[fritsch]

Hmm, interesting. Taking a screenshot of a 1920x800 file being played, it's actually occupying 1920x808? Thus why the doubled lines every 100 pixels in Nearest Neighbor? Properties in debug log show:

07:37:26 T:140159228024576 INFO: ffmpeg[7F795CFF9700]: Stream #0:0(eng): Video: h264 (High), yuv420p, 1920x800, SAR 1:1 DAR 12:5, 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)

07:37:32 T:140158590506752 NOTICE: fps: 23.976024, pwidth: 1920, pheight: 800, dwidth: 1920, dheight: 800
07:37:32 T:140158590506752 DEBUG: OutputPicture - change configuration. 1920x800. framerate: 23.98. format: VAAPI_NV12
07:37:32 T:140158590506752 NOTICE: Display resolution ADJUST : HDMI1: 1920x1080 @ 23.98Hz (22) (weight: 0.000)

And yet a screen capture clearly shows the viewable window as 808 pixels high:

http://i59.tinypic.com/20i6hl5.png

That seems way too much to account for the PAR error.

07:37:10 T:140160032450432 INFO: ID:0x48 Name:1920x1080 Refresh:60.000000 Width:1920 Height:1080
07:37:10 T:140160032450432 INFO: Pixel Ratio: 1.000512

1920 / 1.000512 = 1919,017463059

Yeah, teach your TV to behave better. For the 808 that's not an issue. It is centered and the rest of the surface is black, but the 1919 introduces a ratio change, rescaling and so on. You need the patch I posted above.

...And I just figured out what's causing the 808 pixel issue. Disabling the 1% allowable aspect ratio error fixes the vertical scaling. So it's a MANDATORY 1% error - enforced if it can be, no matter what..

So to fix a 1 pixel horizontal scaling issue, I'm expected to accept an 8 pixel vertical scaling issue? If the file's 1050 pixels high, that'll be an 11 pixel error! Gee. I do wish your "rounding error" fix would be made mainstream, because the alternate fix is worse than the problem!

Any way to simply override the screen's PAR without a complicated EDID replacement?

Hehe :-) Most likely, haha. You could try to experiment with "DisplaySize" in xorg.conf

DisplaySize width height
This optional entry gives the width and height, in millimetres,
of the picture area of the monitor. If given this is used to
calculate the horizontal and vertical pitch (DPI) of the screen.

In OE create /storage/.config/xorg.conf with something like that:

Code:

Section "Device"
  Identifier  "Device0"
  Driver      "intel"
  VendorName  "INTEL Corporation"
  # a user reported, that this could cause high jumping fps in the menus when running on Ubuntu Raring
  # in that case set it to "uxa" instead
  Option "AccelMethod" "sna"
EndSection

Section "Screen"
  Identifier  "Screen0"
  Device      "Device0"
  Monitor     "HDMI1"
  DefaultDepth  24
  SubSection "Display"
    Depth       24
  EndSubSection
EndSection

Section "Monitor"
  Identifier  "HDMI1"
  HorizSync   14.0 - 70.0
  VertRefresh 24.0 - 62.0
  Option      "DPMS" "true"
  DisplaySize 999999 999999 # <- change that accordingly
EndSection

Section "Extensions"
  # fixes tearing
  Option      "Composite"           "Disable"
EndSection

Edit also make sure your output is HDMI1 if not, change it to HDMI0 or HDMI2. xrandr -q will tell.