Procs

proc av_gettime(): int64 {.importc, cdecl, ...raises: [], tags: [], forbids: [].}

proc av_gettime_relative(): int64 {.importc, cdecl, ...raises: [], tags: [],
                                    forbids: [].}

proc av_gettime_relative_is_monotonic(): cint {.importc, cdecl, ...raises: [],
    tags: [], forbids: [].}

proc av_usleep(usec: cuint): cint {.importc, cdecl, ...raises: [], tags: [],
                                    forbids: [].}