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If a frame has a width or height of zero, this value will make it into libobs/media-io/video-frame.c:video_frame_init and cause linesizes or heights to be zero, which will result in a bmalloc(0) call and OBS will crash. Instead of letting the call stack get that far, check the frame width and height here at the source, log an error, and return early if the frame width or height are zero.