Inside Macintosh: QuickTime /

Chapter 2 - Movie Toolbox / Movie Toolbox Reference

Time Base Functions / Working With Time Base Values

GetTimeBaseStartTime

You can determine the start time of a time base by calling the GetTimeBaseStartTime function.

pascal TimeValue GetTimeBaseStartTime (TimeBase tb, TimeScale s,
                                        TimeRecord *tr);

tb

Specifies the time base for this operation. Your application obtains this time base identifier from the NewTimeBase function (described on page 2-297).

s

Specifies the time scale in which to return the start time.

tr

Contains a pointer to a time structure that is to receive the start time. This is an optional parameter. If you do not want the time value represented in a time structure, set this parameter to nil.

DESCRIPTION

The GetTimeBaseStartTime returns a time value that contains the start time
from the specified time base in the specified time scale. The function returns this value even if you specify a time structure with the tr parameter.

ERROR CODES

None

SEE ALSO

You can set the start time of a time base by calling the SetTimeBaseStartTime function, which is described in the previous section.