Fast Motion and Slow Motion Lip Sync For Music Video

Summary of video (Fast Motion / Slow Motion Lip Sync for Music Videos)

Tyler Casey (music video director) explains how to create lip-sync-friendly slow motion (“slown down”) and speeded-up (“sped up”) effects for music videos by manipulating playback speed in Premiere Pro and matching camera frame rates during shooting.

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1) Slow-down / “Slown down” effect (slow audio, slow performance, slow visuals)

Concept

Slow the audio track in post, then record video at a higher frame rate so the final playback looks slow while keeping lip movements synced.

Steps / settings (Premiere Pro)

• Import the artist’s audio into Adobe Premiere Pro
• Right-click the audio track → Speed/Duration
• Change speed to:
  • 150% or 200% (based on how fast the artist performs)
• Enable Maintain Audio Pitch
• Export the processed audio as a simple MP3

Frame rate guidance for recording

Record at:

• 36 fps for the 150% case
• 48 fps for the 200% case

Rationale (as described): the speed change corresponds to how the playback frame rate should scale (e.g., 150% relates to “half” adjustments compared to 24 fps; 200% relates to another half step).

Camera recommendations mentioned

• Panasonic GH5 / GH4: supports variable frame rates on-camera (example frame rates like 36/48)
• RED cameras: can set/enter exact frame rates during recording
• Sony: unclear/not confirmed whether the same frame-rate setup is possible

Synchronization notes

• No slow-motion audio during recording: you must sync the slowed audio to the lip movements
• Ensure timing matches when the song starts and ends, since audio won’t automatically align during slow-motion capture

Creative usage

• Works best during certain emotional moments in the song
• Example: slowing down hand movements dramatically
• Often becomes more noticeable when combined with:
  • background performers
  • lighting changes / multiple lighting sources

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2) Speed-up / “Sped up” version (slow audio performance, then speed up footage)

Concept

To create faster, intense motion while keeping lip sync believable:

1. Create a slowed audio version
2. Perform while filming at 24 fps at a slower pace
3. Then speed up the footage in Premiere to match the original song timing (making it look “hyped” and intense)

Steps / settings (Premiere Pro audio first)

• Right-click the audio clip → Speed/Duration
• Choose a slowdown amount:
  • as high as 50%
  • or subtler settings like 85 / 75 / 65
• Goal: make the artist perform slowly enough that lips match when sped up later

Filming approach

• Film at 24 fps
• Have the artist perform slowly to the slowed track:
  • hand/body motions match the slowed performance timing
  • lips must also be slow (the speaker notes this is “tricky”)
• Capture multiple takes to get the performance right

Math + frame-rate/interpretation trick to re-speed in Premiere

After importing into Premiere:

• Compute the new playback frame rate so the clip speeds up correctly.
• Example given:
  • If slowed audio to 50%
  • Compute: 23.976 / 50 × 100
  • Apply it via:
    • Right-click video clip → Modify → Interpret Footage
    • Set the calculated frame rate value

Why this method can be easier (audio perspective)

• The sped-up version keeps audio in place, making it easier to sing/sync
• Once synced, the motion can feel intense

Creative usage / feel

• Can be adjusted for intensity:
  • subtle (for a “kick”)
  • stronger hype (for exaggerated effects)
• Emphasizes exaggerated:
  • camera movement
  • body movement
  • background motion/people

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Sources / Main speaker

• Tyler Casey — music video director (main speaker)