SILENCE_COPY      261 libavfilter/af_silenceremove.c         s->mode = SILENCE_COPY;
SILENCE_COPY      438 libavfilter/af_silenceremove.c             s->mode = SILENCE_COPY;
SILENCE_COPY      443 libavfilter/af_silenceremove.c     case SILENCE_COPY:
SILENCE_COPY      566 libavfilter/af_silenceremove.c             s->mode = SILENCE_COPY;
SILENCE_COPY      588 libavfilter/af_silenceremove.c                                s->mode == SILENCE_COPY)) {