Sensoray 812 Windows - Manual (Page 17)

strmidx
channel index (0-7)
Returns
0 on success, negative value if error (see mid812types.h for error codes list).
MID812_API int S812_StartPreviewAndRecordW(
wchar_t *fileName,
int devid,
int strmidx
);
Same as S812_StartPreviewAndRecord, but uses widechar or Unicode filenames.
MID812_API int S812_SnapshotToFile(
char *filename,
int filetype,
int qual,
int devid,
int strmidx
);
Takes a snapshot and save to file in filename. This function only applies when streaming video
using S812_StartPreview, S812_StartRecord or S812_StartPreviewAndRecord
Parameters
filename
fully qualified file with path (without extension, extension will be added by the SDK).
filetype
file type to save. MID812_FILE_JPEG and/or MID812_FILE_BMP.
devid
device id in the system (use 0 with a single board installed).
strmidx
channel index (0-7)
Returns
0 on success, negative value if error (see mid812types.h for error codes list).
17