HIKVISION DS-4 Series - 5.1.17. HWStopCapFile(); 5.1.18. HWGetPictureSize(); 5.1.19. HWGetYV12 Image(); 5.1.20. HWConvertToBmpFile()

Technical Manual
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hChannel channel handler；
nSpeed the speed for decoding
5.1.23. int HW_SetPlayPos(int hChannel,ULONG nPos);
Explanation:
Set the position to decode
Parameter:
hChannel channel handler；
nPos the percent of the file length (0 – 100)
5.1.24. int HW_GetPlayPos(int hChannel,ULONG* pPos);
Explanation:
Get the position that now decoding
Parameter:
hChannel channel handler；
*pPos the percent of the file (0 ~ 100)
5.1.25. int HW_SetJumpInterval(int hChannel,ULONG nSecond);
Explanation:
Set the interval to jump
Parameter:
hChannel channel handler;
nSecond the interval as second
5.1.26. int HW_Jump(int hChannel,ULONG nDirection);
Explanation:
Set the direction for jumping；
Parameter:
hChannel channel handler；
nDirection JUMP_FORWARD: forward；
JUMP_BACKWARD: back；
5.1.27. int HW_GetVersion(PHW_VERSION pVersion);
Explanation:
Get the information for the version
Parameter:
pVersion information, describe as follow
typedef struct {
ULONG DspVersion, DspBuildNum;
ULONG DriverVersion, DriverBuildNum;
ULONG SDKVersion, SDKBuildNum;
}HW_VERSION, *PHW_VERSION;