Clarify with an example what the user should use instead of the
deprecated (and no longer working) -s/-pix_fmt options.
Signed-off-by: Anton Khirnov <anton@khirnov.net>
Force displayed height.
@item -s @var{size}
This option has been removed. Use private format options for specifying the
-input video size.
+input video size. For example with the rawvideo demuxer you need to specify the
+option @var{video_size}.
@item -an
Disable audio.
@item -vn
@table @option
@item -pix_fmt @var{format}
This option has been removed. Use private options for specifying the
-input pixel format.
+input pixel format. For example with the rawvideo demuxer you need to specify
+the option @var{pixel_format}.
@item -stats
Show the stream duration, the codec parameters, the current position in
the stream and the audio/video synchronisation drift.