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milanesa

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Everything posted by milanesa

  1. Some of this stuff definitely goes over my head. I do see a chroma (hue) shift (specially in the reds and warm colors) when I change from 709 to 601... that's why I assumed that it was a gamut related setting. Obviously, in the case of my GH1 clips, 709 looks more natural and pleasant.
  2. [quote name='yellow' timestamp='1343918022' post='14845'] There are a couple of ways rec709 & 601 are discussed: 1. Color primaries and color matrix. BT601 color primaries differ from BT709 but unless shooting DV (ie BT601) then HD video is BT709 color primaries. This has nothing to do with levels ranges but color gamut. 2. Color Matrix (Luma Coeffs). The color matrix only comes into play when converting a YCbCr (YCC for short) source file to RGB. Getting the wrong color matrix means a slight contrast change (not as drastic as 16 - 235 <> 0 - 255) and a
  3. [quote name='AdR' timestamp='1343884351' post='14816'] That's part of the problem, especially with h.264 footage, because many apps scale the luma when they see the h.264 flag in the meta data. The two methods I've used are: (1) Open the files in QT7 (which I have heard ignores scaling flags), then take a screengrab and open in photoshop. Use Info Window and Levels histogram to determine luma scale. (2) Set up AE CS6 with color space of Adobe RGB(1998), and import .mts file, then use Synthetic Aperture for scopes and histograms. (I believe using Adob
  4. So, what would be a good workflow? I recently loaded a few .mts clips from my GH1 on a SCRATCH system running on Mac. SCRATCH has the option to recover the full color range of the clips. They also played smoothly... but didn't spend to much time on it.
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