Dirk Farin comments

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                                            Dirk Farin

Basic reading and writing of heif files

No, libheif does not support modifying existing files yet. They can be read or created from scratch, but not modified.

High CPU Usage During HEIF Format Conversion

Why would that be useful? It will make the encoding much slower.

High CPU Usage During HEIF Format Conversion

> are there any alternative solutions to address the issue of high CPU usage? Not much, actually. Encoding to HEIC/AVIF is simply much more computation intensive than JPEG. Only hardware...

Attempted to read or write protected memory. This is often an indication that other memory is corrupt

Does this only happen for a specific input file? If yes, please attach the file so that we can reproduce the issue.

Attempted to read or write protected memory. This is often an indication that other memory is corrupt

It seems that the error is in your code (is that C# ?). You are passing an uninitialized `imageHandle` pointer as second parameter. However, this has to point to a...

Attempted to read or write protected memory. This is often an indication that other memory is corrupt

Maybe someone else with C# experience can help.

Attempted to read or write protected memory. This is often an indication that other memory is corrupt

Or maybe have a look here: https://github.com/0xC0000054/libheif-sharp/blob/7f45f0aab812fbdc5d691adcd28a3ecc7db859c0/src/HeifContext.cs#L936

Reuse decoder buffer (instead of alloc + memcpy)

There is no need to memcpy the decoded output into an heif_image. However, if we want to avoid this, the decoder library has to support a way to decode into...

Reuse decoder buffer (instead of alloc + memcpy)

> > However, if we want to avoid this, the decoder library has to support a way to decode into externally provided memory, or it has to output the memory...

uncompressed: wip on generic compression

Looks good to me. Let me know whether I should merge this now or wait until you have added the missing parts.