ffmpeg-synth

Generate synthetic test media for video pipeline validation by using FFmpeg lavfi sources like testsrc or sine to produce deterministic streams. This Skill provides a Python wrapper to assemble lavfi input graphs, creating synchronized video and audio clips for automated QA.

Create SMPTE color bars with a 1 kHz tone for broadcast calibration using lavfi sources. The Skill outputs synchronized video and audio streams, providing ready-to-run recipes to produce standard line-up media for broadcast workflows.

Available FFmpeg lavfi sources for encoder stress testing and LUT authoring include testsrc, testsrc2, rgbtestsrc, yuvtestsrc, mandelbrot, gradients, color, sine, anullsrc, and anoisesrc. These sources generate deterministic synthetic media sequences for pipeline testing.

Synthetic media generation requires FFmpeg built with lavfi support to use the virtual input sources. The included Python wrapper script assembles the lavfi input graphs and ensures all generated outputs are bounded with duration limits.

Ensure generated synthetic media clips have a bounded duration by applying the -t flag or duration parameter in the output graph. The Skill's Python wrapper automatically enforces these limits, preventing unbounded lavfi source generation during automated QA testing.

Use FFmpeg lavfi sources instead of real media files for ABX testing and pipeline calibration because they provide deterministic, reproducible synthetic media without requiring source assets. This approach guarantees consistent test patterns for accurate encoder validation and comparison.