[FFmpeg-user] DPX bit depth.

[tim nicholson]

The default -pix_fmt for dpx when provided with a  yuv422p10le source
file appears to be rgb48be, which seems reasonable enough.

However upon inspection of the created dpx it appears to be only rgb24
which is not what I would have expected. Can anyone shed light on this?:-


>ffmpeg -i "prores-HD.mov" -ss 10 -t 1 -c:v dpx -y    -an "dpx-HD-%04d.dpx"
ffmpeg version N-70593-gf8f324c-by_Tim Copyright (c) 2000-2015 the
FFmpeg developers
  built with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
  configuration: --extra-version=by_Tim --progs-suffix=_Mar-10
--prefix=/mnt/msds-store-0/tim/ffmpeg-tux/usr/local
--libdir=/mnt/msds-store-0/tim/ffmpeg-tux/usr/local/lib64
--extra-cflags='-I/mnt/msds-store-0/tim/ffmpeg-tux/usr/local/include
-static'
--extra-ldflags='-L/mnt/msds-store-0/tim/ffmpeg-tux/usr/local/lib64
-static -ldl' --pkg-config-flags=--static --enable-static
--disable-shared --enable-runtime-cpudetect --enable-gpl
--enable-nonfree --enable-version3 --samples=../fate-suite/
--disable-ffserver --disable-ffplay --enable-libfaac --enable-libfdk-aac
--enable-libx264 --enable-libx265 --enable-libfreetype
  libavutil      54. 20.100 / 54. 20.100
  libavcodec     56. 26.100 / 56. 26.100
  libavformat    56. 25.101 / 56. 25.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 12.100 /  5. 12.100
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  3.100 / 53.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'prores-HD.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 537199360
    compatible_brands: qt
    creation_time   : 2015-05-05 15:09:43
  Duration: 00:02:48.29, start: 0.000000, bitrate: 182792 kb/s
    Stream #0:0(eng): Video: prores (apch / 0x68637061),
yuv422p10le(bt709), 1920x1080, 173565 kb/s, SAR 1:1 DAR 16:9, 23.98 fps,
23.98 tbr, 23976 tbn, 23976 tbc (default)
    Metadata:
      creation_time   : 2015-05-05 15:09:43
      handler_name    : Apple Alias Data Handler
      encoder         : Apple ProRes 422 (HQ)
Output #0, image2, to 'dpx-HD-%04d.dpx':
  Metadata:
    major_brand     : qt
    minor_version   : 537199360
    compatible_brands: qt
    encoder         : Lavf56.25.101
    Stream #0:0(eng): Video: dpx, rgb48be, 1920x1080 [SAR 1:1 DAR 16:9],
q=2-31, 200 kb/s, 23.98 fps, 23.98 tbn, 23.98 tbc (default)

==================================================================

>identify -verbose dpx-HD-0001.dpx
Image: dpx-HD-0001.dpx
  Format: DPX (SMPTE 268M-2003 (DPX 2.0))
  Geometry: 1920x1080
  Class: DirectClass
  Type: true color
  Depth: 8 bits-per-pixel component
  Channel Depths:
    Red:      8 bits
    Green:    8 bits
    Blue:     8 bits


-- 
Tim.
Key Fingerprint 38CF DB09 3ED0 F607 8B67 6CED 0C0B FC44 8B0B FC83