Ffmpeg Video converter options input field need to be a textarea

I try to add a long options line but the field is to small (60 chars) and anyway is hard to read...

FFmpeg options can be very long so I think is better to use a textarea here.

The options line:

-y -i %videofile -acodec libfaac -ar 44100 -ab %audiobitrate -vcodec libx264 -level 41 -crf 20 -bufsize 20000k -maxrate 25000k -g 250 -r 20 -s %size -coder 1 -flags +loop -cmp +chroma -partitions +parti4x4+partp8x8+partb8x8 -flags2 +brdo+dct8x8+bpyramid -me umh -subq 7 -me_range 16 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -rc_eq 'blurCplx^(1-qComp)' -bf 16 -b_strategy 1 -bidir_refine 1 -refs 6 -deblockalpha 0 -deblockbeta 0 %convertfile