command.outputOption('-b_strategy 1')
command.outputOption('-bf 16')
command.outputOption('-preset superfast')
command.outputOption('-level 3.1')
command.outputOption('-map_metadata -1')
command.outputOption('-pix_fmt yuv420p')
command.outputOption('-b_strategy 1')
command.outputOption('-bf 16')
command.outputOption('-preset superfast')
command.outputOption('-level 3.1')
command.outputOption('-map_metadata -1')
command.outputOption('-pix_fmt yuv420p')