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17th January 2006, 10:04 | #161 | Link | |
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This surprised me because after a bit of searching I found that DV is supposed to be Rec.601 while HC expects its input to be Rec.709, so I would have thought that a conversion rec601->rec709 would be required before feeding HC. So I then tried passing the original DV AVI file through a colormatrix 601 to 709 conversion and displayed this in VirtualDub alongside the original DV file (without colormatrix conversion). They looked almost identical too. Neither looked darker than the other. I did notice that on frames with intense red/orange these areas seemed slight darker or perhaps just more saturated on the 601->709 converted footage. This was the first time I have tried colormatrix and I was expecting to see a slightly more noticeable difference. Anyway it looks like for PAL DV at least I don't need to use colormatrix - but I'm not sure why. |
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17th January 2006, 10:43 | #162 | Link | ||
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21st January 2006, 02:44 | #163 | Link |
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ColorMatrix - HDTV Usage
I have HD content that I am encoding to DVD using CCE 2.70, and was looking into using ColorMatrix on my sources.
DGIndex reports back a Colorimetry = ITU-R BT. 701 (1) CCE also, by default, assumes ITU-R BT. 701 (1) coefficients correct? So, is there any reason to still use ColorMatrix? Or do I have it all wrong? |
21st January 2006, 17:39 | #165 | Link | |
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24th January 2006, 15:57 | #167 | Link |
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B/W movies and ColorMatrix() as default.
I have an old Samurai movie in B/W, when encoded with Xvid it looks a bit too bright and washed out, DGIndex is reporting the colorimetry as "ITU-R BT.470-2" and the frame type seems hybrid(it changes from Interlace to Progressive constantly). By adding ColorMatrix() to the script my encode looks acceptable, but I have a couple of questions:
Is the default command ColorMatrix() all I need or should I include some other settings? Should I add ColorMatrix() to all my future encodes? |
24th January 2006, 21:09 | #170 | Link |
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That's a job for Limiter()..I'm sure using it is faster than using ColorMatrix with B/W stuff.
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31st January 2006, 22:45 | #173 | Link |
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I am just going AVISynth to MeGUI/x264 CLI. Another thing I just noticed is that when I preview the VOB in DGIndex it says BT.709, but after it finishes creating a d2v project file it says SMPTE 170M. So what would be the proper settings for me to use?
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31st January 2006, 23:33 | #174 | Link | |
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1st February 2006, 05:37 | #176 | Link |
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Is there a definitive way to tell which of these colorimetries is correct?
BTW, when I try to use ColorMatrix(d2v="VTS_01_1.d2v") it tells me that multiple colorimetry types were detected in the d2v file. Last edited by Oline 61; 1st February 2006 at 05:40. |
1st February 2006, 10:44 | #177 | Link | |
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If that's indeed the case, i would apply ColorMatrix to the whole movie (it doesn't do anything when a frame is black, since it corrects chroma). |
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1st February 2006, 21:30 | #179 | Link |
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Another option is to enable hints output in MPEG2Source and set ColorMatrix accordingly.
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6th February 2006, 10:54 | #180 | Link |
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After going through this entire thread I am trying to tabularise the colormatrix usage for Divx/Xvid conversion.
Anything -> Divx/Xvid ------------------------ Source Colorimetry--------ColorMatrix ITU-R BT.470-----------------No ITU-R BT.601-----------------No ITU-R BT.709-----------------Yes SMPTE 170 M-----------------No SMPTE 240 M-----------------Yes Please feel free to correct it. Thanks |
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