Add a sound recording to (film or video footage) at a later time.
为（电影，录像胶片）配音
with all that noise I shall have to post-synch everything
Example sentencesExamples
It was shot silently with dialogue spoken in Italian by non-professionals (the men played themselves) with the intention of post-synching English dialogue.
Dateline fleshes out the political background with a concise post-synched commentary; this works well, and does not detract from some stunning documentary film-making.
It was and remains cheaper to shoot without synch-sound in acoustically problematic locations (downtown streets and hotel rooms) and later post-synch all the dialogue.
Definition of post-synch in US English:
post-synch
verbpōstˈsiNGk
[with object]
Add a sound recording to (film or video footage) at a later time.
为（电影，录像胶片）配音
with all that noise I shall have to post-synch everything
Example sentencesExamples
It was shot silently with dialogue spoken in Italian by non-professionals (the men played themselves) with the intention of post-synching English dialogue.
It was and remains cheaper to shoot without synch-sound in acoustically problematic locations (downtown streets and hotel rooms) and later post-synch all the dialogue.
Dateline fleshes out the political background with a concise post-synched commentary; this works well, and does not detract from some stunning documentary film-making.