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3rd December 2019, 13:38 | #1 | Link | |
Herr
Join Date: Apr 2009
Location: North Europe
Posts: 556
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x265: Should I set Blu-ray settings?
I wonder, should I always set,
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3rd December 2019, 14:06 | #2 | Link | |
Lost my old account :(
Join Date: Jul 2017
Posts: 322
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So for example if you set --range limited for an source that is full range without converting it to limited range, you will get incorrect levels on playback. Last edited by excellentswordfight; 3rd December 2019 at 14:08. |
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3rd December 2019, 19:56 | #3 | Link |
Herr
Join Date: Apr 2009
Location: North Europe
Posts: 556
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I want the reencode to be as close to the source as possible. Sometimes, those flags are not listed at all in the source Blu-ray though. Should I not set those flags when they're not set in the HD Blu-ray source-video?
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3rd December 2019, 20:44 | #4 | Link |
ffx264/ffhevc author
Join Date: May 2007
Location: /dev/video0
Posts: 1,843
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From my experience, virtually all Full HD Blu-rays come in BT709 colorspace, even if mediainfo reports nothing (there are other ways to find out but I only have tools for Linux). The color range is a bit more tricky and needs to be set on a per-file basis
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3rd December 2019, 22:03 | #5 | Link |
Herr
Join Date: Apr 2009
Location: North Europe
Posts: 556
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Thanks froggy1, I'll make frame-comparisons then (when color range is not set in Full HD Blu-rays source when I look in MediaInfo).
EDIT: Thanks FranceBB too! Last edited by Forteen88; 11th December 2019 at 17:28. Reason: thanking |
6th December 2019, 21:55 | #6 | Link | |
Broadcast Encoder
Join Date: Nov 2013
Location: Royal Borough of Kensington & Chelsea, UK
Posts: 2,883
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The vast majority of FULL HD H.264 BD are in Limited TV Range 16-235 8bit as it's often required to pass the QC, anyway you can check it with Histogram() or with VideoTek() which will show you the waveform. The big fat brown "lines" show you the border of the 16-235 limit and if the waveform stays inside those brackets, then it's Limited, if it goes outside, then it's probably Full. The bottom shows the black level, the top shows the white level. This is for Luma, for Chroma is pretty much the same, but you'll have to check the circle with the colors in it instead. Below you'll find two frames shot with my crappy camera a few days ago in Berlin: Full Range (8bit) 0-255: Limited TV Range (8bit) 16-235: As to the colormatrix, there are others ways in which you can check whether they mastered it in BT709 or not, but it's almost always the case that they used BT709. By the way, if you don't specify anything, the decoder will have to guess and the vast majority of decoders guess BT601 for SD and BT709 for HD and FULL HD. Last edited by FranceBB; 6th December 2019 at 21:57. |
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