av_oformat_next    88 libavdevice/avdevice.c             if (!(prev = av_oformat_next(prev)))
av_oformat_next  2095 libavformat/avformat.h AVOutputFormat *av_oformat_next(const AVOutputFormat *f);
av_oformat_next    69 libavformat/options.c         while ((ofmt = av_oformat_next(ofmt)))
av_oformat_next    77 libavformat/options.c     while (ofmt = av_oformat_next(ofmt))