[FFmpeg-user] Does FFmpeg support AVC-Intra (and/or x264) with 10bit bitdepth? (yuv422p10le)

[Christoph Gerstbauer]

Hello

I have problems to generate AVC Intra files with full 10bit encoding.
It shrinks automatically to yuv422p: Incompatible pixel format 
'yuv422p10le' for codec 'libx264', auto-selecting format 'yuv422p'

See complete command line here:

C:\Users\gersti>ffmpegnew -i I:\AVC-INTRA\00000_ffvhuff.avi -vcodec 
libx264 -g 1 -pix_fmt yuv422p10le -vb 100M -x264opts avcintra-class=100 
-x264opts colorprim=bt709 -x264opts transfer=bt709 -x264opts 
colormatrix=bt709 -threads 8 -vf "setfield=1" I:\AVC-INTRA\00000_ffvhuff.mxf
ffmpeg version N-72734-g5cf84e5 Copyright (c) 2000-2015 the FFmpeg 
developers
   built with gcc 4.9.2 (GCC)
   configuration: --enable-gpl --enable-version3 --disable-w32threads 
--enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r 
--enable-gnu
tls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b 
--enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme 
--enab
le-libgsm --enable-libilbc --enable-libmodplug --enable-libmfx 
--enable-libmp3lame --enable-libopencore-amrnb 
--enable-libopencore-amrwb --enable-libo
penjpeg --enable-libopus --enable-librtmp --enable-libschroedinger 
--enable-libsoxr --enable-libspeex --enable-libtheora 
--enable-libtwolame --enable-
libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc 
--enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp 
--enable-libx264 --en
able-libx265 --enable-libxavs --enable-libxvid --enable-lzma 
--enable-decklink --enable-zlib
   libavutil      54. 27.100 / 54. 27.100
   libavcodec     56. 41.100 / 56. 41.100
   libavformat    56. 35.101 / 56. 35.101
   libavdevice    56.  4.100 / 56.  4.100
   libavfilter     5. 16.101 /  5. 16.101
   libswscale      3.  1.101 /  3.  1.101
   libswresample   1.  2.100 /  1.  2.100
   libpostproc    53.  3.100 / 53.  3.100
Input #0, avi, from 'I:\AVC-INTRA\00000_ffvhuff.avi':
   Metadata:
     encoder         : Lavf55.48.101
   Duration: 00:00:10.00, start: 0.000000, bitrate: 874120 kb/s
     Stream #0:0: Video: ffvhuff (FFVH / 0x48564646), yuv422p10le, 
1920x1080, 877619 kb/s, 25 fps, 25 tbr, 25 tbn, 25 tbc
File 'I:\AVC-INTRA\00000_ffvhuff.mxf' already exists. Overwrite ? [y/N] y
Incompatible pixel format 'yuv422p10le' for codec 'libx264', 
auto-selecting format 'yuv422p'
[libx264 @ 0000000004c95400] using cpu capabilities: MMX2 SSE2Fast SSSE3 
SSE4.2
[libx264 @ 0000000004c95400] profile High 4:2:2 Intra, level 4.1, 4:2:2 
8-bit
Output #0, mxf, to 'I:\AVC-INTRA\00000_ffvhuff.mxf':
   Metadata:
     encoder         : Lavf56.35.101
     Stream #0:0: Video: h264 (libx264), yuv422p, 1920x1080, q=-1--1, 
100000 kb/s, 25 fps, 25 tbn, 25 tbc
     Metadata:
       encoder         : Lavc56.41.100 libx264
Stream mapping:
   Stream #0:0 -> #0:0 (ffvhuff (native) -> h264 (libx264))
Press [q] to stop, [?] for help
frame=  250 fps=9.6 q=-1.0 Lsize=  129227kB time=00:00:10.00 
bitrate=105862.4kbits/s
video:129022kB audio:0kB subtitle:0kB other streams:0kB global 
headers:0kB muxing overhead: 0.158273%
[libx264 @ 0000000004c95400] frame I:250   Avg QP:24.96  size:528476
[libx264 @ 0000000004c95400] mb I  I16..4:  6.4% 65.4% 28.3%
[libx264 @ 0000000004c95400] final ratefactor: 15.30
[libx264 @ 0000000004c95400] 8x8 transform intra:65.4%
[libx264 @ 0000000004c95400] coded y,uvDC,uvAC intra: 96.2% 98.9% 91.6%
[libx264 @ 0000000004c95400] i16 v,h,dc,p:  7% 33% 24% 37%
[libx264 @ 0000000004c95400] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 11% 17% 19%  
6%  7%  7%  9%  7% 16%
[libx264 @ 0000000004c95400] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 13% 19% 14%  
7%  8%  7% 10%  8% 13%
[libx264 @ 0000000004c95400] i8c dc,h,v,p: 54% 12% 19% 15%
[libx264 @ 0000000004c95400] kb/s:105695.11

Best Regards
Christoph