Quality- & Speed-Features Table of Content Quality Features Required Unique Speed Features Quality Features Required Quality features that are required for to reach parity with state-of-the-art encoders. Feature rav1e libaom x264 x265 Exact RDO ✔️ ✔️ ✔️ ✔️ Temporal RDO ✔️ ✔️ ✔️ (mbtree) ✔️ Smart distortion ✔️ ❌ (non default) ✔️ (psyrd) ✔️ Automatic QM ❌ ❌ ❌ ✔️ Rational luma/chroma weight ✔️ ❌ ✔️ ✔️ B-pyramid ✔️ ✔️ ✔️ ✔️ Unique Quality features where rav1e can go beyond state-of-the-art encoders. Feature rav1e libaom x264 x265 Joint loop filter search ✔️ ❌ ❌ ❌ Chunk-compatible first pass ✔️ ❌ (aom-av2) ❌ ❌ (in UHDKit) Speed Features Feature rav1e libaom x264 x265 Pruning using approximate RDO ✔️ ✔️ ✔️ ✔️ Frame-parallel encoding ❌ ✔️ ✔️ ✔️ Model-based RDO cost ❌ ❌ (non default) ✔️ ?