IG_mult_frame_image

IG_mult_frame_image_get

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This function retrieves the HIGEAR of the given frame's image.

Declaration:

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AT_ERRCOUNT ACCUAPI IG_mult_frame_image_get( HIGMULT hMult, AT_UINT frameNum, LPHIGEAR lphIGear );

Arguments:

Name	Type	Description
hMult	HIGMULT	Multimedia instance handle.
frameNum	AT_UINT	Frame number to get image for (0 = first frame).
lphIGear	LPHIGEAR	Image handle.

Return Value:

Returns the number of ImageGear errors that occurred during this function call. If there are no errors, the return value is IGE_SUCCESS.

Supported Raster Image Formats:

This function does not process image pixels.

Sample:

Media Player

Example:

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/* Saves first frame as a 128-pixel-wide thumbnail / AT_ERRCOUNT nErrcount; / Number of errors on stack / HIGMULT hMult; / Multimedia instance handle / HIGEAR hIGear; / HIGEAR handle of image / HIGEAR hIGearCopy; / HIGEAR handle of duplicate / AT_DIMENSION w, h; / Width and height of image / nErrcount = IG_mult_current_frame_reset(hMult); nErrcount = IG_mult_current_frame_image_get(hMult, &hIGear); nErrcount = IG_image_duplicate(hIGear, &hIGearCopy); nErrcount = IG_image_dimensions_get(hIGearCopy, &w, &h, NULL); nErrcount = IG_IP_resize(hIGearCopy, 128, (AT_DIMENSION) ((float) h / (float) w 128), IG_INTERPOLATION_BICUBIC); nErrcount = IG_save_file(hIGearCopy, "thumb.jpg", IG_SAVE_JPG); nErrcount = IG_image_delete(hIGearCopy);

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/* Saves first frame as a 128-pixel-wide thumbnail */
AT_ERRCOUNT nErrcount;  /* Number of errors on stack */
HIGMULT hMult;          /* Multimedia instance handle */
HIGEAR hIGear;          /* HIGEAR handle of image */
HIGEAR hIGearCopy;      /* HIGEAR handle of duplicate */
AT_DIMENSION w, h;      /* Width and height of image */
nErrcount = IG_mult_current_frame_reset(hMult);
nErrcount = IG_mult_current_frame_image_get(hMult, &hIGear);
nErrcount = IG_image_duplicate(hIGear, &hIGearCopy);
nErrcount = IG_image_dimensions_get(hIGearCopy, &w, &h, NULL);
nErrcount = IG_IP_resize(hIGearCopy, 128, (AT_DIMENSION) ((float) h / (float) w * 128),
IG_INTERPOLATION_BICUBIC);
nErrcount = IG_save_file(hIGearCopy, "thumb.jpg", IG_SAVE_JPG);
nErrcount = IG_image_delete(hIGearCopy);

Remarks:

This image is owned by ImageGear. You can perform read-only operations such as display or save to a file, but do not attempt to free or alter the image. If you need to alter the image (resize it, for example), use IG_image_duplicate() to make a copy of the image, work with the copy, and free it with IG_image_delete() when finished.

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