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");