turtle-options

Parse a scaling option in different ways. You can specify a size (480x320), a width (480x) or a height (x320) or a percentage (50% or 0.5, needs to be positive).

Quality

Parse a quality option. This can be a percentage or a keyword (verylow, low, mediumlow, medium, mediumhigh, high, best). The keywords are mapped to a percentage according to the following table:

Keyword	Percentage
verylow	10%
low	20%
mediumlow	35%
medium	50%
mediumhigh	65%
high	80%
veryhigh	90%
best	100%

Timecode

Parse a timecode. A timecode is made of a number of hours, minutes, seconds and milliseconds. The time code can be given in different formats. You don’t have to give a number of seconds or minutes inferior to 60. For example if you give 75 minutes, it will be interpreted as 1 hour and 15 minutes. You can also provide a number of milliseconds superior to 1000. The only required number is the number of seconds. The following table gives examples of valid timecodes and how they are interpreted:

Timecode	Result
3	3 secs
75	1 min 15 secs
17:12	17 mins 12 secs
80:23	1 hour 20 mins 23 secs
54:32:10	54 hours 32 mins 10 secs
43.7	43 secs 700 millisecs
4:13.85	4 mins 13 secs 850 millisecs
7:4:13.437	7 hours 4 mins 13 secs 437 millisecs
5.2150	7 secs 150 milliseconds

You can also use the 00h00m00s000 format if you prefer. The same rules apply:

1h34m12s345 gives 1 hour 34 mins 12 secs and 345 millisecs

A timecode can be negative:

-3:45 (or -3m45) gives minus 3 mins and 45 secs