av_log_ask_for_sample 1970 ffmpeg.c                   av_log_ask_for_sample(
av_log_ask_for_sample 3528 libavcodec/utils.c         av_log_ask_for_sample(avc, NULL);
av_log_ask_for_sample  542 libavformat/isom.c         av_log_ask_for_sample(s, "Unimplemented container channel layout.\n");