@item -r fps
Set frame rate (Hz value, fraction or abbreviation), (default = 25).
@item -s size
-Set frame size. The format is @samp{wxh} (default = 160x128).
+Set frame size. The format is @samp{wxh} (ffserver default = 160x128, ffmpeg default = same as source).
The following abbreviations are recognized:
@table @samp
@item sqcif
@item AC3 @tab IX @tab IX
@tab liba52 is used internally for decoding.
@item Vorbis @tab X @tab X
-@item WMA V1/V2 @tab @tab X
+@item WMA V1/V2 @tab X @tab X
@item AAC @tab X @tab X
@tab Supported through the external library libfaac/libfaad.
@item Microsoft ADPCM @tab X @tab X