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Activity Forums Apple Final Cut Pro Legacy Slow motion with AVCHD footage, 60i to 24p?

  • Slow motion with AVCHD footage, 60i to 24p?

    Posted by Ryan Schultz on November 14, 2010 at 4:20 am

    Hey everyone,

    I’ve been searching for weeks for an answer to my question and find things only partially relating to my question. Here goes: I recently purchased a Sony HDR-AX2000 and for an upcoming project I need fluid slow motion.

    My settings I shot in:
    1080 60i
    120fps (I also tested 1/500, 1/2000, and many more)

    Now, I’ve read post after post that says all I have to do is use CinemaTools to convert my 60i footage to 24p for a smooth slow motion effect.

    Here’s my problem: When I use Log and Transfer to transfer my 60i footage from the card/folder I copied to, I discovered that it’s automatically changing the “shooting rate” to 30 (see picture). So, when I went to use CinemaTools, I thought I was converting 60i to 24p, but I’ve really been converting 30 to 24, which doesn’t help much at all. Also, when I slow the footage in FCP 6 it’s very choppy (whether I use frame blending or not, and frame blending makes for a crappy slow motion anyway. What do I need to do? I need to know how to Log and Transfer 60i, set the appropriate sequence settings for editing, and produce the video in 24p ultimately but with smooth slow motion from the 60i footage. Help!

    Oh and I tried this tut, but it assumes I have 60i footage on my mac, but like I said FCP 6 is using the standard Apple ProRes 422 codec and converts it to 30 no matter what.

    SUNY Oswego (DM: Broadcasting & Graphic Design)
    Sony HDR-AX2000
    MacBook Pro (Snow Leopard) 2.66Ghz, 4GB RAM

    Paul Leavitt replied 15 years, 3 months ago 4 Members · 11 Replies
  • 11 Replies
  • Shane Ross

    November 14, 2010 at 4:50 am

    [Ryan Schultz] “120fps (I also tested 1/500, 1/2000, and many more)”

    That isn’t FPS. That’s the SHUTTER SPEED. Big difference. FRAMES PER SECOND that is not. The camera isn’t capable of shooting that many FCP. Again, shutter speed.

    [Ryan Schultz] “When I use Log and Transfer to transfer my 60i footage from the card/folder I copied to, I discovered that it’s automatically changing the “shooting rate” to 30 (see picture)”

    I guess that you don’t know what “60i” means. The “i” refers to INTERLACED. SO when you have 60i, that’s 60 INTERLACED FIELDS…two fields in a second…so 30fps. 1080i60 is 30fps…not 60fps. If you shot 60p…”p” meaning PROGRESSIVE, then you’d have 60fps. But not many cameras shoot 1080p60. The cameras that shoot 720p do shoot 720p60. And THAT is the footage type that you slow down. But your camera doesn’t shoot 720p…

    You aren’t shooting a high frame rate with that camera, so you can’t shoot to produce smooth slow motion. You can only use post processes, like TWIXTOR.

    Shane

    GETTING ORGANIZED WITH FINAL CUT PRO DVD…don’t miss it.
    Read my blog, Little Frog in High Def

  • Rafael Amador

    November 14, 2010 at 9:32 am

    [Shane Ross] “You aren’t shooting a high frame rate with that camera, so you can’t shoot to produce smooth slow motion. You can only use post processes, like TWIXTOR.”
    Shane,
    The best way to treat 1080i60/50 footage is with FIELD-KITS.
    From the i60/50 makes an awesome p60/50 to be Conformed with CinemaTool or for further slow-down with TWIXTOR.
    Rafael

    http://www.nagavideo.com

  • Ryan Schultz

    November 14, 2010 at 5:45 pm

    Thank you both for your help. I didn’t realize that it only works for 720p footage. Do the settings matter much if I’m going to edit the footage in post?

