• Adobe After Effects

  Timewarp tutorial for NTSC video to Film

  Posted by Chris Wright on June 27, 2008 at 7:39 am

  Timewarp tutorial for NTSC video to Film

  So, I have been reading creative cow and really enjoy it, and wanted to contribute the best

  method I know of turning NTSC 29.97 interlaced footage into excellent film movement and

  visual quality. This method takes no shortcuts in visual quality or motion. You will start

  from 29.97i and end with 23.976p smooth motion with no jaggies or jerkies.

  Here’s my workflow for using plugin Twixtor (can use timewarp), Algolith- (can use

  fieldskit)

  1. Deinterlace with fieldskit motion estimated blend, fill method blend. or Algolith

  deinterlace with antialiasing. Algolith looks 100% original. It’s the best.( you could

  precomp this step or render out beforehand)

  2. add new comp -comp1 29.97 and new solid and drop in 29.97p footage below solid.

  3. set solid visible on and footage visible off, footage sound off.

  4. set twixtor color source to solid and drag solid longer than footage below it a bit
  because we’re going to slow it down and need more artificial room.

  5. twixtor speed 98.75 % (speed diff of 29.97 to 23.976) Motion blur ammount is up to you.

  0.2 is 180 shutter equavalent.

  6. create new comp -output-23.976 fps

  7. drag comp1 into 23.976 comp and drag 29.97p footage from project bin into it.

  8. right click-time->timestretch the precomped comp1 to 98.75.(equal to slow down from

  twixtor but now film speed sampled temporally at 24 and synced up) don’t use frame

  blending, we just want a fps change.

  9. enable visible comp1 and disable visible footage but footage audio on

  10. enable time remapping for footage audio -out comp (it should snap to end video frame although even beforehand should only be a fraction of a frame off anyway. (This confirms your video FPS transfer. ) This step will enable frame accurate sound sync down to 1/1000th/sec.

  11. render out fields(off) at 23.976 or add 3:2 pulldown. Its ready for DVD.

  It will look so good, yu’ll swear its 30p at first until you realize its nicer, its film

  speed with no jerky motion or weird lines. Take that DVX 100A.

  Chris Wright replied 17 years, 10 months ago 1 Member · 1 Reply
• 1 Reply

• 

  Chris Wright

  June 28, 2008 at 11:56 pm

  Timewarp instead of Twixtor uses same principle to extend longer footage but goes about it slightly different to get 23.976p

  1. You need to make a comp with de-interlaced footage and then sub-comp that in another comp-“effect_add”. Now you can access the longer, slower clip.

  2. Apply Timewarp to “effect_add” comp to 98.75 with extreme filter.

  2. Drag “effect_add” comp into new “resynced” comp and timestretch to 98.75. no sound

  3. add original footage as just sound to “resynced” comp and enable timeremapping for frame accurate sync.

Reply to this Discussion! Login or Sign Up