Hello, Sisir Koppaka wrote: > Hi, > I've seen this being used in many places - MKTAG('X','Y','Z') but I haven't > been able to find out where it is defined. Can someone help me out? > find . -name "*.h" -exec grep -l "MKTAG" {} \; ./libavcodec/avcodec.h ./libavutil/common.h Guillaume