[vlc-devel] RTSP client 'trick play' support. When will it ever work??

Glen Gray slaine at slaine.org
Wed Jul 8 10:47:16 CEST 2009

I have to agree with Ross here.

I'm pretty disappointed to see this too. After working hard on the  
original patch sets for vlc and live555 with ross, thedj, jpsaman and  
blackjack from 2004 onwards and getting no traction on releases, I was  
really looking forward to this being finally activated and enabled in  
the 1.0 release.

There's absolutely no reason why this can't work, we've tens of  
thousands of vlc installations that are patched for this and are out  
at our customer sites doing rtsp trickplay against live555MediaServer  
and Espial (Kasenna) MediaBase servers.

We'll be porting our platforms to VLC 1.x releases shortly, so  
hopefully I'll be able to get patches out again for fixing the support  
for this.

On 7 Jul 2009, at 23:55, Ross Finlayson wrote:

> After reading on http://www.videolan.org/  that one of the features  
> of VLC v1.0.0 is "RTSP Trickplay support", I excitedly downloaded  
> and installed it, but found - to my dismay - that this still does  
> not work at all.
> (I tested this against a MPEG-2 Transport Stream file streamed by  
> the "LIVE555 Media Server" <http://www.live555.com/mediaServer/>,  
> with the file indexed to support trick play.)
> I found that 'trick play' operations do not work at all.  In  
> particular, the 'faster' and 'slower' controls have no effect (other  
> than displaying "faster" and "slower" in VLC's display).  No new  
> RTSP "PLAY" commands are sent at all.
> Similarly, I could not seek within the stream at all (by trying to  
> drag the playback diamond).
> And pausing works at the GUI, but doesn't actually cause a RTSP  
> "PAUSE" command to be sent, so it's not actually pausing the network  
> stream.
> What's going on here?  Why was "RTSP Trickplay support" promoted as  
> a feature of VLC 1.0.0, when it doesn't work at all?
> (Sorry for the harsh criticism, but it's only because - in most  
> other respects - I love VLC so much :-)
> -- 
> Ross Finlayson
> Live Networks, Inc.
> http://www.live555.com/
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Glen Gray
slaine at slaine.org

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