1. 11 Jun, 2015 7 commits
  2. 10 Jun, 2015 8 commits
  3. 09 Jun, 2015 5 commits
    • Marco's avatar
    • Marco's avatar
      Adjust some parameters for cyclic refresh for low bitrates. · 997ac14c
      Marco authored
      Reduce motion threshold and boost factor for second segment,
      for low bitrates, at low resolutions for now.
      This is to reduce the rate fluctuation/frame dropping that occurs
      at these low bitrates.
      
      Change-Id: Ia66c3be41831882fca8c1e4fe104f5ea8fbe7142
      997ac14c
    • Debargha Mukherjee's avatar
    • Paul Wilkins's avatar
      Changes to active maxq calculation in two pass. · faf8c63b
      Paul Wilkins authored
      Some initial experiments into discounting dead zone
      formating bars and intra skip blocks (common in some
      types of animation and graphics) in the calculation of
      the active max Q for each ARF/GF group.
      
      TODO: check for vertical formating bars and validate the
      horizontal bar at the bottom edge of the image.
      
      As expected, this change as it stands, does not make much
      difference for the natural videos in the std-hd and derf sets.
      However, for the yt and yt hd set there is a significant rise
      in the average PSNR with overall PSNR and SSIM remaining
      neutral.
      
      The mean rise for the YT-HD test set was > 6%. This is mainly
      because the change allows Q to drop further on titles and
      other graphics sections where spending a small number of
      extra bits gives a sharp rise in PSNR.
      
      Change-Id: I3f878ae91fc1854312d7ecf9fa792c17bc1aa6b7
      faf8c63b
    • Paul Wilkins's avatar
      Enable more split modes for animated content. · 4a28da58
      Paul Wilkins authored
      For content that is identified as likely to contain some
      animation or graphics content, increase the availability
      of split modes for good quality speeds 1-3.
      
      On a problem test animation clip this improves metrics
      results by about 0.25 db and makes a noticeable difference
      visually. It also causes a small drop in file size (~0.5%) but
      a rise in encode time of about 5-6% at speed  2.
      
      For more normal content it should have no effect.
      
      Change-Id: Ic4cd9a8de065af9f9402f4477a17442aebf0e439
      4a28da58
  4. 08 Jun, 2015 2 commits
  5. 06 Jun, 2015 6 commits
  6. 05 Jun, 2015 12 commits