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#6581 | Link |
Registered User
Join Date: Feb 2015
Posts: 325
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For me the clip lighthouse_lossless.mp4 is interesting because of the sky -- it is challenging to encode this clip at low bitrates to be not annoying if you look at the sky. There are not sharp details -- it is about the gradients. PSNR is not perfect but for the sky it is OK.
For me at low bitrates aq-mode 1 is the least annoying, for medium bitrates aq-mode 3 is OK too. The default aq-mode 2 is not the best at low and medium bitrates with this clip (for me). Last edited by Ma; 2nd January 2019 at 19:06. Reason: Removed samples |
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#6583 | Link | |
Registered User
Join Date: Jul 2016
Posts: 161
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Quote:
even better, we can now mux DV layers (without re-encoding) into a mp4 file playable in my DV TV. https://extraimage.net/images/2018/1...71dc566510.png only work with AC3 / E-AC-3 / AC-4 / AAC audio though. https://github.com/DolbyLaboratories/dlb_mp4base Code:
mp4muxer --dv-profile 7 --input-file (baselayername.hevc1) --input-file (dvlayername.hevc2) --input-file (audio.ac3) --media-lang eng --output-file (nameofmovie).mp4 Last edited by imhh11; 31st December 2018 at 19:38. |
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#6584 | Link |
Life looks better in UHD
Join Date: Jun 2003
Location: Notts, UK
Posts: 11,754
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Actually, the new .MP4 muxer supports the following audio formats: Dolby Digital (AC-3), Dolby Digital Plus (E-AC-3) and Dolby AC-4 audio formats. Along with all AAC flavours.
Cheers
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| I've been testing hardware media playback devices and software A/V encoders and decoders since 2001 | My Network Layout & A/V Gear |
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#6585 | Link | |
Registered User
Join Date: Sep 2010
Location: Ukraine, Bohuslav
Posts: 265
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#6586 | Link |
Registered User
Join Date: Apr 2018
Posts: 1
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x265 delivers Dolby Vision streams!
Hello Everyone,
Our latest blog on Dolby Vision integration into x265 is out! Do check out the blog @ http://x265.org/x265-delivers-dolby-vision-streams/ |
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#6588 | Link | |
German doom9/Gleitz SuMo
Join Date: Oct 2001
Location: Germany, rural Altmark
Posts: 6,328
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#6589 | Link | |
Registered Loser
Join Date: Dec 2004
Posts: 115
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Quote:
I've extracted a secondary HEVC stream from a Dolby Vision UHD blu-ray with tsMuxer and tried to use that as the --dolby-vision-rpu parameter, but I'm guessing it's looking for something different. Encoder aborts about 5 seconds in. Code:
x265 [error]: Invalid Dolby Vision RPU size in POC 8218:19:24 |
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#6590 | Link | |
Registered User
Join Date: Dec 2014
Posts: 8
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Quote:
Looks like v3 will have a lot of new features. |
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#6591 | Link | |
Broadcast Encoder
Join Date: Nov 2013
Location: Germany
Posts: 1,236
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Quote:
Unfortunately I don't have any Dolby Vision file to extract the Dolby Vision RPU and fancy an encode, though.
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#6592 | Link | |
Life looks better in UHD
Join Date: Jun 2003
Location: Notts, UK
Posts: 11,754
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Quote:
I've been able to add audio Dolby Digital and AAC audio to it using a standard MP4Box build...
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| I've been testing hardware media playback devices and software A/V encoders and decoders since 2001 | My Network Layout & A/V Gear |
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#6593 | Link | |
Registered User
Join Date: Feb 2015
Posts: 325
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Quote:
--aq-mode --cutree --aq-motion All of them penalize CU with butterfly and the result is extremely low quality in one place. It should be some limit in x265 that if all 3 functions penalize one place, the applied quality penalty is not bigger than some MAX_PENALTY. As a workaround we could use only 2 of these 3 functions and/or lower aq-strength. |
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#6594 | Link | |
Registered User
Join Date: May 2005
Posts: 1,372
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Quote:
![]() If I understood the process right, I'm most interested in 'Profile 8.2 single layer with SDR compatibility' myself, as any extra layer that can be used for a better HDR->SDR conversion, will be very welcome. I guess this also means you guys have 'cracked' the DV layer, and it's now known how to handle the meta-data therein, right? Bit off-topic, perhaps, but I wouldn't mind seeing DV SDR layer info getting added to x264 too, one day (after all, x264 has always been predominantly about 8-bit).
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#6595 | Link | |
Moderator
![]() Join Date: Jan 2006
Location: Portland, OR
Posts: 3,472
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#6596 | Link | |
Moderator
![]() Join Date: Jan 2006
Location: Portland, OR
Posts: 3,472
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Quote:
That said, aq-motion is still experimental. I wouldn't trust it as a "Default On" feature without a lot of testing. |
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#6597 | Link | |
Moderator
![]() Join Date: Jan 2006
Location: Portland, OR
Posts: 3,472
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#6598 | Link | |
Moderator
![]() Join Date: Jan 2006
Location: Portland, OR
Posts: 3,472
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Quote:
x265 [warning]: hevc-aq enabled, disabling other aq-modes This is confusing syntax. We really should have aq-mode 4 and 5. aq-mode 4 would be HEVC-AQ, and 5 would be HEVC-AQ with low luma bias (like aq-mode 3 versus 2). The need for low-luma bias is content dependent, and we shouldn't be locked into one or another. Also I am getting VBV violations multiple times a second. From the first two seconds of my test clip: x265 [warning]: poc:0, VBV underflow (-2596808 bits) x265 [warning]: poc:8, VBV underflow (-13025705 bits):06:32 x265 [warning]: poc:4, VBV underflow (-13047849 bits):38:49 x265 [warning]: poc:16, VBV underflow (-12824903 bits)11:58 x265 [warning]: poc:12, VBV underflow (-12960465 bits):23:11 x265 [warning]: poc:24, VBV underflow (-12939991 bits)27:49 x265 [warning]: poc:20, VBV underflow (-13441281 bits):34:43 x265 [warning]: poc:32, VBV underflow (-12651471 bits)23:47 x265 [warning]: poc:28, VBV underflow (-12985385 bits):28:15 x265 [warning]: poc:40, VBV underflow (-12559455 bits)20:36 x265 [warning]: poc:36, VBV underflow (-13122593 bits)24:13 Was the Experimental Feature tag left off for HEVC-AQ? I love the idea of improved AQ, but it would be good to have a clear indication in the help text about how close to production ready this feature is. |
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#6599 | Link | ||
Moderator
![]() Join Date: Jan 2006
Location: Portland, OR
Posts: 3,472
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Quote:
Quote:
But encoding isn't the hard part. The hard part is the shaping, inverse tone mapping, and metadata generation. Profile 8.1 is only easy because uncompressed HDR-10 is pretty much the raw format of a DoVi master (plus metadata). x26? doesn't even attempt to implement the complex tech required to do a good job converting between color volumes. |
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#6600 | Link | |
Registered User
Join Date: May 2005
Posts: 1,372
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Quote:
Thanks for the great explanations! ![]()
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