Less fine-grained control with online tools 1. Less fine-grained control with online tools: Customization options can be limited compared to FFmpeg. 2. Full control with PowerShell scripting (with FFmpeg) FFmpeg is extremely powerful and offers a multitude of options for quality, size, bitrate, FPS, cropping, adding filters, and more. You can tailor the conversion precisely to your needs. 3. No data download with FFmpeg: Processing is done locally on your machine, which is ideal for data privacy and security.