VideoHelp Forum

Our website is made possible by displaying online advertisements to our visitors. Consider supporting us by disable your adblocker or Try ConvertXtoDVD and convert all your movies to DVD. Free trial ! :)
+ Reply to Thread
Results 1 to 5 of 5
Thread
  1. Member
    Join Date
    Aug 2015
    Location
    Quebec, Canada
    Search PM
    Here is the situation, I have old TV-Show DVD (dating back to 2002), they never been re-released (and probably never will) and the colors are clearly wrong (way too dark or simply flat).

    I there a codec(s) with avisynth that can correct that to a normal standard (I mean automatic way) ?

    I've searched and found codec autolevel and HDRAGC but not sure if it's the good way.

    Thanks

    kalemvar1
    Quote Quote  
  2. There is no such thing as a 'normal standard', but using AutoAdjust (https://forum.doom9.org/showthread.php?t=167573) and tweaking the settings to your liking might help. SmoothAdjust (https://forum.doom9.org/showthread.php?t=154971) might also be interesting.

    Cu Selur
    users currently on my ignore list: deadrats, Stears555
    Quote Quote  
  3. ColorYUV() has autogain and autowhite options: ColorYUV(autogain=true, autowhite=true). But you're usually better off doing manual adjustments.
    Quote Quote  
  4. Member
    Join Date
    May 2014
    Location
    Memphis TN, US
    Search PM
    Originally Posted by kalemvar1 View Post
    I've searched and found codec autolevel and HDRAGC but not sure if it's the good way.
    Autolevel and HDRAGC aren't "codecs". They're luminance level adjusting filters. Sometimes they work well, sometime they don't work so well, and they always require that you learn to adjust their operating parameters for best results. Neither of those filters will correct colors.


    As jagabo suggested, ColorYUV() and the Tweak() functions are suggested form manual adjustment, which usually works better anyway. Learn tom work with histograms so you can look at data graphs to know what you're doing.
    http://avisynth.nl/index.php/ColorYUV
    http://avisynth.nl/index.php/Tweak
    http://avisynth.nl/index.php/Histogram


    It would be more helpful if you could post a short sample from the video you're working with. No one is going to try to guess what your video looks like or what settings to suggest. How to make video samples from DVD or MPG using DGindex: https://forum.videohelp.com/threads/359295-Record-without-interlacing/page2#post2272359.
    - My sister Ann's brother
    Quote Quote  
  5. There is also RGBAdjust() and Levels(). Some corrections need to be done in YUV, others in RGB. Some YUV operations can only be done in ColorYUV(), others in Tweak().

    If you upload a sample, be sure to include shots with a range of brightnesses, multiple colors, and things where we have some idea what the colors should be.
    Quote Quote  



Similar Threads