duration_in_seconds()

audmath.duration_in_seconds(duration, sampling_rate=None)

Duration in seconds.

Converts the given duration value to seconds. A unit can be provided when duration is given as a string. As units the following values are possible.

Unit	Meaning
W	week
D, days, day	day
h, hours, hour, hr	hour
m, minutes, minute, min, T	minute
s, seconds, second, sec, S	second
ms, milliseconds, millisecond, millis, milli, L	millisecond
us, μs, microseconds, microsecond, micros, micro, U	microsecond
ns, nanoseconds, nanoseconds, nanos, nano, N	nanosecond

Parameters

• duration (UnionType[float, int, str, timedelta64, None]) – if duration is a float, integer or string without unit it is treated as seconds or if sampling_rate is provided as samples. If duration is provided as a string with unit, e.g. '2ms' or '2 ms', or as a numpy.timedelta64 or pandas.Timedelta object it will be converted to seconds and sampling_rate is always ignored. If duration is None, numpy.nan, pandas.NA, pandas.NaT, '', 'None', 'NaN', 'NaT', or any other lower/mixed case version of those strings numpy.nan is returned. If duration is numpy.inf, 'Inf' or any other lower/mixed case version of that string numpy.inf is returned, and -numpy.inf for the negative case

• sampling_rate (UnionType[float, int, None]) – sampling rate in Hz. Is ignored if duration is provided with a unit

Return type

floating

Returns

duration in seconds

Raises

• ValueError – if the provided unit is not supported

• ValueError – if duration is a string that does not match a valid ‘<value><unit>’ pattern

Examples

>>> duration_in_seconds(2)
np.float64(2.0)
>>> duration_in_seconds(2.0)
np.float64(2.0)
>>> duration_in_seconds("2")
np.float64(2.0)
>>> duration_in_seconds("2ms")
np.float64(0.002)
>>> duration_in_seconds("2 ms")
np.float64(0.002)
>>> duration_in_seconds("ms")
np.float64(0.001)
>>> duration_in_seconds(2000, sampling_rate=1000)
np.float64(2.0)
>>> duration_in_seconds(np.timedelta64(2, "s"))
np.float64(2.0)
>>> duration_in_seconds(pd.to_timedelta(2, "s"))
np.float64(2.0)
>>> duration_in_seconds("Inf")
inf
>>> duration_in_seconds(None)
nan