FFSPLIT

FFsplit is a lightweight utility that lets users capture videos from multiple sources and composite them into a live video feed. The feed can be livestreamed and/or recorded locally using FFmpeg, or used as a webcam source using a DirectShow filter. It is distributed as freeware. The utility is highly optimized for performance. It supports features like screen capturing, window capturing, preview popout, and service integrations such as Twitch.tv.

Core Strengths:

• Captures desktop, window, or region screen recordings for streaming or saving locally. 
• Enables live streaming using FFmpeg-based encoding pipeline. 
• Supports multiple video layers and scene composition (picture-in-picture style). 
• Allows virtual camera output for use in other applications. 
• Provides DirectShow-based capture filters for external integration. 
• Includes local recording and live broadcast in one workflow. 
• Offers hotkey-based control for fast streaming actions. 
• Supports RTMP streaming to platforms like Twitch and YouTube (legacy support). 
• Designed as a lightweight utility optimized for low system usage. 
• Completely free to use (freeware model).

Detailed Insights:

• User selects a capture source (screen, window, or region).
• FFsplit processes video using FFmpeg encoding.
• Scenes can include multiple layers (camera, screen, images).
• Output can be streamed live or recorded locally.
• Virtual camera output allows use in external apps.
• RTMP settings enable streaming to supported platforms.
• Hotkeys control start/stop streaming and scene switching