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28th December 2017, 10:54 | #2 | Link |
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you'd get much less banding in your encode in 10 bit. x265 still suffers too much from that when using 8 bit. Your input doesn't matter much what bit depth it has (8 or 10)
do note that a lot of gear still doesn't support 10 bit yet, computers excluded. If you have a HW decoder that can deal with 10 bit, displaying it on an 8 bit display (like a TV) is not an issue. If your TV is 10 bit, even better Last edited by microchip8; 28th December 2017 at 10:58. |
29th December 2017, 19:17 | #3 | Link | |
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1. better compression 2. no banding through compression precision Con: 1. higher compression complexity -> potentially more cpu usage 2. higher decoding complexity -> potentially more cpu usage 3. not all decoders support it Personally I only encode in 10bit,.. Cu Selur |
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30th December 2017, 22:59 | #4 | Link |
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I did a test on a 8 bit TV-episode encoded with x265 10 bit (Preset Medium) CRF 19 and compared it to a 8 bit encoding (same preset and crf) and I couldnt see any difference, but the file size came out 200 mb bigger for the 10 bit encode. Is there a video (Youtube ?) that will show the difference of 10 bit encoding on a 8 bit source compared to a 8 bit encoding of the same source ?
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31st December 2017, 03:04 | #5 | Link |
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There are actually some video blogs that will point you in the direction you are looking. You can quickly google something like benefits of 10 bit x265 encoding. What you will be looking for is things that you can see only in frame by frame comparisons really, and in areas where there would normally be lots of dithering, like clouds and leaves and backgrounds. Information that would easily be lost. The 10bit profile makes it less objectionable when dealing with gradients.
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31st December 2017, 10:03 | #6 | Link | |
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CRF in 10bit can be lower(quality) compared to 8bit. CRF19 in 8bit, you can go CRF 21-23 in 10bit.
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31st December 2017, 16:12 | #7 | Link | |
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How can that be ? |
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31st December 2017, 20:06 | #8 | Link |
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31st December 2017, 22:33 | #9 | Link | |
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usually in x264 10bit can avoid banding, on x265 it's a bit different, better quality but isn't banding-free. always compare 2 pass vs 2 pass at the same bitrate
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1st January 2018, 01:13 | #10 | Link | |
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However, if you only ever intend to have your encodes played on new 10-bit capable hardware, then you should unequivocally encode in 10-bits at all times, for all of the reasons that everyone has mentioned. The tangible benefits of 10-bit encoding will exist forever, but the ephemeral problems of compatibility will vanish once hardware that supports 10-bit formats becomes commonplace. Just look at the spec sheets for existing 2017 models, and upcoming 2018 models. So, simple choice: are you held hostage by ageing hardware, or are you free to explore the best possible options? |
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1st January 2018, 07:44 | #11 | Link |
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Sadly 10-bit H.264 will probably never be supported by decoding hardware.
Happily most mobile devices will probably be able to do software decoding of 10-bit H.264, albeit while using a lot more power.
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1st January 2018, 18:05 | #13 | Link | |
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x264 is still getting updates, but you can still just use a few builds older than the latest version and not look back for archival purposes. Dollars to donuts, if it's not going to have HDR in the end result, I'd rather go with x264. It'll be some time before I upgrade any piece of hardware to natively decode HEVC without framedrops. I'm not much for standalone hardware or media players, so I use my PC more often. And I have yet to upgrade my graphics card to support the 4K HDR movies and then I still have to upgrade my CPU to handle all that far better, but I think if I want to upgrade my CPU to one of the newest generations out there, I'd have to upgrade my mother board, and if I'm going to upgrade my motherboard, I might as well get one that supports better RAM and get a new case for it as well. And maybe look into water cooling. For my personal case? No HDR? Then go x264 hi10p. Blurays to hi10p is sufficient enough until I up my game to start working on the 4K BD's, by which time, hopefully x265 will be on par. And, true, it's far more improved since a few years ago. But, alas, I have miles and miles to go before I sleep.
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2nd January 2018, 22:33 | #15 | Link |
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Sounds like unrealistic expectations to me...
An encode cannot be better than it's source. It might look more pleasing in some regard (e.g. smoothed gradations by means of dithering) - but it will never be better. If you are getting large filesizes, you are... a) encoding a source that is already (highly) compressed or b) using the wrong settings / targets or c) expecting too much. |
2nd January 2018, 22:40 | #16 | Link | |
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post your settings, if you will |
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3rd January 2018, 02:57 | #19 | Link | |
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moreover h264 10bit hw support doesn't exist and luckily will not.
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3rd January 2018, 03:16 | #20 | Link | |
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I should start with the UHD drive first.
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