I would like to merge a flv with mp3 without touching / removing flv audio stream using ffmpeg in php. I tried many commands and none helps. Here is the command I am using now.
/usr/bin/ffmpeg -i "4bpCRRV82x.flv"-i "Someday.mp3" -vcodec libx264 -shortest "output.mp4"
But it replaces flv audio with the mp3 inputting. Any help and suggestions will be highly appreciable. Thanks.