>>101703461
okay, so the command to fix one file (as of this year) is
ffmpeg -f concat -safe 0 -segment_time_metadata 1 -i "filename.temp.mp4.concat" -vf select=concatdec_select -af aselect=concatdec_select,aresample=async=1 "outputfilename.mp4"
Using Bash, how do I automatically do this for all .concat files in a directory?