Using the command `heif-convert` with the quality option `-q [0...100]` only has an effect when the output type is jpg.
The option has no effect for `.png` and `.y4m`.

It would be cool if that could be reflected in the man pages.
Add info to Man page; Quality; png
This is a GitHub Issue
repo:libheif
owner:strukturag
Title : Add info to Man page; Quality; png
Issue date:

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Using the command `heif-convert` with the quality option `-q [0...100]` only has an effect when the output type is jpg.
The option has no effect for `.png` and `.y4m`.

It would be cool if that could be reflected in the man pages.
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