Bangla AI Auto-Caption Video Editor (Python Script) — Free

Description

Stop typing captions by hand.

I built this for my own YouTube tutorials after Canva gave me low-quality exports and CapCut made me manually type every caption, hook, and CTA — with the good features locked behind Pro. So I automated the whole thing with Python and AI.

This free script:

✅ Auto-detects the spoken language (Bangla or English) using OpenAI Whisper
✅ Auto-transcribes your full video with word-level timestamps
✅ Generates an editable subtitle file so you can fix any misheard word before rendering
✅ Burns captions with CORRECT Bangla letter shaping (most tools break Bengali conjuncts — this one doesn’t, using HarfBuzz + FreeType text shaping)
✅ Adds hook text at the start and a CTA at the end automatically
✅ GPU-accelerated rendering (NVIDIA NVENC) with automatic CPU fallback
✅ 100% free, no watermark, no subscription, no Pro tier

What you get:
— Full Python source code (auto_edit_multilang.py)
— requirements.txt for one-command setup
— README with install steps + minimum PC requirements
— A troubleshooting guide covering every real error I hit while building this

Requires: Python 3.10+, ffmpeg. Works without a GPU too (just slower).

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If this saves you hours of manual caption typing, you’ll love my premium tools built the same way — fully automated, no manual busywork. Check out my AI LinkedIn Comment Generator Chrome Extension (free Lite + Premium tiers) on my profile, built for freelancers and creators who want to grow without doing everything by hand.

Built by Tanvir — Python & AI freelancer, teacher, and YouTuber helping Bangla creators automate their workflow.