manual NVTV encoder settings (change encoder bit rate)

[mvdlande]

The NVTV driver wouldn't let me change the MPEG encoder settings, furthermore the recorded file size was to big and therefore I modified the NVTV driver inf file (DVxplore.inf)

With a standard installation the encoder settings are set to a nominal rate of 9.0Mbps with a peak rate of 9.5Mbps with a screen resolution of 720x480. I changed this to a nominal rate of 4.5Mbps with a peak rate of 6.0Mbps with a screen resolution of 720x576. Which I think is a good quality.

These settings can also be modified in the windows registry, just search for the string "ReferencePictDistance". Then look a few lines up and change the "bitrate" and "PeakBitRate" settings. (select decimal!)

Then reboot (to be sure)

Or install the new driver

Then reboot(again to be sure)

This is a link to the modified driver

ftp://denbosch.vandelande.com/NVTV/

To change a value convert the decimal number to HEX (use calc)
example 4500000 decimal = 0044AA20 HEX --> modify key to 20,AA,44,00

These are the modified values I used

;modified values
; c0,c6,2d,00 ;t = 3.00Mbps
HKR,Encode,"BitRate",0x10001, 20,AA,44,00 ; = 4.50Mbps
HKR,Encode,"PeakBitRate",0x10001, 80,8D,5B,00 ; = 6.00Mbps
HKR,Encode,"HorizontalSize",0x10001, d0,02,00,00 ;720
HKR,Encode,"VerticalSize",0x10001, 40,02,00,00 ;576
HKR,Encode,"IntraPictDistance",0x10001, 0f,00,00,00
HKR,Encode,"ReferencePictDistance",0x10001, 03,00,00,00

HKR,AUDIO,"SamplingFrequency",0x10001, 44,AC,00,00 ;44100

; some other values
;HKR,Encode,"BitRate",0x10001, c0,c6,2d,00 ;Default = 3.00Mbps
;HKR,Encode,"PeakBitRate",0x10001, 20,AA,44,00 ;Default = 4.50Mbps

; Defaul values
HKR,Encode,"BitRate",0x10001, 40,54,89,00 ;Default = 9.0Mbps
HKR,Encode,"PeakBitRate",0x10001, 60, F5, 90, 00 ;Default = 9.5Mbps
HKR,Encode,"HorizontalSize",0x10001, d0,02,00,00
HKR,Encode,"VerticalSize",0x10001, e0,01,00,00
HKR,Encode,"IntraPictDistance",0x10001, 0f,00,00,00
HKR,Encode,"ReferencePictDistance",0x10001, 03,00,00,00

HKR,AUDIO,"SamplingFrequency",0x10001, 44,AC,00,00

[Nostacyber]

Isn't there with card properties a possibility to change the encoder settings? Or other drivers (different brand) to use with a nvtv card?

sincerely NostaCyber

btw there are 3 drivers on your location with out a readme... Is it driver 1 or 2 or 3???

[mvdlande]

I have not found a driver with the ability to change the encoder settings. I'm using the registry editor now. The driver I used = "NVTV single tuner PAL mediaportal working.rar" The other driver is newer but has the "gray screen" problem (dvxplore.sys). There is a topic covering that subject. If somebody has found a better driver, please let me know.