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VP9 wizard

Generate FFmpeg commands for VP9 encoding using 2-pass libvpx-vp9

Always read commands before running them. Verify paths and output filenames.

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01SOURCE / OUTPUT

filenames + time range

input -i

output

.webm or .mkv preferred for VP9

in point -ss

optional · accepts hh:mm:ss or seconds

out point -to

optional · accepts hh:mm:ss or seconds

02VIDEO ENCODING

libvpx-vp9 · 2-pass · CRF mode

crf -crf

default 32 · range 0–63 · lower = better quality

keyframe interval -g

optional · GOP size in frames

video filter -vf

optional · e.g. scale=1280:720, crop=1920:800:0:140

03AUDIO

opus by default in webm/mkv

audio bitrate (kb/s)

leave empty or 0 for no audio

04METADATA

webm/mkv · added on second pass only

strip existing metadata first

title

description

comment

date released

05ADVANCED

extra ffmpeg flags

extra options (both passes)

applied to both encoding passes

extra options (2nd pass only)

applied only to the final pass

null output target

Windows (NUL) Linux/macOS (/dev/null)

about · references

Generates FFmpeg commands for high-quality VP9-encoded videos with Opus audio using 2-pass encoding. Outputs to WebM or MKV containers.

Why 2-pass: VP9 benefits significantly from a first analysis pass. The output of the first pass goes to a null target (NUL on Windows, /dev/null elsewhere). Pick the right target above.

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

Metadata: all fields are added only on the second pass. Check "strip existing metadata" to clear source metadata first. Date format is YYYY-MM-DD.

Extra options: the first field applies to both passes, the second only to the final pass. Use these for thread count or extra metadata.

References

$ ffmpeg-command

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