libheif

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Chroma subsampling does not lowpass filter (take average) before discarding samples

10

The RGB-to-YCbCr conversion code in libheif/heif_colorconversion.cc performs chroma subsampling by discarding samples only, without first lowpass filtering (taking a weighted average of) the samples. A representative example is the second...

wantehchang

Query: libheif installation through vcpkg on MACOS-Arm64

1

Do you know why it is not possible to install libheif through vcpkg on MACOS-Arm64 ?. Seems the vcpkg having problem installing the x265 library for Latest MacOS having M1...

AydinyanNarek

heifhead as a pendant to jhead

1

One more wish: a program heifhead which works similar to jhead. I use jhead to code date in time in the filename like jhead -ft -n%Y%m%d_%H%M%S and want to do...

hfst1

Cannot load PNG because libpng support was not compiled.

3

Apple M1 Pro. Follow the installation instructions, and try to run examples `./heif-enc` to convert png to heif and get error `Cannot load PNG because libpng support was not compiled.`...

gitlabspy

Unregister default plugins on deinitialization

2

Unregister default plugins to prevent memory leaks in plugin's objects, for example, ctxIdxLookup in libde265

stepkamipt

API to manually deinitialize encoders and decoders plugins and prevent memory leaks

stepkamipt

Fix ASAN alloc-dealloc-mismatch for ColorProfile_nclx

1

Fixes #652

amyspark

VVC/H.266 support

40

Hi, Do you think it is in the scope of libheif the support for VVC/H.266 still image format? There is already a pretty decent free software implementation of VVC here:...

rafael2k

Slow opening of the photo

5

My iPhone photo opens for about 2s. Other much heavier files open immediately. Will the speed be optimised in the future or is it no longer better?

guglovich

Heif decoding processing speed is degraded in V1.7.0 or later version.

7

I'm currently using the v1.6.2 version, but upgrading to v1.10.0 slowed down the heif decoding process by about 2.8 times. I think the cause is that the internal processing was...

takafumimastushita