diff --git a/etc/encoding-example-profiles.conf b/etc/encoding-example-profiles.conf
index c232bb8f25..3ab38e2d12 100644
--- a/etc/encoding-example-profiles.conf
+++ b/etc/encoding-example-profiles.conf
@@ -68,6 +68,7 @@ ovcopts = qscale=4
 profile-desc = "H.264 (x264)"
 ovc = libx264
 ovcopts = preset=medium,crf=23,threads=0
+vf-add = noformat=444p,noformat=444p9,noformat=444p10,noformat=422p,noformat=422p9,noformat=422p10
 
 [enc-v-mpeg2]
 profile-desc = "MPEG-2 Video (FFmpeg)"
@@ -152,15 +153,14 @@ profile-desc = "MP4 for Blackberry Bold 9000"
 profile = enc-f-mp4
 vf-add = dsize=480:360:0:2,scale=w=0:h=0,dsize=-1:-1 # native screen res, letterbox
 ovcopts-add = maxrate=1500k,bufsize=1000k,rc_init_occupancy=900k,refs=1,profile=baseline
-vf-add=noformat=444p,noformat=444p9,noformat=444p10,noformat=422p,noformat=422p9,noformat=422p10
 omaxfps = 30
 
 [enc-to-nok-n900]
 profile-desc = "MP4 for Nokia N900"
 profile = enc-f-mp4
-vf-add = dsize=800:480:0:2,scale=w=0:h=0:noup=1 # native screen res, letterbox
+# DW = 800, DH = 480, SAR = 1
+vf-add = lavfi=graph="scale=floor(min(min(800\,dar*480)\,in_w*max(1\,sar))/2+0.5)*2:floor(min(min(800/dar\,480)\,in_h*max(1/sar\,1))/2+0.5)*2,setsar=1"
 ovcopts-add = profile=baseline,level=30,maxrate=10000k,bufsize=10000k,rc_init_occupancy=9000k,refs=5
-vf-add=noformat=444p,noformat=444p9,noformat=444p10,noformat=422p,noformat=422p9,noformat=422p10
 omaxfps = 30
 
 [enc-to-nok-6300]
@@ -180,14 +180,12 @@ vf-add = scale=w=480:h=272,dsize=480:270
 srate = 48000
 channels = 2
 ovcopts-add = b=512k,profile=baseline
-vf-add=noformat=444p,noformat=444p9,noformat=444p10,noformat=422p,noformat=422p9,noformat=422p10
 
 [enc-to-iphone-noscale]
 profile-desc = "MP4 for iPhone (no scaling)"
 profile = enc-f-mp4
 oautofps = yes # iphone supports 30fps max
 ovcopts-add = maxrate=2500k,bufsize=1000k,rc_init_occupancy=900k,level=30,profile=baseline
-vf-add=noformat=444p,noformat=444p9,noformat=444p10,noformat=422p,noformat=422p9,noformat=422p10
 omaxfps = 30
 
 [enc-to-iphone]
@@ -207,3 +205,37 @@ profile-desc = "MP4 for iPhone 5 (1136x640)"
 profile = enc-to-iphone-noscale
 vf-add = dsize=1136:480:1:2,scale=w=0:h=0,dsize=-1:-1 # panscan
 omaxfps = 30
+
+[enc-to-hp-slate-7]
+profile-desc = "MP4 for HP Slate 7 (1024x600, crazy aspect)"
+profile = enc-f-mp4
+omaxfps = 30
+ovcopts-add = profile=high
+# DW = 1024, DH = 600, DAR = 97:54 (=> SAR = 2425:2304)
+vf-add = lavfi=graph="scale=2*floor(0.5+0.5*min(1024*min(1\,dar*54/97)\,in_w*max(1\,sar*2304/2425))):2*floor(0.5+0.5*min(600*min(97/54/dar\,1)\,in_h*max(2425/2304/sar\,1))),setsar=1"
+
+# Advanced scaling for specific output devices - how it works:
+# DW = display width (px) (1024)
+# DH = display height (px) (600)
+# SAR = display sample aspect ratio, i.e. DAR * DH / DW (2425:2304)
+# DAR = display aspect ratio, i.e. SAR * DW / DH (97:54)
+# Variant: zoomed out
+# vf-add = lavfi=graph="scale=floor(min(DW*min(1\,dar/DAR)\,in_w*max(1\,sar/SAR))/2+0.5)*2:floor(min(DH*min(DAR/dar\,1)\,in_h*max(SAR/sar\,1))/2+0.5)*2,setsar=1"
+# Variant: zoomed in
+# vf-add = lavfi=graph="scale=floor(min(DW*max(1\,dar/DAR)\,in_w*max(1\,sar/SAR))/2+0.5)*2:floor(min(DH*max(DAR/dar\,1)\,in_h*max(SAR/sar\,1))/2+0.5)*2,setsar=1"
+# How it works:
+# 1a: DW, DH*dar/DAR - fit to display width
+# 1b: DH*DAR/dar, DH - fit to display height
+# 1: the min of 1a and 1b these (i.e. fit inside both width and height); for zoomed in view, use the max
+# 2a: in_w, in_h*SAR/sar - fit to original width
+# 2b: in_w*sar/SAR, in_h - fit to original height
+# 2: the max of 2a and 2b (i.e. avoid enlarging both dimensions - let HW scaling handle this)
+# output: the min of 1 and 2 (i.e. fulfill both constraints)
+# setsar=1 to prevent scaling on the device (skip this if the device actually wants the proper sar to be specified for not performing needless scaling)
+#
+# Simplified special case for SAR == 1, DAR == DW/DH:
+# Variant: zoomed out
+# vf-add = lavfi=graph="scale=floor(min(min(DW\,dar*DH)\,in_w*max(1\,sar))/2+0.5)*2:floor(min(min(DW/dar\,DH)\,in_h*max(1/sar\,1))/2+0.5)*2,setsar=1"
+# Variant: zoomed in
+# vf-add = lavfi=graph="scale=floor(min(max(DW\,dar*DH)\,in_w*max(1\,sar))/2+0.5)*2:floor(min(max(DW/dar\,DH)\,in_h*max(1/sar\,1))/2+0.5)*2,setsar=1"
+# setsar=1 to prevent nasty almost-1 sar to be passed to the codec due to the rounding which can fail