The libavcodec paths (Linux NVENC, VAAPI, Windows QSV) each re-parsed
PUNKTFUNK_VBV_FRAMES locally in f32, duplicating and diverging in precision from
the f64 vbv_frames_env() helper the direct-NVENC/AMF paths already use. Now that
the helper lives in encode/codec.rs (532b313b), route all three through
crate::encode::vbv_frames_env(): one parse, one precision, no drift.
Behaviour-identical (same filter finite && > 0, same 1.0 default), f64 not f32.
Verified: Linux cargo check green (linux/mod.rs + vaapi.rs compile); ffmpeg_win.rs
is Windows-cfg and mirrors the amf.rs/nvenc.rs sites already using the helper.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
enricobuehler
abecb5226c