[FFmpeg-trac] #3409(undetermined:new): Impossible to transcode full range RGB videos with libx264, and keep full range + proper colors

[FFmpeg]

#3409: Impossible to transcode full range RGB videos with libx264, and keep full
range + proper colors
-------------------------------------+-------------------------------------
             Reporter:  mzso         |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------

Comment (by mzso):

 Something like this? (Didn't think it shows anything useful)

 E:\Videó Felvételek>ffmpeg -i "E:\Videó Felvételek\input.avi"  -acodec
 copy -vcodec libx264 -preset ultrafast -crf 20 -color_range 2 -pix_fmt
 yuv444p  out.mkv
 ffmpeg version N-60813-g44b22bb Copyright (c) 2000-2014 the FFmpeg
 developers
   built on Feb 22 2014 03:11:45 with gcc 4.8.2 (GCC)
   configuration: --enable-gpl --enable-version3 --disable-w32threads
 --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
 --enable-gnutls --enab
 le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-
 libfreetype --enable-libgsm --enable-libilbc --enable-libmodplug --enable-
 libmp3lame --ena
 ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
 --enable-libopus --enable-librtmp --enable-libschroedinger --enable-
 libsoxr --enable-libsp
 eex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-
 libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
 --enable-libwavp
 ack --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid
 --enable-zlib
   libavutil      52. 65.100 / 52. 65.100
   libavcodec     55. 52.102 / 55. 52.102
   libavformat    55. 33.100 / 55. 33.100
   libavdevice    55. 10.100 / 55. 10.100
   libavfilter     4.  1.103 /  4.  1.103
   libswscale      2.  5.101 /  2.  5.101
   libswresample   0. 17.104 /  0. 17.104
   libpostproc    52.  3.100 / 52.  3.100
 Input #0, avi, from 'E:\Vide├│ Felv├ętelek\input.avi':
   Duration: 00:00:27.27, start: 0.000000, bitrate: 405890 kb/s
     Stream #0:0: Video: utvideo (ULRG / 0x47524C55), rgb24, 1920x1200, 30
 fps, 30 tbr, 30 tbn, 30 tbc
     Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 7.1,
 s16, 5644 kb/s
 [libx264 @ 029370e0] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64
 SlowShuffle
 [libx264 @ 029370e0] profile High 4:4:4 Predictive, level 5.0, 4:4:4 8-bit
 [libx264 @ 029370e0] 264 - core 142 r2389 956c8d8 - H.264/MPEG-4 AVC codec
 - Copyleft 2003-2014 - http://www.videolan.org/x264.html - options:
 cabac=0 ref=1 deb
 lock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0
 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11
 fast_pskip=1 chroma_qp_
 offset=6 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1
 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0
 keyint=250 keyint_m
 in=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=20.0 qcomp=0.60
 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
 Output #0, matroska, to 'out.mkv':
   Metadata:
     encoder         : Lavf55.33.100
     Stream #0:0: Video: h264 (libx264) (H264 / 0x34363248), yuv444p(pc),
 1920x1200, q=-1--1, 1k tbn, 30 tbc
     Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 7.1,
 5644 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (utvideo -> libx264)
   Stream #0:1 -> #0:1 (copy)
 Press [q] to stop, [?] for help
 frame=  533 fps= 13 q=-1.0 Lsize=   84544kB time=00:00:27.26
 bitrate=25400.1kbits/s
 video:65784kB audio:18742kB subtitle:0 data:0 global headers:0kB muxing
 overhead 0.020164%
 [libx264 @ 029370e0] frame I:3     Avg QP:17.00  size:430087
 [libx264 @ 029370e0] frame P:530   Avg QP:19.47  size:124665
 [libx264 @ 029370e0] mb I  I16..4: 100.0%  0.0%  0.0%
 [libx264 @ 029370e0] mb P  I16..4: 16.0%  0.0%  0.0%  P16..4: 47.2%  0.0%
 0.0%  0.0%  0.0%    skip:36.8%
 [libx264 @ 029370e0] coded y,u,v intra: 45.4% 3.6% 4.0% inter: 35.0% 3.6%
 3.4%
 [libx264 @ 029370e0] i16 v,h,dc,p: 34% 31% 24% 11%
 [libx264 @ 029370e0] kb/s:19739.97

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Ticket URL: <https://trac.ffmpeg.org/ticket/3409#comment:2>
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