[vlc-devel] VLC RTSP client support for Transport Stream 'trick play' operations
finlayson at live555.com
Fri Jan 12 21:14:55 CET 2007
FYI, the LIVE555 RTSP server implementation now supports trick play
operations (seeking, fast forward, reverse play) on MPEG Transport
Stream files. Note, for example, our new 'media server' application:
However, VLC - when playing these streams as a RTSP client -
currently does not perform these trick play operations correctly from
its GUI. Note that the LIVE555 RTSP client library fully supports
trick play operations (note the optional "start", "end" and "scale"
parameters to "RTSPClient::playMediaSession()"); it's just that VLC
does not pass these parameters (in particular, "scale") when calling
Could someone please take a look at this? I suspect that a fix will
be quite straightforward, and will give VLC important new
functionality - basically, client support for VOD with trick play.
It's important to note that - apart from the GUI, and the parameters
passed to "RTSPClient::playMediaSession()" in the LIVE555 library -
the fact that the server is performing a 'trick play' operation is
completely transparent to the VLC client. I.e., VLC's rendering code
will continue to see what it thinks is a regular Transport Stream -
with no discontinuity in PCR timestamps - so you won't need to make
any changes there.
Live Networks, Inc.
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