Quality settings for the PVR 250/350 can be added by modifying the properties file.

You don't need to specify all of the parameters for the quality setting; below is the list of the available parameters, their possible values, and their defaults. These are not case sensitive.

QualityName - is the name that will show up in SageRecorder for the Record quality option. Don't use any spaces or non-alphanumeric characters for the name unless you understand using backslash to do escape sequences.
audiooutputmode - 0 for stereo, 1 for joint, 2 for dual, and 3 for mono. stereo is the default
audiocrc - 0 for off, 1 for on. off is the default
gopsize - 15 and 6 are valid. 15 is the default
videobitrate - in bits/second. 4000000 is the default (4 Mbps)
inversetelecine - 0 is off, 1 is on. default is off
closedgop - 0 is off, 1 is on. default is off
vbr - 0 is off, 1 is on. default is off
outputstreamtype - 0 for Program Stream, 2 for MPEG1 stream, 10 for DVD compliant stream, 11 for VCD compliant stream. Program Stream is the default
width - 720, 480 or 352. 720 is the default (NOTE valid widthxheight combos are 720x480, 480x480, 352x480 and 35x240)
height - 240 or 480. 480 is the default
audiobitrate - in kilobits/second 192, 224, 256, 320, 384. default is 384
audiosampling - 32000, 44100, 48000. default is 48000
peakvideobitrate - in bits/second. This max bitrate when using VBR mode make the videobitrate 1.5x lower see the examples.

For SageRecorder; you only need to add one property per quality setting.
SageRecorder.properties file: Examples SageRecorder property setting.
mmc/python2_encoding/QualityName=videobitrate=2800000|width=480|height=480|audiobitrate=256

My Example for HQ DVD.
mmc/python2_encoding/MyDVD=videobitrate=4500000|width=720|height=480|audiobitrate=224|vbr=1|peakvideobitrate=6000000

My Example for VCD.
mmc/python2_encoding/VCD=videobitrate=1520000|width=352|height=240|audiobitrate=224|outputstreamtype=11|audiosampling=44100

My Example for backslash.
seeker/recording_qualities/MyDVD\ -\ 2\ hour=MyDVD,224,48000,6000000

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For SageTV; you need to add the same property you did with SageRecorder; but you also need to add another property that includes additional bitrate information. It's format is as follows:

SageTVQualityName - is the name that will show up in SageTV for the quality option. Don't use any spaces or non-alphanumeric characters for the name unless you understand using backslash to do escape sequences.
QualityName - refers to the property setting you created above
384 - is the audio bitrate in kbps, and is irrelevant (but must be present) because the one above overrides it
48000 is the audio sampling rate, and is also irrelevant (but must be present) because the one above overrides it
4444444 - is the overall bitrate of the entire stream in bits/second

For SageTV; you only need to add one property per quality setting.
Sage.properties file: Examples on the SageTV property setting.
seeker/recording_qualities/SageTVQualityName=QualityName,384,48000,4444444

My Example for HQ DVD.
seeker/recording_qualities/MyDVD=MyDVD,224,48000,6000000
mmc/python2_encoding/MyDVD=videobitrate=4500000|width=720|height=480|audiobitrate=224|vbr=1|peakvideobitrate=6000000

My Example for VCD.
seeker/recording_qualities/VCD=VCD,224,44100,15200000
mmc/python2_encoding/VCD=videobitrate=1520000|width=352|height=240|audiobitrate=224|outputstreamtype=11|audiosampling=44100

My Example for backslash.
seeker/recording_qualities/MyDVD\ -\ 2\ hour=MyDVD\ -\ 2\ hour,224,48000,6000000
mmc/python2_encoding/MyDVD\ -\ 2\ hour=videobitrate=4500000|width=720|height=480|audiobitrate=224|vbr=1|peakvideobitrate=6000000

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Prefiltering settings can be added to the quality settings, here's the names of the variables to use:

disablefilter - 0:Disable, filter settings will be disabled.
medianfilter - 0:Disable, 1:Horizontal, 2:Vertical, 3:Horz&Vert(default), 4:Diagonal
mediancoringlumahi - 0 to 255 (default 0)
mediancoringlumalo - 0 to 255 (default 255)
mediancoringchromahi - 0 to 255 (default 0)
mediancoringchromalo - 0 to 255 (default 255)
lumaspatialflt - 0:Disable, 1:1D Horiz, 2:1D Vert, 3:2D Horz & Vert Seperatable(default), 4:2D Non Seperable
chromaspatialflt - 0:Disable, 1:1D Horz(default)
dnrmode - 0:StaticBoth, 1:StaticTime/DynamicSpace, 2:DynamicTime/StaticSpace, 3:DynamicBoth(default)
dnrspatialfltlevel - 0 to 15 (default 0) - used in static mode only
dnrtemporalfltlevel - 0 to 15 (default 0) - used in static mode only
dnrsmoothfactor - 0 to 255 (default 200)
dnr_ntlf_max_y - 0 to 15 (default 15) - max NTLF Luma
dnr_ntlf_max_uv - 0 to 15 (default 15) - max NTLF Chroma
dnrtemporalmultfactor - 0 to 255 (default 48) - temporal filter multplier factor
dnrtemporaladdfactor - 0 to 15 (default 4) - temporal filter add factor
dnrspatialmultfactor - 0 to 255 (default 21) - spatial filter multiplier factor
dnrspatialsubfactor - 0 to 15 (default 2) - spatial filter sub factor
lumanltflevel - 0 to 15
lumanltfcoeffindex - 0 to 63
lumanltfcoeffvalue - 0 to 255
vimzoneheight - 0 to 15 (default 2)

Example for Prefiltering settings
mmc/python2_encoding/MyDVD\ -\ 2\ hour=videobitrate=4500000|width=720|height=480|audiobitrate=224|vbr=1|peakvideobitrate=6000000|disablefilter=0|dnrsmoothfactor=180