[FFmpeg-user] xyz12le Jpeg2000 MXF files in DCP now detected as rgb48le

[Kieran O'Leary]

Hi,

I remember that older versions of ffmpeg would detect a pix_fmt of xyz12le when a jpeg2000/MXF file from a DCP was passed as input. Now I see a value of: rgb48le(12 bpc, progressive)

Was this intentional, and if so, why did the behaviour change? I tried looking at the commit history for jpeg2000dec.c but couldn't find the answer..

You can find some sample DCPs here: https://www.charbon-studio.com/resources



$ ffmpeg -i video1.mxf

ffmpeg version 4.0.2 Copyright (c) 2000-2018 the FFmpeg developers

  built with Apple LLVM version 8.0.0 (clang-800.0.42.1)

  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.0.2 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-ffplay --enable-libass --enable-libfreetype --enable-libmp3lame --enable-libtesseract --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags=-I/usr/local/Cellar/openjpeg/2.3.0/include/openjpeg-2.3

  libavutil      56. 14.100 / 56. 14.100

  libavcodec     58. 18.100 / 58. 18.100

  libavformat    58. 12.100 / 58. 12.100

  libavdevice    58.  3.100 / 58.  3.100

  libavfilter     7. 16.100 /  7. 16.100

  libavresample   4.  0.  0 /  4.  0.  0

  libswscale      5.  1.100 /  5.  1.100

  libswresample   3.  1.100 /  3.  1.100

  libpostproc    55.  1.100 / 55.  1.100

[mxf @ 0x7fee8c00c800] "OPAtom" with 2 ECs - assuming OP1a

Input #0, mxf, from 'video1.mxf':

  Metadata:

    uid             : 0cabf88b-e592-4bd2-814a-8bc05c8f619d

    generation_uid  : ea6c96ea-bab7-40bf-be6d-2fb9e2154edd

    company_name    : OpenDCP

    product_name    : OpenDCP

    product_version : 0.27.1

    product_uid     : 43059a1d-0432-4101-b83f-736815acf31d

    modification_date: 2013-03-07T10:12:52.000000Z

    application_platform: osx

    material_package_umid: 0x060A2B340101010501010F20130000002602B03533D14F53A6A5569ABC47D86B

    material_package_name: AS-DCP Material Package

    timecode        : 00:00:00:00

  Duration: 00:00:12.50, start: 0.000000, bitrate: 95987 kb/s

    Stream #0:0: Video: jpeg2000, rgb48le(12 bpc, progressive), 2048x858, SAR 1:1 DAR 1024:429, 24 tbr, 24 tbn, 24 tbc

    Metadata:

      file_package_umid: 0x060A2B340101010501010F2013000000E8211854E0EE480A84333AB990F30D15

      file_package_name: File Package: SMPTE 429-4 frame wrapping of JPEG 2000 codestreams

      track_name      : Picture Track

At least one output file must be specified


Best,


Kieran.