[gstreamer-bugs] [Bug 531166] [textoverlay] subtitles shown with delay after keyframe seek

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-plugins-base | Ver: 0.10.19

Tim-Philipp Müller changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |t.i.m at zen.co.uk
         AssignedTo|gstreamer-                  |t.i.m at zen.co.uk
                   |bugs at lists.sourceforge.net  |
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|0                           |1
            Summary|MDVD Seek issue + patch     |[textoverlay] subtitles
                   |                            |shown with delay after
                   |                            |keyframe seek




------- Comment #5 from Tim-Philipp Müller  2008-05-05 09:43 UTC -------
The problem has to do with keyunit seeking. What happens is basically that
avidemux will adjust the requested seek position to the position of the next
key frame in the index. This will usually be before the requested seek
position.

The textoverlay element, however, will not know about this adjustment being
made and won't know about the actual new start position of the stream, it will
send data from the requested position (which is a few seconds after the actual
start). That's where the initial gap/delay of the subtitle display comes from.


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