[gst-devel] gstreamer gstbasetransform

[Federico Paganini]

Hi,


I briefly explain to you my problem. For my thesis i am developing a gstreamer plug-in that encrypt an mpeg4 video with DES in CBC mode. The encryption is made frame by frame and because a frame doesn't contain an exact number of DES BLOCK SIZE(64 bit) i must padding the final bytes of the frame. Because i use padding the dimension of the frame in output is greater than that in input. For this reason i must allocate an output buffer of a precise size. So in the trasform function of my plug in i have tried to call this function: gst_base_transform_prepare_output_buffer( base, inbuf, newSize, inbuf->caps,&outbuf ); but when i try to compile i have this error:error: implicit declaration of function ‘gst_base_transform_prepare_output_buffer’ nevertheless i have done the include of gstbasetransform.h.
I would be very happy if you can say to me how i must to  allocate an output buffer that is larger than input.

thanks

Best regards
 		 	   		  
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