[vlc-devel] Status of GUI support for RTSP seeking/fast-forward/reverse-play?

[Glen Gray]

On 11 Nov 2008, at 11:36, Jean-Baptiste Kempf wrote:
>> The trickplay patches tell the RTSP server to "play" at a particular
>> Scale factor, where 1.0 == normal play, 2.0 == double speed aka
>> FastForward and -2.0 == Rewind at double speed.  (2.0 is just an
>> example)
>
> Then, should this really be in the UI or in the core when you change  
> the
> rate ?

Well, the patchset basically got the Rate code in src/input/input.c  
iirc to query the demuxer to see if it supported scaled trickplay

+            int i_rate, i_ret;
+            vlc_bool_t b_scale_trickplay = VLC_FALSE;
+
+            /* Check to see if the Demux allows us to use Scale  
trickplay */
+            i_ret = demux2_Control( p_input->input.p_demux,
+                                    DEMUX_HAS_SCALE_TRICKPLAY,
+                                    &b_scale_trickplay );
+            if( i_ret == VLC_SUCCESS && b_scale_trickplay == VLC_TRUE )
+            {
+                double scale = val.f_float;
+
+                msg_Dbg( p_input, "Setting RTSP Scale to %0.2f",  
scale);
+                demux2_Control( p_input->input.p_demux,  
DEMUX_SET_SCALE,
+                                scale );
+                msg_Dbg( p_input, "Checking Scale....");
+                /* Now, readback the value actually used by the  
server */
+                demux2_Control( p_input->input.p_demux,  
DEMUX_GET_SCALE,
+                                &scale);
+                msg_Dbg( p_input, "Scale set to %0.2f", scale);
              }

That's from my original patch, I know fenrir made some adjustments to  
the patches based on conversations that where held on IRC at the time,  
I can't recall exactly what.

The patches and a source rpm I used for FC5 are still available at http://slaine.org/files/vlc/0.8.6c/

Kind Regards,
--
Glen Gray
slaine at slaine.org