Several of my flac album folders are too loud. I like to lower the volume but maintain the same file name and extension. FFmeg command that lowers the volume is "ffmpeg -i input.flac -filter:a "volume=0.5" output.flac". I am thinking the find command may work with -exec option. Within a folder following gives an error.
find . -type f -iname "*.flac" -exec ffmpeg -i -filter:a "volume=0.5" {} \;
gives an error " -filter-a: protocol not found..."
can someone suggest a solution?, the above ffmpeg command works fine in a single .flac file.