x265 wizard

Generates FFmpeg commands for H.265/HEVC files using the x265 encoder. Only input and output filenames are required.

x265 vs x264: 25–50% better compression at equivalent visual quality, at the cost of slower encoding. Default CRF is 28 (which gives roughly equivalent quality to x264 CRF 23).

Frame-rate presets auto-populate optimized x265 parameters. See the x265 guide for details on what each value does.

10-bit pipelines: set pixel format to yuv420p10le for 4K / HDR content. 10-bit gives noticeably cleaner gradients even on 8-bit displays.

Audio: native FFmpeg AAC or libfdk_aac (higher quality, requires custom build). CBR uses constant bitrate (~192k stereo); VBR uses quality-based encoding.

Time format: in/out points accept time format (1:30, 00:01:30) or seconds (90). Semicolons get converted to colons automatically.

References

• x265 encoder guide
• FFmpeg H.265 encoding guide
• x265 documentation