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Ultra photorealistic close-up beauty portrait. Long glossy dark hair,
sleek and slightly windswept. Sharp confident expression, direct eye
contact with camera. Defined deep red lip, clean editorial Korean
makeup, luminous skin with real visible texture and pores. Neutral
dark charcoal studio background. Soft key light from front-left with
subtle rim light on the jaw. Shot on 85mm, shallow depth of field,
high detail. No mask, no hat, no accessories, no text, no logo.

High-fashion cinematic music-video still, photorealistic editorial.
<<<ELEMENT_ID>>> stands alone at the centre of a dim modern office
lobby with a wide dark staircase behind her, lit so she is the
brightest figure in frame. She wears a sharp tailored WHITE mini
dress with a structured neckline, white heels, one hand on her hip,
strong confident stance, long glossy dark hair, deep red lip. Behind
and around her on the staircase stand eight young Korean office
workers, all dressed entirely in BLACK: a glossy black cat mask with
pointed ears covering the upper half of the face, a tailored black
blazer, a short black skirt, black tights and black heels. Identical
masks, different hair lengths. Strong graphic contrast between the
single white figure and the black-clad crowd. Moody cinematic
lighting, deep blacks, hard shadows, shallow depth of field, Korean
fashion film look. No text, no logos.

Use @Video1 ONLY for choreography, performer positions, camera
movement, source shot cuts and timing. Rebuild the complete visible
cast from the image references throughout the entire supplied
29-second clip, from its very first frame through its last frame.

@Image1 defines the central lead woman's recognizable face, long
glossy dark hair and deep red lip. Her identity must stay locked and
identical in every frame.

@Image2 defines her fitted WHITE mini dress and white heels, and
defines the surrounding ensemble: young Korean office workers all
dressed entirely in BLACK - a glossy black cat mask with pointed ears
covering the upper half of the face, a tailored black blazer, a short
black skirt, black tights and black heels. @Image2 is also the single
visual reference for the scene's lighting, colour grading, deep blacks
and setting.

Maintain this same cast and photographic look for the whole clip.
Changing camera distance must not change their identities or redesign
the setting. Every ensemble member keeps the same mask and outfit even
when they leave frame and return. Strong graphic contrast between the
single white lead and the black-clad crowd. Photorealistic, no text,
no logos.

ffmpeg -y -ss 0 -t 29 -i 원본.mp4 \
  -c:v libx264 -preset veryfast -crf 20 원본_29s.mp4

ffmpeg -y -i 결과_무음.mp4 -ss 0 -t 29 -i 원본.mp4 \
  -map 0:v:0 -map 1:a:0 \
  -c:v libx264 -profile:v high -level 4.0 -pix_fmt yuv420p \
  -crf 20 -preset medium \
  -c:a aac -ar 44100 -ac 2 -b:a 192k \
  -movflags +faststart -shortest 완성.mp4

ffmpeg -y -ss 0 -t 29 -i 원본.mp4 -i 결과_무음.mp4 \
  -filter_complex "[0:v]scale=720:-2,setsar=1[a];\
[1:v]scale=720:-2,setsar=1[b];[a][b]vstack=inputs=2[v]" \
  -map "[v]" -map 0:a:0 \
  -c:v libx264 -pix_fmt yuv420p -crf 23 -preset medium \
  -c:a aac -b:a 128k -movflags +faststart 비교.mp4