[FFmpeg-user] Dolby Vision
Mark Himsley
mark.himsley at gmail.com
Sat Dec 7 16:42:38 EET 2019
Hi,
There are some 4K Dolby Vision files around, like the one linked to
directly from this page of this site, which are not decoded with the
correct colours using git master head FFmpeg (compiled last weekend).
https://4kmedia.org/lg-amaze-dolby-vision-uhd-4k-demo/
When I play the file downloaded from that page on an VG 4K Dolby
Vision capable TV it plays correctly with the right colours, but the
colours are way wrong when decoded/converted with FFmpeg.
Should I be expecting Dolby Vision files to decode correctly? I mean,
it's very close, but just not quite right.
Thanks :-)
Example command line:
$ ffmpeg -i 'LG Amaze Dolby Vision UHD 4K Demo.ts' -sws_flags lanczos
-filter:v "scale=1920:1080:interl=0,format=yuv420p" -c:v libx264 -crf
18 -an -y out.mkv
ffmpeg version N-95915-g18507b4-shared_linux_x86_64_201911301603
Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.12) 20160609
configuration: --extra-version=shared_linux_x86_64_201911301603
--extra-cflags=' ' --extra-libs=' -lpthread -lm' --pkg-config-flags=
--cross-prefix= --arch=x86_64 --target-os=linux --prefix=/opt/ffbuild
--enable-gpl --enable-version3 --enable-nonfree --disable-ffplay
--disable-dxva2 --enable-libxml2 --enable-openssl --enable-libmp3lame
--enable-libspeex --enable-libtheora --enable-libvorbis
--enable-libopus --enable-libxvid --enable-libvpx --enable-libfdk-aac
--enable-libx264 --enable-libx265 --enable-libopenjpeg --enable-libaom
--enable-libxcb --enable-decklink
libavutil 56. 36.101 / 56. 36.101
libavcodec 58. 64.101 / 58. 64.101
libavformat 58. 35.100 / 58. 35.100
libavdevice 58. 9.101 / 58. 9.101
libavfilter 7. 67.100 / 7. 67.100
libswscale 5. 6.100 / 5. 6.100
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
[hevc @ 0x37c9ec0] Skipping NAL unit 62
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'LG Amaze Dolby Vision UHD 4K Demo.ts':
Metadata:
major_brand : mp42
minor_version : 1
compatible_brands: mp42dby1isom
creation_time : 2017-04-13T20:09:18.000000Z
Duration: 00:00:56.20, start: 0.000000, bitrate: 28362 kb/s
Stream #0:0(und): Video: hevc (Main 10) (dvhe / 0x65687664),
yuv420p10le(tv), 3840x2160 [SAR 1:1 DAR 16:9], 27713 kb/s, 60 fps, 60
tbr, 60k tbn, 60 tbc (default)
Metadata:
creation_time : 2017-04-13T20:09:18.000000Z
handler_name : video handler
encoder : DOVI Coding
Stream #0:1(und): Audio: eac3 (ec-3 / 0x332D6365), 48000 Hz,
5.1(side), fltp, 640 kb/s (default)
Metadata:
creation_time : 2017-04-13T20:09:18.000000Z
handler_name : sound handler
Side data:
audio service type: main
Stream mapping:
Stream #0:0 -> #0:0 (hevc (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[hevc @ 0x37f3380] Skipping NAL unit 62
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[libx264 @ 0x37f2940] using SAR=1/1
[libx264 @ 0x37f2940] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[hevc @ 0x380ce80] Skipping NAL unit 62
[libx264 @ 0x37f2940] profile Progressive High, level 4.2, 4:2:0, 8-bit
[libx264 @ 0x37f2940] 264 - core 157 r2969 d4099dd - H.264/MPEG-4 AVC
codec - Copyleft 2003-2019 - http://www.videolan.org/x264.html -
options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7
psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1
8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2
threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1
interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2
b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250
keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf
mbtree=1 crf=18.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40
aq=1:1.00
Output #0, matroska, to 'out.mkv':
Metadata:
major_brand : mp42
minor_version : 1
compatible_brands: mp42dby1isom
encoder : Lavf58.35.100
Stream #0:0(und): Video: h264 (libx264) (H264 / 0x34363248),
yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 60 fps, 1k tbn, 60 tbc
(default)
Metadata:
creation_time : 2017-04-13T20:09:18.000000Z
handler_name : video handler
encoder : Lavc58.64.101 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
[hevc @ 0x385de80] Skipping NAL unit 62
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speed= 0x
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speed= 0x
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[hevc @ 0x37fa1c0] Skipping NAL unit 621kB time=00:00:00.06 bitrate=
99.4kbits/s speed=0.0442x
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<SNIP - nothing interesting in here>
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[hevc @ 0x37f3380] Skipping NAL unit 624kB time=00:00:54.95
bitrate=27572.6kbits/s speed=0.292x
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frame= 3372 fps= 18 q=-1.0 Lsize= 184967kB time=00:00:56.15
bitrate=26985.2kbits/s speed=0.296x
video:184940kB audio:0kB subtitle:0kB other streams:0kB global
headers:0kB muxing overhead: 0.014368%
[libx264 @ 0x37f2940] frame I:23 Avg QP:17.12 size:372237
[libx264 @ 0x37f2940] frame P:1397 Avg QP:21.18 size:103814
[libx264 @ 0x37f2940] frame B:1952 Avg QP:25.00 size: 18334
[libx264 @ 0x37f2940] consecutive B-frames: 22.3% 1.2% 1.1% 75.4%
[libx264 @ 0x37f2940] mb I I16..4: 22.5% 50.1% 27.3%
[libx264 @ 0x37f2940] mb P I16..4: 0.7% 5.0% 1.1% P16..4: 42.2%
13.8% 13.0% 0.0% 0.0% skip:24.2%
[libx264 @ 0x37f2940] mb B I16..4: 0.1% 0.7% 0.5% B16..8: 29.7%
3.9% 1.9% direct: 3.3% skip:59.9% L0:34.9% L1:50.8% BI:14.3%
[libx264 @ 0x37f2940] 8x8 transform intra:66.6% inter:58.6%
[libx264 @ 0x37f2940] coded y,uvDC,uvAC intra: 83.7% 60.1% 24.9%
inter: 23.1% 16.1% 6.0%
[libx264 @ 0x37f2940] i16 v,h,dc,p: 41% 16% 7% 36%
[libx264 @ 0x37f2940] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 11% 19% 14% 6%
10% 7% 14% 7% 13%
[libx264 @ 0x37f2940] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 13% 17% 11% 7%
12% 9% 13% 7% 11%
[libx264 @ 0x37f2940] i8c dc,h,v,p: 63% 19% 13% 5%
[libx264 @ 0x37f2940] Weighted P-Frames: Y:8.7% UV:5.0%
[libx264 @ 0x37f2940] ref P L0: 68.6% 13.3% 11.9% 6.1% 0.1%
[libx264 @ 0x37f2940] ref B L0: 88.4% 9.2% 2.4%
[libx264 @ 0x37f2940] ref B L1: 93.4% 6.6%
[libx264 @ 0x37f2940] kb/s:26957.74
--
Mark Himsley
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