TIMECODE
A version of this page is also available for
4/8/2010
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 |
| Windows Embedded CE | Windows CE 2.12 and later |
| Windows Mobile | Windows Mobile Version 5.0 and later |
| Note | Microsoft DirectShow applications and DirectShow filters have different include file and Library requirements For more information, see Setting Up the Build Environment, Version 2.12 requires DXPAK 1.0 or later |