multimedia/x264 20250909 OpenBSD

x264 is a free software library and application for encoding video streams into the H.264/MPEG-4 AVC format.

Encoder features: * 8x8 and 4x4 adaptive spatial transform * Adaptive B-frame placement * B-frames as references / arbitrary frame order * CAVLC/CABAC entropy coding * Custom quantization matrices * Intra: all macroblock types (16x16, 8x8, 4x4, and PCM with all predictions) * Inter P: all partitions (from 16x16 down to 4x4) * Inter B: partitions from 16x16 down to 8x8 (including skip/direct) * Interlacing (MBAFF) * Multiple reference frames * Ratecontrol: constant quantizer, constant quality, single or multipass ABR, optional VBV * Scenecut detection * Spatial and temporal direct mode in B-frames, adaptive mode selection * Parallel encoding on multiple CPUs * Predictive lossless mode * Psy optimizations for detail retention (adaptive quantization, psy-RD, psy-trellis) * Zones for arbitrarily adjusting bitrate distribution