ffmpeg options

prepareDemuxers.sh

#!/bin/bash

# there are FFmpeg_fixing/build and FFmpeg_fixing/src folders
# $ cd FFmpeg_fixing/build/
# $ ../src/configure >> conflog.txt
# copy part of conflog.txt to demuxers.txt 
# since (exclude) "Enabled demuxers:"

cd /home/a/Downloads/myGitHub/FFmpeg_fixing/ffmpeg_config/
rm -f new.txt
# sed -i 1d demuxers.txt # remove first "headers" line
N_eval="awk '{print NF}' demuxers.txt | sort -nu | tail -n 1"
calc_N=`eval $N_eval`
i=1

while [[ i -le "$calc_N" ]]; do
	echo $i
	cmd_str="awk '{print $"$i"}' demuxers.txt >> new.txt"
	eval "$cmd_str"
	((i++))
done

sed -i '/^$/d' new.txt
sed -i 's/^/--disable-demuxer=/' new.txt
sed -i 's/$/ \\/' new.txt