1. A method of monitoring media presented by a portable media presentation device, comprising: retrieving, by executing an instruction with a processor, a frame tag code from a corresponding frame of the media, the frame tag code associated with the corresponding frame of the media presented by the portable media presentation device, the frame tag code including a frame tag code value that indicates a number of times the frame of the media has been presented via the portable media presentation device; after the corresponding frame of the media has been presented, incrementing, by executing an instruction with the processor, the frame tag code value when a playback-time of the media corresponds to a frame tag code time offset value; and storing, by executing an instruction with the processor, the frame tag code, with the incremented frame tag code value, in the corresponding frame of the media.