# Matches FFMpeg metadata
^\s{4,}                              # Metadata can occur on any line, as long as there are at least four spaces at the start
(?<Key>[^\s\:]+)?                    # It may contain a key
\s{0,}                               # Followed by optional whitespace and a colon
\:\s{1,}                             # Ignore leading whitespace
(?<Value>(?:.|\s){0,}?(?=\z|[\n\r])) # Anything until the end of the line is the value

