# Different x264 settings ...
ffmpeg -y -f x11grab -r 25 -s 800x800 -i :0.0+0,0 -vcodec libx264 -preset ultrafast lala.mkv
ffmpeg -y -f x11grab -r 25 -s 800x800 -i :0.0+0,0 -vcodec libx264 -preset ultrafast -crf 10  lala.mkv
ffmpeg -y -f x11grab -r 25 -s 800x800 -i :0.0+0,0 -vcodec libx264 -preset ultrafast -crf 1  lala.mkv
ffmpeg -y -f x11grab -r 25 -s 800x800 -i :0.0+0,0 -vcodec libx264 -preset ultrafast -subq 1  lala.mkv
ffmpeg -y -f x11grab -r 25 -s 800x800 -i :0.0+0,0 -vcodec libx264 -preset slow -subq 9  lala.mkv
ffmpeg -y -f x11grab -r 25 -s 800x800 -i :0.0+0,0 -vcodec libx264 -preset fast lala.mkv
ffmpeg -y -f x11grab -r 25 -s 800x800 -i :0.0+0,0 -vcodec libx264 -preset superfast lala.mkv

# Different colorspaces (some worked, some not)
ffmpeg -y -f x11grab -r 25 -s 800x800 -i :0.0+0,0 -vcodec huffyuv -pix_fmt yuv422p lala.avi
ffmpeg -y -f x11grab -r 25 -s 800x800 -i :0.0+0,0 -vcodec huffyuv -pix_fmt rgb24 lala.avi
ffmpeg -y -f x11grab -r 25 -s 800x800 -i :0.0+0,0 -vcodec huffyuv -pix_fmt yuv444p lala.avi
ffmpeg -y -f x11grab -r 25 -s 800x700 -i :0.0+0,0 -vcodec mjpeg -sameq lala.avi

# More complicated (desperate) tries with x264

ffmpeg -y -f x11grab -r 30 -s 1600x1200 -i :0.0+1680,0 -vcodec libx264 -coder 0 -flags +loop -cmp +chroma -partitions -parti8x8-parti4x4-partp8x8-partp4x4-partb8x8 -me_method dia -subq 0 -me_range 16 -g 250 -keyint_min 25 -sc_threshold 40 -threads 0 lala.mkv

ffmpeg -y -f x11grab -r 30 -s 1600x1200 -i :0.0+1680,0 -vcodec libx264 -coder 0 -flags +loop -cmp +chroma -partitions -parti8x8-parti4x4-partp8x8-partp4x4-partb8x8 -me_method dia -subq 0 -me_range 16 -g 250 -keyint_min 25 -sc_threshold 40 i_qfactor 0.71 -b_strategy 1 -qcomp 0.6 -threads 0 lala.mkv

ffmpeg -y -f x11grab -r 30 -s 1600x1200 -i :0.0+1680,0 -vcodec libx264 -coder 0 -flags +loop -cmp +chroma -partitions -parti8x8-parti4x4-partp8x8-partp4x4-partb8x8 -me_method dia -subq 0 -me_range 16 -g 250 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -b_strategy 1 -qcomp 0.6 -threads 0 lala.mkv

ffmpeg -y -f x11grab -r 30 -s 1600x1200 -i :0.0+1680,0 -vcodec libx264 -coder 0 -flags +loop -cmp +chroma -partitions -parti8x8-parti4x4-partp8x8-partp4x4-partb8x8 -me_method dia -subq 0 -me_range 16 -g 250 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -b_strategy 1 -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -directpred 1 -flags2 +fastpskip -cqp 0 -threads 0 lala.mkv

ffmpeg -y -f x11grab -r 25 -s 800x800 -i :0.0+0,0 -vcodec libx264 -profile high444 -preset fast -tune stillimage lala.mkv

# And many, many more ...