mirror of
https://github.com/calesthio/OpenMontage.git
synced 2026-08-05 15:20:40 +08:00
4c10481011
`_segmented_music` mixed the video's audio with the shaped music via `amix=inputs=2`, whose default `normalize=1` scales every input by 1/inputs (x0.5, -6 dB). Unlike `_mix` and `_full_mix`, this path has no `loudnorm` stage afterward to re-normalize, so the narration was permanently attenuated across the entire timeline — including the stretches where the music volume expression evaluates to 0. A one-second music segment quietly dropped the narration by ~6 dB for the whole video. Add `normalize=0` to the amix: the music is already scaled to `music_volume` by the `volume` expression, so speech passes at unity. Verified with ffmpeg — narration in a no-music region tracks the stereo/aac conversion baseline instead of sitting 6 dB below it.