H.264/H.265/AV1 Parameter Tuning for Practical Compression

Profiles/levels for compatibility, B‑frames and reference frames, presets/tunes (film, grain), and sensible key‑int settings for streaming and editing.

CTU sizes, presets, strong compression at high resolutions, hardware decode considerations on older devices, and HDR signaling basics.

Encoder speed levels, tile usage, film/grain synthesis, current hardware support realities, and when AV1 is worth the extra time.

CRF vs two‑pass targets, VBV/HRD constraints to limit peaks, and how to avoid buffering or platform rejections.

Favor H.264 for broad playback; verify H.265/AV1 support on target platforms; provide fallbacks where needed.

Web 1080p: H.264 CRF ~22, reasonable preset; 4K archive: H.265 two‑pass with target bitrate; social clips: AV1 with moderate speed preset for size savings.

Open Vibbit Video Compressor and apply tuned parameters to a sample: /tools/video-compress

Video compression methods: CRF, bitrate, resize

Two‑pass vs. CRF