oh man, that bluray looks so terrible, and your regrades so wonderful!
Just to nitpick, haven’t we clarified that the blu-ray always looks much more purple and terrible once the frames have been processed in any way? I mean, they still have crappy blue-ish grading, and Dre’s is a million times better. But it doesn’t look as bad as the frame grabs often suggest.
I forget who finally worked this out. Williarob or Neverar maybe? It unfortunately gives a little bit of credit to the pro-SE/PT trolls who have claimed, in the past, that our comparisons exaggerate the BD’s flaws.
It was an issue that I noticed when exporting video from Premiere, and again when uploading to youtube or vimeo. I think it has to do with Rec 601 vs Rec 709 decoding confusion. But if you just pulled the video into any video editor, did a frame grab from that program (or just frame grabbed from VLC), and uploaded it as a still image, then it should be an accurate representation. The blu-ray really is that purple.
I’m sorry to bang on about this again, as anyone that puts up with my rants will know that I have been on about this before, but it is corect that if you pull a frame from the Blu-ray, and compress it and upload it and view it on a PC, then the colour will be way, way different to how it looks on a television.
Leaving out the problem that most people do not calibrate their computer monitors at all, the colourspace of the Blu-ray or DVD and your television is completely different to the colourspace on your computer monitor/graphics card combination.
Also, different browsers and playback software can even display colours differently, some programs use the ICC profile incorrectly or not at all, which gives even greater differences.
This is why we use a broadcast monitor (or calibrated television) hooked up to a dedicated Broadcast output card when colour correcting, as what you see on your PC screen has little correlation colour-wise to how it looks on a television.
The only way to properly judge the colour of a BD, or the results of a colour correction is to encode and play it back on a TV or via an output card to a TV (such as a Blackmagic card).
An output card bypasses the ICC profiles and drivers of your OS, and delivers the correct colourpace file directly to a TV or broadcast monitor that uses the matching colourspace, gamma etc.
Then of course you also need to have calibrated the TV to ensure the colour looks as it should, before being able to judge the colour accurately.
If you rip some frames from a Blu-ray, import them into a video editor with the correct colourspace settings and then output them with the correct LUT to convert it to the colourspace, gamma etc. being used on your PC then you get in the ballpark, but again, the software you then use to view it will often screw up the colours anyway.
If you want to judge the BD colours, calibrate your TV and watch it on a decent BD player, or via a broadcast output card to your television. Everything else is pretty much a crapshoot when it comes to colour.