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FFGear API

FFGear Functional Block Diagram
FFGear API's generalized workflow

Overview

FFGear is a multi-threaded , high-performance âš¡ wrapper around DeFFcode's FFdecoder API that compiles and executes an FFmpeg pipeline inside a subprocess pipe for generating real-time, low-overhead, lightning-fast decoded video frames in Python.

FFGear API provides direct, transparent access to the full FFdecoder feature-set, including:

  • Hardware-Accelerated Decoding — GPU-powered decoding with CUDA/CUVID and other hardware-accelerated backends âš¡
  • Flexible Pixel Formats — support for any FFmpeg pixel format (e.g., bgr24, yuv420p, gray) with optional OpenCV compatibility patches for YUV/NV layouts.
  • Per-Frame Metadata Extraction — asynchronous frame metadata extraction through the showinfo filter.
  • Live Complex Filtergraphs — support for live simple and complex FFmpeg filter pipelines.
  • Multi-Input Sources — multiple simultaneous inputs routed via -map or -filter_complex.
  • Wide Source Support — capture USB, virtual, and IP camera feeds by index similar to OpenCV, along with support for multimedia files, image sequences, desktop screen capture, and network streams (HTTP(s), RTSP/RTP, etc.).

Internally, FFGear employs the Threaded Queue mode (configurable via QUEUE_SIZE, THREADED_QUEUE_MODE, THREAD_TIMEOUT) for zero-bottleneck asynchronous frame delivery, and maintains the standard OpenCV-Python coding syntax for drop-in integration.

Similar to CamGear, FFGear also supports the yt_dlp backend for seamlessly pipelining live video frames from streaming services like YouTube, Twitch, and many more ➶

 

FFGear requires the deffcode library

FFGear API MUST have the deffcode library installed, along with a valid FFmpeg executable. Any failure in detection will raise ImportError/RuntimeError immediately.

Install via pip:

pip install deffcode

For FFmpeg installation, see FFmpeg Installation ➶

Helpful Tips

  • Enable logging=True on the first run to easily identify any runtime errors.

  • FFGear follows the same .start() → .read() → .stop() pattern as CamGear — it's a drop-in upgrade for FFmpeg-powered sources.

  • Use ytv_metadata class variable to retrieve streaming video metadata when using stream_mode=True.

 

Usage Examples

After going through FFGear Usage Examples, Checkout more of its advanced configurations here ➶

Parameters

References