libheif

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Add heif_items API to emscripten

7

I would like add the heif_items.h API so JavaScript application can leverage that functionality. I'm still trying to compile libheif to JavaScript/WASM so I can't test out the code yet,...

dukesook

Recommendations for faster AVIF encode times? (single frame, large resolution)

6

I've been toying with libheif and libavif for a couple of days and both seem to have dreadfully slow encode times for AVIF files. Of the two only libheif seems...

kevinmershon

Issues compiling (to wasm)

2

I'm running into multiple issues when trying to compile this project on a mac. When trying the compile steps as described [here](https://github.com/strukturag/libheif?tab=readme-ov-file#macos). - The cmake command it giving a lot...

Klaasvaak

[Request] Add option for docs

6

An option to turn on and off the generation of docs will be nice. I'm implementing a process of building libheif for [media-autobuild_suite](https://github.com/m-ab-s/media-autobuild_suite), I've encountered errors with doxygen, as we...

L4cache

Use upcoming aom-av1 --tune SSIMULACRA2 for avif encoding

7

The PSY fork of SVT-AV1 features a new --tune 4 which is designed to improve still picture (i.e. AVIF) encoding: "--tune 4 - A new Tune called Still Picture has...

gitoss

fill_cmpd_and_uncC() appears to support `heif_colorspace_monochrome` colourspace, but not `heif_colorspace_nonvisual`. Can this be included? In light of your recent comment: https://github.com/strukturag/libheif/issues/1426#issuecomment-2546976267 , what is the appropriate means to output a coverage...

pcdion

heif_image_add_channel(): Possible bug?

2

https://github.com/strukturag/libheif/blob/master/libheif/api/libheif/heif.cc#L1824 The `!` check does not seem to be equivalent to: ```c++ if (image->image->add_channel(channel, width, height, datatype, bit_depth, nullptr) != Error::Ok) { ``` Changing it to the latter seemed to...

jerstlouis

x265: don't apply tune by default

2

x265 tunes are intended for specific types of content or objectives (e.g. the specific characteristics of animations or better scores on metrics). They are not general purpose & should only...

0n-s

x265: don't subsample chroma by default

4

x265 has [a section of code](https://bitbucket.org/multicoreware/x265_git/src/fa2770934b8f3d88aa866c77f27cb63f69a9ed39/source/encoder/encoder.cpp#lines-3914) that automatically runs when outputting 4:4:4 that obtains the bandwidth reduction of 4:2:0 chroma subsampling but without the downsides of chroma subsampling even with...

0n-s

encode and write depth data to heic file

17

Hello, I wanna to write depth data to heic file. but I cannot find the proper API. I find that this labrary only have two APIs to encode and write...

yizhaoyanbo