[FFmpeg-trac] #5303(avcodec:open): Support float in tiff

[FFmpeg]

#5303: Support float in tiff
-------------------------------------+-----------------------------------
             Reporter:  cehoyos      |                    Owner:
                 Type:  enhancement  |                   Status:  open
             Priority:  wish         |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  tif          |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-----------------------------------

Comment (by pdr0):

 Regarding "support float in tiff" -

 "float_pattern000_ae.tiff" in the attached 7zip archive is a RGB float (no
 alpha) 620x240 pattern made of 5* 128x240 patches, -2,-1,0,1,2

 ie. RGB (-2,-2,-2) , (-1,-1,-1) , (0,0,0) , (1,1,1), (2,2,2)

 gimp imports correctly ("gimp pointer" correctly identifies -2,-1,0,1,2
 patches)

 Open source programs such as natron, vapoursynth import correctly.
 Commercial programs, such as ae, ps, nuke,... also import correctly

 {{{
 ffmpeg -i "float_pattern000_ae.tiff"
 ffmpeg version N-101185-g029e3c1c70 Copyright (c) 2000-2021 the FFmpeg
 developer
 s
   built with gcc 9.3-win32 (GCC) 20200320
   configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static
 --pkg-conf
 ig=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64 --target-
 os=mingw
 32 --enable-gpl --enable-version3 --disable-debug --disable-w32threads
 --enable-
 pthreads --enable-iconv --enable-zlib --enable-libxml2 --enable-
 libfreetype --en
 able-libfribidi --enable-gmp --enable-lzma --enable-fontconfig --enable-
 opencl -
 -enable-libvmaf --disable-vulkan --enable-libvorbis --enable-amf --enable-
 libaom
  --enable-avisynth --enable-libdav1d --enable-libdavs2 --enable-ffnvcodec
 --enab
 le-cuda-llvm --disable-libglslang --enable-libass --enable-libbluray
 --enable-li
 bmp3lame --enable-libopus --enable-libtheora --enable-libvpx --enable-
 libwebp --
 disable-lv2 --enable-libmfx --enable-libopencore-amrnb --enable-
 libopencore-amrw
 b --enable-libopenjpeg --enable-librav1e --enable-librubberband --enable-
 schanne
 l --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libsvtav1
 --enable-lib
 twolame --enable-libuavs3d --enable-libvidstab --enable-libx264 --enable-
 libx265
  --enable-libxavs2 --enable-libxvid --enable-libzimg --extra-
 cflags=-DLIBTWOLAME
 _STATIC --extra-cxxflags= --extra-ldflags=-pthread --extra-libs=-lgomp
   libavutil      56. 65.100 / 56. 65.100
   libavcodec     58.124.100 / 58.124.100
   libavformat    58. 67.100 / 58. 67.100
   libavdevice    58. 12.100 / 58. 12.100
   libavfilter     7.107.100 /  7.107.100
   libswscale      5.  8.100 /  5.  8.100
   libswresample   3.  8.100 /  3.  8.100
   libpostproc    55.  8.100 / 55.  8.100
 [tiff @ 000000f2d3966f00] This format is not supported (bpp=96, 3
 components)
 [tiff_pipe @ 000000f2d3954900] decoding for stream 0 failed
 [tiff_pipe @ 000000f2d3954900] Could not find codec parameters for stream
 0 (Vid
 eo: tiff, none): unspecified size
 Consider increasing the value for the 'analyzeduration' (0) and
 'probesize' (500
 0000) options
 Input #0, tiff_pipe, from 'float_pattern000_ae.tiff':
   Duration: N/A, bitrate: N/A
   Stream #0:0: Video: tiff, none, 25 fps, 25 tbr, 25 tbn, 25 tbc
 At least one output file must be specified
 }}}


 according to exiftool, and mediainfo - this is big endian - specifying the
 input pix_fmt does not work either

 ffmpeg -pix_fmt gbrpf32be -i "float_pattern000_ae.tiff"

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5303#comment:8>
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