FWIW, here's a quick comparison, bob vs temporal deinterlacing:

http://imgur.com/4WVj8ii,AEAucba

Notice the increased sharpness in the second image.

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https://bugs.launchpad.net/bugs/1287326

Title:
  [FFe] Include Temporal Deinterlacer into libvdpau1-drivers-mesa

Status in “mesa” package in Ubuntu:
  Triaged

Bug description:
  Beginning with Ubuntu 14.04 mesa will be shipping with vdpau drivers
  that can be used by e.g. radeon / radeonsi OSS drivers. This allows
  low power systems, like AMD E350, Kabini and so on to playback Full HD
  h264, vc1, mpeg4 and mpeg2 videos.

  Sadly the world is not only progressive. LiveTV is most of the time
  broadcasted as 1080i h264 or 576i mpeg2, which means, that it has to
  be deinterlaced after decoding. In current mesa vdpau (as is in 10.1)
  code only simple Bobbing [a] is implemented. This low quality method
  produces one full frame out of every field. This introduces flickering
  first and last line, when not taking care to cut those correctly.

  Grigori Goronzy (zgreg) has developed a high quality / state of the
  art Temporal deinterlacer [1][a] for mesa, which introduces far better
  quality than simple bobbing would do.

  This deinterlacer was already included into mesa master and was
  furthermore tested since more than 4 months via a special ppa in
  combination with xbmc [2]. This ppa was used by some thousand unique
  people.

  We would really like to see this deinterlacer in Ubuntu 14.04. This
  would make the new version a great basis for every htpc out there.

  I will attach the current patches, fetched via git format-patch out of
  mesa git tree.

  [a] http://en.wikipedia.org/wiki/Deinterlacing (Motion Adaptive vs. Bobbing)
  [1] Original Patch: 
http://anzwix.com/a/Mesa/StvdpauAddSupportForDEINTERLACETEMPORAL
  [2] http://forum.xbmc.org/showthread.php?tid=174854

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