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  1. Originally Posted by davexnet View Post
    Originally Posted by setup View Post
    Originally Posted by manolito View Post
    Originally Posted by setup View Post
    interesting, but how can you quickly check what color profile the source video is using? like through VLC media player or something else which involves minimal effort
    thanks
    The problem is that you really can't...

    The two apps which analyze videos are MediaInfo and FFProbe. But they both can only report how the files are flagged in the MetaData headers. The rule of thumb has always been that SD is Rec.601 and HD is Rec.709. Most players will not even try to analyze such flags, instead they simply look at the resolution and set the colors accordingly.

    It really gets complicated if your source is an UHD file with HDR (High Dynamic Resolution). Such files use Rec.2020 as their color profile, and ColorMatrix cannot convert this correctly. Converting HDR to SDR is not trivial, the color conversion is not just a linear function. Instead LUTs (Look Up Tables) are used, plus there are a couple of different conversion modes named after their inventors (Reinhard, Hable and some more).

    This does not mean that it cannot be done, if you ever run into such a source just let me know (if you are adventurous enough to install AVS+ and LSMASH).

    For your original question, the only way to make sure that your converted colors are correct is to make a test conversion using only a short segment of the source and compare the outcome with the source. Trial and error...

    yes, what you say makes sense.

    but anyway, the problem seems to be something different all together, rather than the type of colors a video file is using.
    the dull saturation is still present even if i ensure that avisynth is using colormatrix. maybe its a limitation of the DVD video format itself (mpeg2 i think?) but i hesitate on putting full blame on it.
    i really wish this was more simple. this is much more work than i want to do for DVD burning, but the colors do look noticeably different. im using various 264/265 video sources and the color difference is just too much for me to accept... i feel that hcenc 2pass could look better than this
    This can happen if the source is HDR (as mentioned above by manolito),
    because the program does not do the color map necessary for HDR > rec.601 SD conversion
    You can open your source in mediainfo, text view, and probably confirm the HDR there, or you post a clip to the forum

    yes, i understand this. avisynth is doing the colormatrix from rec7 to rec6, i manually ensure avisynth is properly doing this from source files which i know are in rec7. but the finished DVD video color is still always more bland.
    what im thinking is that perhaps rec6 is just not as robust, or perhaps there is something else causing the issue. not exactly sure. but i definitely do feel some kind of color adjustment is needed. it would be nice if there was a simple and intuitive way to adjust RGB
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  2. Member manolito's Avatar
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    Like davexnet said, more info about your source files is needed. We need the MediaInfo report, and maybe you can also cut out a short segment of one of these sources and upload it...

    It is quite unlikely that the encoder has anything to do with this problem.
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  3. Originally Posted by manolito View Post
    Like davexnet said, more info about your source files is needed. We need the MediaInfo report, and maybe you can also cut out a short segment of one of these sources and upload it...

    It is quite unlikely that the encoder has anything to do with this problem.
    bro im using RARBG 264/265 files...
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    Originally Posted by setup View Post
    Originally Posted by manolito View Post
    Like davexnet said, more info about your source files is needed. We need the MediaInfo report, and maybe you can also cut out a short segment of one of these sources and upload it...

    It is quite unlikely that the encoder has anything to do with this problem.
    bro im using RARBG 264/265 files...
    There's no need to divulge that. Just get the mediainfo report for the file (text view)
    and hide the file name. It's as simple as that. Post it here
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  5. Originally Posted by davexnet View Post
    Originally Posted by setup View Post
    Originally Posted by manolito View Post
    Like davexnet said, more info about your source files is needed. We need the MediaInfo report, and maybe you can also cut out a short segment of one of these sources and upload it...

    It is quite unlikely that the encoder has anything to do with this problem.
    bro im using RARBG 264/265 files...
    There's no need to divulge that. Just get the mediainfo report for the file (text view)
    and hide the file name. It's as simple as that. Post it here
    right, im purposely trying to avoid doing this. lets just assume that the majority of video files i have already tested have all been proper encodes of 1080p blueray media and are without a doubt in rec7.
    these are popular types of files which are widely known by others across the internet. but ive also tried other sources, and my results are all consistent. i ddnt wish to seem unappreciative of your help, i just dont believe in doing things which are almost completely unnecessary
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    If I can't see the specs of the file I can't help you, sorry.

    There may be another way, if we start out with a known good rec709 file. Here's a test file,
    encode this in the program, set the output (button at the top) to muxed mpg and see if it comes out OK.
    Save the log file and the output mpg for possible posting here.
    Image Attached Files
    Last edited by davexnet; 7th May 2021 at 19:49.
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  7. Originally Posted by davexnet View Post
    If I can't see the specs of the file I can't help you, sorry.

    There may be another way, if we start out with a known good rec709 file. Here's a test file,
    encode this in the program, set the output (button at the top) to muxed mpg and see if it comes out OK.
    Save the log file and the output mpg for possible posting here.
    yes, ive cheked them myself. they are positively 100% rec7 encodes. and everything else about these files are normal too...
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  8. Member manolito's Avatar
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    Originally Posted by setup View Post
    yes, ive cheked them myself. they are positively 100% rec7 encodes
    How did you check this? Did MediaInfo report this, or do you have some other method to determine the color metrics of a video?
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  9. Originally Posted by manolito View Post
    Originally Posted by setup View Post
    yes, ive cheked them myself. they are positively 100% rec7 encodes
    How did you check this? Did MediaInfo report this, or do you have some other method to determine the color metrics of a video?
    Perhaps I do, are you perhaps doubting me?
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