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  1. 28th Apr 2004 03:12 #1
    godslave
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    I was wondering how to identify between 0-255 and 16-235. Is there a program that can tell you.


    Thanks
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  2. 28th Apr 2004 06:09 #2
    HillJack
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    Huh?!
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  3. 28th Apr 2004 06:12 #3
    jtoolman2000
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    I agree,,,, what??????
    No DVD can withstand the power of DVDShrink along with AnyDVD!
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  4. 28th Apr 2004 07:05 #4
    FOO
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    He's talking about clipping luma levels. There's a word
    for that but I can't remember it.

    There are functions in Avisynth that will report Min , Max
    levels etc.
    Note that there is no way to tell the difference between video
    that has a Luma level of 16 , and one that had 0 and got clipped to 16

    I guess if you find a video that Never goes below 16 you might assume
    it was clipped
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  5. 28th Apr 2004 08:06 #5
    RoopeT
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    Sample avisynth script:

    Avisource("capture.avi")
    Histogram()

    Open the script in Virtual Dub and take a look of the histogram window.
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  6. 28th Apr 2004 10:47 #6
    Cobra
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    Isn't Basic YCbCr 0-255 and CCIR601 8 - 235?

    See Section IV of this link:

    https://www.videohelp.com/tmpgencexplained.htm

    Cobra

    Forum Rules :: PM me with any questions/problems/suggestions!
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  7. 28th Apr 2004 11:59 #7
    Suntan
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    ffdshow can give you on the fly historgam display as well as allow you to set clipping values, This may help you to "debug" your video stream.

    Other than that do a search on the avsforum. I know I have seen multiple threads on the topic of 0 255 vs 16 235.

    -Suntan
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  8. 28th Apr 2004 15:45 #8
    godslave
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    Which forum is the avs forum?
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  9. 28th Apr 2004 17:23 #9
    BJ_M
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    what a scope is for

    "Each problem that I solved became a rule which served afterwards to solve other problems." - Rene Descartes (1596-1650)
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  10. 29th Apr 2004 11:21 #10
    Suntan
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    @godslave

    http://www.avsforum.com

    -Suntan
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