    Rafael, where can I find this “FIELD-KITS.” I did a quick Google search but nothing came up software-wise. And yes I’ve read a lot about Twixtor but don’t want to pay for it, I don’t have a lot of money after buying the camera and some equipment to go with it, Is field-kits cheaper?

    SUNY Oswego (DM: Broadcasting & Graphic Design)
    Sony HDR-AX2000
    MacBook Pro (Snow Leopard) 2.66Ghz, 4GB RAM

  • Rafael Amador

    November 14, 2010 at 9:47 pm
  • Ryan Schultz

    November 14, 2010 at 10:04 pm

    Oh I see, it’s the same authors of Twixtor. Hm, maybe because my camera cant shoot 720p and it would cost an extra grand for a camera that could I’ll just have to suck it up and buy on of these programs.

    Well now I’m wondering, should I get Twixtor or FieldsKit? In the end they both produce the same goal of smooth slow motion correct? What are the advantages and disadvantages of both for creating a smooth slow motion?

    SUNY Oswego (DM: Broadcasting & Graphic Design)
    Sony HDR-AX2000
    MacBook Pro (Snow Leopard) 2.66Ghz, 4GB RAM

  • Rafael Amador

    November 14, 2010 at 11:08 pm

    [Ryan Schultz] “ell now I’m wondering, should I get Twixtor or FieldsKit? In the end they both produce the same goal of smooth slow motion correct? What are the advantages and disadvantages of both for creating a smooth slow motion?”
    They are two different tools.
    With Fieldskit you can get a 1080p60 movie out of the 1080i60; then you can Conform to p24 in CinemaTool.
    You get a perfect slow down to 40% of the original.
    This would be the best quality slow mow you can get.
    Use Twixtor if you need further slow down.

    And, why don’t you try with Compressor?
    You need to do something similar.
    You must convert your 1080i60 to 1080p60, then CinemaTools.
    rafael

    http://www.nagavideo.com

  • Ryan Schultz

    November 15, 2010 at 2:38 am

    Oh wow, I didn’t even know you can use Compressor. I just did a search and found out what settings I need to convert my 1080 60i footage to 1080 24p in Compressor. It’s running now, very slowly but it’s running. Then I’m assuming I just drop it into my timeline because there’s no point in using CinemaTools if the footage is already 24p. Thanks a lot for the help! I hope this works.

    SUNY Oswego (DM: Broadcasting & Graphic Design)
    Sony HDR-AX2000
    MacBook Pro (Snow Leopard) 2.66Ghz, 4GB RAM

  • Ryan Schultz

    November 15, 2010 at 12:39 pm

    Oh oops, I just realized you wrote 1080i60 to 1080p60. I’ll try that in compressor.

    SUNY Oswego (DM: Broadcasting & Graphic Design)
    Sony HDR-AX2000
    MacBook Pro (Snow Leopard) 2.66Ghz, 4GB RAM

  • Paul Leavitt

    February 9, 2011 at 12:43 am

    I’m having the same problem as well.
    I’d like to ask a clarifying question. When I import my 60i footage, FCP says it’s 60i footage, but there’s only 30 frames a second. So it’s already compiled the interlaced fields into 30p footage. Is this what I need to interpolate to get 60p?
    Thanks!

  • Shane Ross

    February 9, 2011 at 3:28 am

    [Paul Leavitt] “When I import my 60i footage, FCP says it’s 60i footage, but there’s only 30 frames a second.”

    60i means 60 INTERLACED fields. There are two fields per second…thus 30 frames per second. 1080i60 is 30fps. 720p60… 60p…mean 60 PROGRESSIVE FRAMES per second…that indicates full frames. 60p is 60fps, 60i is 30fps. 720p is the main format that shoots 60fps. To get 1080p you need a special camera…typically very high end, or lately, a panasonic consumer model does that format too. But 1080p60 is a RARE specialty format… uncommon as all get out.

    Shane

    GETTING ORGANIZED WITH FINAL CUT PRO DVD…don’t miss it.
    Read my blog, Little Frog in High Def

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