@chapter Protocols
@c man begin PROTOCOLS
-Protocols are configured elements in Libav which allow to access
+Protocols are configured elements in FFmpeg which allow to access
resources which require the use of a particular protocol.
-When you configure your Libav build, all the supported protocols are
+When you configure your FFmpeg build, all the supported protocols are
enabled by default. You can list all available ones using the
configure option "--list-protocols".
protocol.
For example to read a sequence of files @file{split1.mpeg},
-@file{split2.mpeg}, @file{split3.mpeg} with @file{avplay} use the
+@file{split2.mpeg}, @file{split3.mpeg} with @file{ffplay} use the
command:
@example
-avplay concat:split1.mpeg\|split2.mpeg\|split3.mpeg
+ffplay concat:split1.mpeg\|split2.mpeg\|split3.mpeg
@end example
Note that you may need to escape the character "|" which is special for
@end table
-For example to read with @file{avplay} a multimedia resource named
+For example to read with @file{ffplay} a multimedia resource named
"sample" from the application "vod" from an RTMP server "myserver":
@example
-avplay rtmp://myserver/vod/sample
+ffplay rtmp://myserver/vod/sample
@end example
@section rtmp, rtmpe, rtmps, rtmpt, rtmpte
ffmpeg -re -i myfile -f flv rtmp://myserver/live/mystream
@end example
-To play the same stream using @file{avplay}:
+To play the same stream using @file{ffplay}:
@example
-avplay "rtmp://myserver/live/mystream live=1"
+ffplay "rtmp://myserver/live/mystream live=1"
@end example
@section rtp
The required syntax for a RTSP url is:
@example
-rtsp://@var{hostname}[:@var{port}]/@var{path}[?@var{options}]
+rtsp://@var{hostname}[:@var{port}]/@var{path}
@end example
-@var{options} is a @code{&}-separated list. The following options
+The following options (set on the @file{ffmpeg}/@file{ffplay} command
+line, or set in code via @code{AVOption}s or in @code{avformat_open_input}),
are supported:
+Flags for @code{rtsp_transport}:
+
@table @option
@item udp
Use TCP (interleaving within the RTSP control channel) as lower
transport protocol.
-@item multicast
+@item udp_multicast
Use UDP multicast as lower transport protocol.
@item http
Use HTTP tunneling as lower transport protocol, which is useful for
passing proxies.
-
-@item filter_src
-Accept packets only from negotiated peer address and port.
@end table
Multiple lower transport protocols may be specified, in that case they are
tried one at a time (if the setup of one fails, the next one is tried).
For the muxer, only the @code{tcp} and @code{udp} options are supported.
+Flags for @code{rtsp_flags}:
+
+@table @option
+@item filter_src
+Accept packets only from negotiated peer address and port.
+@end table
+
When receiving data over UDP, the demuxer tries to reorder received packets
(since they may arrive out of order, or packets may get lost totally). In
order for this to be enabled, a maximum delay must be specified in the
@code{max_delay} field of AVFormatContext.
-When watching multi-bitrate Real-RTSP streams with @file{avplay}, the
+When watching multi-bitrate Real-RTSP streams with @file{ffplay}, the
streams to display can be chosen with @code{-vst} @var{n} and
@code{-ast} @var{n} for video and audio respectively, and can be switched
on the fly by pressing @code{v} and @code{a}.
To watch a stream over UDP, with a max reordering delay of 0.5 seconds:
@example
-avplay -max_delay 500000 rtsp://server/video.mp4?udp
+ffplay -max_delay 500000 -rtsp_transport udp rtsp://server/video.mp4
@end example
To watch a stream tunneled over HTTP:
@example
-avplay rtsp://server/video.mp4?http
+ffplay -rtsp_transport http rtsp://server/video.mp4
@end example
To send a stream in realtime to a RTSP server, for others to watch:
ffmpeg -re -i @var{input} -f sap sap://224.0.0.255?same_port=1
@end example
-Similarly, for watching in avplay:
+Similarly, for watching in ffplay:
@example
ffmpeg -re -i @var{input} -f sap sap://224.0.0.255
@end example
-And for watching in avplay, over IPv6:
+And for watching in ffplay, over IPv6:
@example
ffmpeg -re -i @var{input} -f sap sap://[ff0e::1:2:3:4]
To play back the first stream announced on the normal SAP multicast address:
@example
-avplay sap://
+ffplay sap://
@end example
To play back the first stream announced on one the default IPv6 SAP multicast address:
@example
-avplay sap://[ff0e::2:7ffe]
+ffplay sap://[ff0e::2:7ffe]
@end example
@section tcp
@example
ffmpeg -i @var{input} -f @var{format} tcp://@var{hostname}:@var{port}?listen
-avplay tcp://@var{hostname}:@var{port}
+ffplay tcp://@var{hostname}:@var{port}
@end example
@end table