Short recommendation
Use ElevenLabs for batch TTS (voice clone or a high-quality studio voice), force-align the original transcripts to get word/timestamp anchors, generate time-controlled TTS via SSML breaks or API batch jobs, then apply a lip-sync tool tuned to live faces (Flawless or D-ID) or do manual frame-level fixes in Premiere/After Effects. Export deliverables as 48 kHz WAV + H.264/ProRes video. This balances speed, quality, and scale for 200 titles.

Decision criteria (pick your path)
- Budget: pro dubbing (Flawless/D-ID + human QC) costs more; Descript+ElevenLabs is midcost; pure API+manual edit is cheapest.
- Skill level: developers comfortable with APIs + alignment should use ElevenLabs API + Montreal Forced Aligner; editors prefer Descript/Premiere pipeline.
- Team size & throughput: a small team should automate alignment + batch TTS; large teams can parallelize manual QC.
- Output quality required: choose professional lip-sync services for on-camera talent vs. simple audio replacement for voice-over style.

Step-by-step (practical)
1) Inventory & source files
- Create a CSV with video ID, duration, language, speaker name, original audio path, desired voice.
2) Transcribe & clean scripts
- Get transcripts (auto-STT then human-clean). Use ChatGPT if you want fast grammar/style normalization of scripts.
3) Get timestamps (critical for lip-sync)
- Run a forced-aligner (Gentle or Montreal Forced Aligner) against original audio to get word-level timestamps. Save as JSON/CUE.
4) Choose voice approach in ElevenLabs
- Use a prebuilt ElevenLabs voice or create a voice clone (with consent) for host continuity. Test samples for prosody and cadence.
5) Produce TTS with timing control
- Use ElevenLabs batch API to generate audio files. To match lip movement, inject SSML tags or silence padding to match original word timestamps. Iterate small samples to dial prosody.
6) Lip-sync / face retargeting
- For the highest fidelity: run audio + original video through a lip-sync service (Flawless AI or D-ID) that remaps mouth motion to the new audio.
- Mid/low budget: import new audio into Premiere/After Effects, use frame-level cuts, minor speed ramps, and manual mouth frame PCR for close-ups.
7) Batch export and QC
- Automate render queue (Media Encoder/ffmpeg) and perform spot checks: alignment, prosody, lip offset, and sync drift.

Export formats (recommended)
- Master video: ProRes 422 HQ (MXF .mov) or DNxHR, audio embedded as 48 kHz 24-bit WAV. Good for archiving and re-edit.
- Delivery web: H.264 MP4, 1080p/4K, AAC 192–256 kbps, video bitrates per platform.
- Audio-only: 48 kHz WAV or FLAC for reuse.

Checklist (before final render)
- [ ] Script cleaned and approved
- [ ] Voice model selected and consent completed
- [ ] Timestamps aligned to original audio
- [ ] TTS generation batch complete (naming consistent)
- [ ] Lip-sync pass (auto or manual) complete
- [ ] Spot-checks across random samples (10% of videos)
- [ ] Exports in master and delivery formats

Best-for / Avoid-if
- Best for: large-volume localization/dubbing when you need consistent host voice across many videos.
- Avoid if: you require actor-perfect mouth micro-expressions (use full human re-dub + manual retakes instead).

Notes
- For 200 videos, automate as much as possible (alignment + batch TTS + scripted exports). Budget and desired output quality will mainly drive whether you add a pro lip-sync service or manual editorial time.

If you want, I can draft the CSV naming scheme, sample SSML snippets to match timing, or a small Node/Python script for batch ElevenLabs API calls.

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