TIMECODE (Compact 2013)

  • Article

3/26/2014

This structure contains basic timecode frame count information.

Syntax

typedef struct tagTIMECODE {
  WORD wFrameRate;
  WORD wFrameFract;
  WORD dwFrames;
}TIMECODE;

Members

  • wFrameRate
    Number of frames per second. Specify with one of the following values.

    Value

    Description

    ED_FORMAT_SMPTE_30

    30 frames per second.

    ED_FORMAT_SMPTE_30DROP

    30 frames per second drop frame (actual rate 29.97 fps).

    ED_FORMAT_SMPTE_25

    25 frames per second.

    ED_FORMAT_SMPTE_24

    24 frames per second.
  • wFrameFract
    Fractional frame. Full scale is 0x1000.
  • dwFrames
    Timecode value as a binary framecount.

Remarks

Fractional frame can be used to indicate temporal offset into frame when timecode was actually read from an external device; for example, wFrameFract=0x7ff means the timecode value was read from the device at the end of the first video field.

Note

Because timecode commonly enters or leaves computer systems as ASCII values, conversion helper methods that convert the ASCII values to and from binary framecounts are supplied in the sample filter.

Requirements

Header

dshow.h

Library

Strmiids.lib

See Also

Reference

DirectShow Structures