complete --command youtube-dl --long-option prefer-avconv --description 'Prefer avconv over ffmpeg for running the postprocessors'
complete --command youtube-dl --long-option prefer-ffmpeg --description 'Prefer ffmpeg over avconv for running the postprocessors (default)'
complete --command youtube-dl --long-option ffmpeg-location --description 'Location of the ffmpeg/avconv binary; either the path to the binary or its containing directory.'
complete --command youtube-dl --long-option prefer-avconv --description 'Prefer avconv over ffmpeg for running the postprocessors'
complete --command youtube-dl --long-option prefer-ffmpeg --description 'Prefer ffmpeg over avconv for running the postprocessors (default)'
complete --command youtube-dl --long-option ffmpeg-location --description 'Location of the ffmpeg/avconv binary; either the path to the binary or its containing directory.'