[mythtv-commits] Ticket #8937: 1080i previews include pixels that are not meant to be active

MythTV mythtv at cvs.mythtv.org
Wed Sep 15 04:53:27 UTC 2010


#8937: 1080i previews include pixels that are not meant to be active
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     Reporter:  beirdo            |       Owner:  danielk   
         Type:  defect            |      Status:  new       
     Priority:  minor             |   Milestone:  unknown   
    Component:  MythTV - General  |     Version:  Trunk Head
     Severity:  low               |    Keywords:            
Ticket locked:  0                 |  
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 1080i is 1920x1080 by definition, but due to H.264 and MPEG-2 macroblock
 size, etc, it is decoded as 1920x1088.  The bottom 8 pixels in the frame
 are not meant to be active, and should be removed.  For playback (and I
 believe commercial detection), we have dealt with this already, but in
 generating the previews, we have not.

 I have attached a fairly simple patch that will take 1920x1088 frames in
 the preview generation, and crop off the bottom 8 pixels to recreate
 1920x1080 before resizing to the preview size.

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Ticket URL: <http://svn.mythtv.org/trac/ticket/8937>
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