[gstreamer-bugs] [Bug 630406] New: [videocrop] cropping an image with one property

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=630406
  GStreamer | gst-plugins-good | git

           Summary: [videocrop] cropping an image with one property
    Classification: Desktop
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: ikt011 at gmail.com
         QAContact: gstreamer-bugs at lists.sourceforge.net
      GNOME target: ---
     GNOME version: ---


Hi,

I'm writing an app that implement some digit ptz function. I'm using the
videocrop element for doing that, but i have some issue with that. If I get a
live view from v4l2src in 25 fps, and applying the a top/right/bottom/left
property in sequence sometimes the picture goes to "jumping". I guess the
problem is the fps rate, the videocrop element crops the top and right side of
the picture, but the next frame is arrived and the bottom and left side will be
cropped from that, and the previous frame will show up incorrectly (in my
view). 

I tried padblock berfore the videocrop, applying the properties, then unblock,
but it will be unusable at low framerate. 

Is there any way to set the 4 property in one? 

Regards,
Tibor

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