ffplay: update documentation

Reviewed-by: Lou Logan <lou@lrcd.com>
Signed-off-by: Marton Balint <cus@passwd.hu>

doc/ffplay.texi

@@ -37,10 +37,14 @@ Force displayed height.
 Set frame size (WxH or abbreviation), needed for videos which do
 not contain a header with the frame size like raw YUV.  This option
 has been deprecated in favor of private options, try -video_size.
+@item -fs
+Start in fullscreen mode.
 @item -an
 Disable audio.
 @item -vn
 Disable video.
+@item -sn
+Disable subtitles.
 @item -ss @var{pos}
 Seek to a given position in seconds.
 @item -t @var{duration}
@@ -113,9 +117,6 @@ explicitly disable it you need to specify @code{-nostats}.
 Non-spec-compliant optimizations.
 @item -genpts
 Generate pts.
-@item -rtp_tcp
-Force RTP/TCP protocol usage instead of RTP/UDP. It is only meaningful
-if you are streaming with the RTSP protocol.
 @item -sync @var{type}
 Set the master clock to audio (@code{type=audio}), video
 (@code{type=video}) or external (@code{type=ext}). Default is audio. The
@@ -124,7 +125,8 @@ players use audio as master clock, but in some cases (streaming or high
 quality broadcast) it is necessary to change that. This option is mainly
 used for debugging purposes.
 @item -threads @var{count}
-Set the thread count.
+Set the thread count. By default, @command{ffplay} automatically detects a
+suitable number of threads to use.
 @item -ast @var{audio_stream_number}
 Select the desired audio stream number, counting from 0. The number
 refers to the list of all the input audio streams. If it is greater
@@ -162,8 +164,20 @@ Force a specific video decoder.
 Force a specific subtitle decoder.
 
 @item -autorotate
-Automatically rotate the video according to presentation metadata. Set by
+Automatically rotate the video according to presentation metadata. Enabled by
-default, use -noautorotate to disable.
+default, use @option{-noautorotate} to disable it.
+
+@item -framedrop
+Drop video frames if video is out of sync. Enabled by default if the master
+clock is not set to video. Use this option to enable frame dropping for all
+master clock sources, use @option{-noframedrop} to disable it.
+
+@item -infbuf
+Do not limit the input buffer size, read as much data as possible from the
+input as soon as possible. Enabled by default for realtime streams, where data
+may be dropped if not read in time. Use this option to enable infinite buffers
+for all inputs, use @option{-noinfbuf} to disable it.
+
 @end table
 
 @section While playing