[Bug 740671] New: aspectratiocrop: continuos playback, when changing the video size, crop needs reset

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=740671
  GStreamer | gst-plugins-good | git

           Summary: aspectratiocrop: continuos playback, when changing the
                    video size, crop needs reset
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: sarakusha at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Created an attachment (id=291434)
 View: https://bugzilla.gnome.org/attachment.cgi?id=291434
 Review: https://bugzilla.gnome.org/review?bug=740671&attachment=291434

fix

with continuous playback of multiple files, the transition to a file with a
smaller video size can causes the negotiation problem.

example (for aspect-ratio 3:2)
first video: 1280x720, crop: l=160,r=160,b=0,t=0
second video: 320x320, crop: l=0,r=0,b=40,t=40

Caps negotiations take place before setting the crop, and for the second video
crop will still l=160,r=160,b=0,t=0
 320x320 => (crop l=160,r=160,b=0,t=0) => 0x320 => negotiation error

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