| Text→image | JPEG/PNG/WebP exact px | Match video hop's resolution | N/A | Send exact width/height | Yes |
| Image→video | MP4, 16–20s (max 120s) | sora-2/-pro, ≤6 extensions | 1 hour (download URL) | Sora ends Sep 24, 2026 | Yes |
| Text→speech | PCM/WAV 44.1–48kHz | Pro tier+ (Creator+ for mp3) | N/A | Free tier: lossy MP3 128kbps | No |
| Audio→transcript | mp3/wav/m4a ≤25MB | chunking_strategy=auto | N/A | AssemblyAI: 5GB/10h files | Yes |
| Transcript→clips | SRT/VTT + timestamps | whisper-1 only | N/A | Keep whisper-1 for captions | Yes |
| Render→publish | MP4 moov-front, -16 LKFS | YouTube & Apple specs | N/A | Precondition loudness first | Yes |
Expiry is N/A except Sora, whose download URLs lapse in 1 hour; 'Free tier?' flags contracts a no-cost plan cannot satisfy.