On Tue, Jul 25, 2017 at 10:59 AM, Mettavihari D <tv.lists at gmail.com> wrote: > Reading option '-b:a 128k' ... matched as option 'b' (video bitrate > (please use -b:v)) with argument '-vcodec'. > Reading option 'libx264' ... matched as output url. > Remove the quotes surrounding the whole of -b:a 128k and quote them separately.