[Bug 689278] New: [videoscale] Letter boxing bug

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=689278
  GStreamer | gst-plugins-base | 1.x

           Summary: [videoscale] Letter boxing bug
    Classification: Platform
           Product: GStreamer
           Version: 1.x
        OS/Version: Windows
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: jagadishkamathk at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Border gets added with proper aspect ratio only when pixel-aspect-ratio is set
to 1 in filter caps. 

I would want to scale an image with letter box for maintaining display aspect
ratio. I tried to upscale a 352x288 image to 640x360 by running the below
mentioned command. I'm not satisfied with the result. Input is
http://i49.tinypic.com/os51r6.png but the result is
http://i47.tinypic.com/25ksm6s.png  

gst-launch-1.0 -v filesrc location=/mnt/temp/cif_test.yuv ! videoparse
width=352 height=288 ! videoscale add-borders=1  !
video/x-raw,width=640,height=360  !  filesink location=/mnt/temp/out.yuv 

My log looked like 

Setting pipeline to PAUSED ... 
Pipeline is PREROLLING ... 
/GstPipeline:pipeline0/GstVideoParse:videoparse0.GstPad:src: caps =
video/x-raw, format=(string)I420, width=(int)352, height=(int)288,
pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive,
colorimetry=(string)bt601, framerate=(fraction)25/1 
/GstPipeline:pipeline0/GstVideoScale:videoscale0.GstPad:src: caps =
video/x-raw, format=(string)I420, width=(int)640, height=(int)360,
pixel-aspect-ratio=(fraction)11/16, interlace-mode=(string)progressive,
colorimetry=(string)bt601, framerate=(fraction)25/1 
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:src: caps =
video/x-raw, format=(string)I420, width=(int)640, height=(int)360,
pixel-aspect-ratio=(fraction)11/16, interlace-mode=(string)progressive,
colorimetry=(string)bt601, framerate=(fraction)25/1 
/GstPipeline:pipeline0/GstFileSink:filesink0.GstPad:sink: caps = video/x-raw,
format=(string)I420, width=(int)640, height=(int)360,
pixel-aspect-ratio=(fraction)11/16, interlace-mode=(string)progressive,
colorimetry=(string)bt601, framerate=(fraction)25/1 
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:sink: caps =
video/x-raw, format=(string)I420, width=(int)640, height=(int)360,
pixel-aspect-ratio=(fraction)11/16, interlace-mode=(string)progressive,
colorimetry=(string)bt601, framerate=(fraction)25/1 
/GstPipeline:pipeline0/GstVideoScale:videoscale0.GstPad:sink: caps =
video/x-raw, format=(string)I420, width=(int)352, height=(int)288,
pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive,
colorimetry=(string)bt601, framerate=(fraction)25/1 
Pipeline is PREROLLED ... 
Setting pipeline to PLAYING ... 
New clock: GstSystemClock 
Got EOS from element "pipeline0". 
Execution ended after 3051953093 ns. 
Setting pipeline to PAUSED ... 
Setting pipeline to READY ... 
Setting pipeline to NULL ... 
Freeing pipeline ... 

This doesn't work:
gst-launch-1.0 videotestsrc ! video/x-raw,width=352,height=288 ! videoscale
add-borders=1 ! video/x-raw,width=640,height=360 ! xvimagesink 

This works: 
gst-launch-1.0 videotestsrc ! video/x-raw,width=352,height=288 ! videoscale
add-borders=1 ! video/x-raw,width=640,height=360,pixel-aspect-ratio=1/1 !
xvimagesink

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