v1.4.0

[wantehchang]

1.4.0 - 2026-03-04

Added since 1.3.0

• Allow avifenc to read png or jpeg files through stdin using --stdin-format.
• Support some Sample Transform schemes as defined in the version 1.2 of the
  AVIF specification.
• Add an optional argument to the --depth flag of avifenc used to enable a bit
  depth extension scheme in the encoded file.
• Add support for converting jpeg files with Apple style gain maps.
• Add support for PNG cICP chunk when decoding PNG files. If a PNG file contains
  a cICP chunk and other color information chunks, such as iCCP (ICC profile),
  the other chunks are ignored as per the PNG Specification Third Edition
  Section 4.3.
• Support reading Sample-Transform-based 16-bit AVIF files when
  avifDecoder::imageContentToDecode & AVIF_IMAGE_CONTENT_SAMPLE_TRANSFORMS is
  not zero.
• Support Sample Transform derived image items with grid input image items.
• Add --sato flag to avifdec to enable Sample Transforms support at decoding.
• Add --grid option to avifgainmaputil.
• Apply clean aperture crop, rotation and mirror when decoding to PNG or JPEG.
  Remove orientation information from Exif if present.
• Add avif::RGBImageCleanup to the C++ API.

Changed since 1.3.0

• Set avifDecoder::image->depth to the same value after avifDecoderParse() as
  after avifDecoderNextImage() when the file to decode contains a 'sato' derived
  image item.
• avifdec only enables Sample Transform decoding when --depth is set to 16.
• Update dav1d.cmd/dav1d_android.sh/LocalDav1d.cmake: 1.5.3
• Update googletest.cmd/LocalGTest.cmake: v1.17.0
• Update libgav1.cmd: v0.20.0
• Update libjpeg.cmd/LocalJpeg.cmake: 3.1.3
• Update libyuv.cmd/LocalLibyuv.cmake: deeb764bb (1922)
• Update libsharpyuv.cmd/LocalLibsharpyuv.cmake: v1.6.0
• Update libxml2.cmd/LocalLibXml2.cmake: v2.15.1
• Update aom.cmd/LocalAom.cmake: v3.13.1
• Update LocalAvm.cmake: research-v13.0.0
• Update rav1e.cmd/LocalRav1e.cmake: cargo-c v0.10.20, corrosion v0.6.1,
  rav1e v0.8.1
• Update svt.cmd/svt.sh/LocalSvt.cmake: v4.0.1
• Update zlibpng.cmd/LocalZlibpng.cmake: libpng 1.6.55, zlib 1.3.2
• Fix grayscale conversion when changing the bit depth.
• Bump cmake_minimum_required from 3.13 to 3.22
• Associate transformative properties with alpha auxiliary image items.
• Always forward the CICP color primaries, transfer characteristics,
  and matrix coefficients to the AV1 encoder, which writes them in the Sequence
  Header OBU, for compatibility with libraries that wrongly ignore the colr box.
• Use a "quality to quantizer (QP)" mapping formula designed for AOM_TUNE_IQ.
• Set tuning before applying the user-provided specific aom codec options.
• Use AOM_TUNE_PSNR by default when encoding alpha with libaom because
  AOM_TUNE_SSIM causes ringing for alpha.
• Use AOM_TUNE_IQ by default when encoding still non-RGB color samples with
  libaom v3.13.0 or later.
• Converting an image containing a gain map using avifenc with the --grid flag
  now also splits the gain map into a grid.
• In avifenc, set Exif orientation to 1 (no transformation) when converting
  JPEGs to AVIF.
• Use all-intra encoding for a layered image if the total number of layers is 2
  and the quality of the first layer is very low (q <= 10).

Removed since 1.3.0

• Remove ext/avm.cmd.
• Remove the AVIF_ENABLE_EXPERIMENTAL_SAMPLE_TRANSFORM CMake flag.
• Remove support for libaom versions up to 2.0.0 inclusive.
• Un-export the private function avifImagePushProperty().

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This discussion was created from the release v1.4.0.