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