manual NVTV encoder settings (change encoder bit rate)

Discussion in 'Tips and Tricks' started by mvdlande, June 29, 2006.

?

Do you use a NVTV single tuner device?

  1. yes

    100.0%
  2. no

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  1. mvdlande

    mvdlande New Member

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    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
     
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  3. Nostacyber

    Nostacyber Portal Member

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    card properties

    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???
     
  4. mvdlande

    mvdlande New Member

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    RE: card propereties

    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.
     
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