id	summary	reporter	owner	description	type	status	priority	component	version	resolution	keywords	cc	blockedby	blocking	reproduced	analyzed
1023	High frequency audio	ryback3		"I'm trying to join an audio file to video file, this audio file test.m4a has some high frequency audio(15000hz) when i join this sound with command :

ffmpeg -i video.mp4 -i test.m4a -vcodec copy -acodec copy  output.mp4

it mixes audio and video successfully but it removes high frequency audios in this audio, i can get other audio but cannot get high frequency audio. Audio file has sample rate 44100hz "	defect	closed	normal	undetermined	unspecified	needs_more_info					0	0