ff_xvid_rate_estimate_qscale  683 libavcodec/ratecontrol.c         return ff_xvid_rate_estimate_qscale(s, dry_run);
ff_xvid_rate_estimate_qscale  102 libavcodec/ratecontrol.h float ff_xvid_rate_estimate_qscale(struct MpegEncContext *s, int dry_run);