surprised that come the morning that I have either found a suitable output format to clearly prove it or I'll have not gotten another nights sleep. One or the other: I'm sure.

JM

[jmorton]

I simply have no more time to fool around with After Effects. If it does 24f reverse pulldown I'll have to let someone else tell me about it. I spent 10 hours trying to figure it out. I did make progress but I was spending too much time on it.

So I spent 10 minutes installing the Farnsworth / Szudzik method as described by Eugenia.

I ran the HV20Pulldown program and it worked first time flawlessly.

Three clicks and you're done.

I'm moving on.

Thank you Farnsworth, Szudzik, and Eugenia! :hv20-smilie03:

JM