- Add -n/--process-name flag to set ffmpeg argv[0] alias (exec -a equivalent)
- Show real-time per-file progress via ffmpeg -progress pipe:1
- Use slot queue to manage per-worker tqdm bars (position 1..N)
- Add -pix_fmt yuv420p10le for 10-bit output
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>