#11210: tiff files with a premult alpha channel are no longer read by ffmpeg
-------------------------------------+-------------------------------------
Reporter: jsteinkamp | Type: defect
Status: new | Priority: important
Component: ffmpeg | Version:
Keywords: tiff with | unspecified
alpha | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Premult tiff files with a separate alpha channel no longer read.
Unpremult tiff files with alpha information in the same layer as RGB,
similar to PNG work.
Older versions of ffmpeg are able to read both variations.
example tiff files: https://jsteinkamp.com/tiff_ffmpeg_bug_report.zip
SCRIPT
ffmpeg -y -i premult.tif -vcodec png -pix_fmt rgb32 premult.png
ERROR [tiff @ 000002812cfdbb80] rps 0 invalid [vist#0:0/tiff @
000002812d00ad80] [dec:tiff @ 000002812d00f900] Decoding error: Invalid
data found when processing input
FFMPEG VERSION
ffmpeg version N-117174-g8b4e32f30b-20240925 Copyright (c) 2000-2024 the
FFmpeg developers
built with gcc 14.2.0 (crosstool-NG 1.26.0.106_ed12fa6)
configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static
--pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64
--target-os=mingw32 --enable-gpl --enable-version3 --disable-debug
--disable-w32threads --enable-pthreads --enable-iconv --enable-zlib
--enable-libfreetype --enable-libfribidi --enable-gmp --enable-libxml2
--enable-lzma --enable-fontconfig --enable-libharfbuzz --enable-libvorbis
--enable-opencl --disable-libpulse --enable-libvmaf --disable-libxcb
--disable-xlib --enable-amf --enable-libaom --enable-libaribb24 --enable-
avisynth --enable-chromaprint --enable-libdav1d --enable-libdavs2
--enable-libdvdread --enable-libdvdnav --disable-libfdk-aac --enable-
ffnvcodec --enable-cuda-llvm --enable-frei0r --enable-libgme --enable-
libkvazaar --enable-libaribcaption --enable-libass --enable-libbluray
--enable-libjxl --enable-libmp3lame --enable-libopus --enable-librist
--enable-libssh --enable-libtheora --enable-libvpx --enable-libwebp
--enable-libzmq --enable-lv2 --enable-libvpl --enable-openal --enable-
libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264
--enable-libopenjpeg --enable-libopenmpt --enable-librav1e --enable-
librubberband --enable-schannel --enable-sdl2 --enable-libsoxr --enable-
libsrt --enable-libsvtav1 --enable-libtwolame --enable-libuavs3d
--disable-libdrm --enable-vaapi --enable-libvidstab --enable-vulkan
--enable-libshaderc --enable-libplacebo --enable-libvvenc --enable-libx264
--enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libzimg
--enable-libzvbi --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags=
--extra-libs=-lgomp --extra-ldflags=-pthread --extra-ldexeflags=
--cc=x86_64-w64-mingw32-gcc --cxx=x86_64-w64-mingw32-g++
--ar=x86_64-w64-mingw32-gcc-ar --ranlib=x86_64-w64-mingw32-gcc-ranlib
--nm=x86_64-w64-mingw32-gcc-nm --extra-version=20240925
libavutil 59. 40.100 / 59. 40.100
libavcodec 61. 20.100 / 61. 20.100
libavformat 61. 8.100 / 61. 8.100
libavdevice 61. 4.100 / 61. 4.100
libavfilter 10. 5.100 / 10. 5.100
libswscale 8. 4.100 / 8. 4.100
libswresample 5. 4.100 / 5. 4.100
libpostproc 58. 4.100 / 58. 4.100
--
Ticket URL: <https://trac.ffmpeg.org/ticket/11210>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
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