reels-pipelinelisted

# Reels Pipeline Raw 16:9 → polished 9:16 in one pass. ## When to use - User has a single source clip (gameplay, screen recording, talking head). - Target is IG Reels / YT Shorts / TikTok (1080×1920, ≤ 90s). - User wants captions burned in (better retention than IG's auto-captions). ## Pipeline stages ``` input.mp4 (16:9) ↓ 1. trim to hook + body + payoff (≤ 60s) ↓ 2. crop or pad to 9:16 ↓ 3. mix BGM at -18 LUFS under voice ↓ 4. burn captions (SRT → ass with style) ↓ 5. prepend 1.5s hook frame (text + freeze) ↓ 6. append 2s end card (handle + CTA) ↓ 7. encode H.264 + AAC, ≤ 100 MB output.mp4 ``` ## Reference FFmpeg command (single pass) ```bash ffmpeg -i input.mp4 -i bgm.mp3 -i hook.png -i end.png \ -filter_complex "\ [0:v]crop=ih*9/16:ih,scale=1080:1920,setsar=1[main]; \ [2:v]scale=1080:1920[hook]; [3:v]scale=1080:1920[end]; \ [hook][main][end]concat=n=3:v=1:a=0[v]; \ [0:a]volume=1.0[a0]; [1:a]volume=0.25[a1]; \ [a0][a1]amix=inputs=2:duration=first[a]; \ [v]subtitles=captions.ass[vout]" \ -map "[vout]" -map "[a]" \ -c:v libx264 -preset medium -crf 21 \ -c:a aac -b:a 128k -ar 44100 \ -movflags +faststart \ -t 60 output.mp4 ``` ## Captions style (.ass) - Font: Inter Bold, size 64 - Outline: 4px black, no shadow - Position: lower-third (PlayResY=1920, MarginV=240) - Max 2 lines, 18 chars/line, 1.2s min display ## Hook frame design The first 1.5 seconds decide retention. Keep these rules: - One big text claim, m