When you want control over the codecs used and their settings, or have a large batch of movies to convert, use a transcoder like Compressor.
How to use the Finder to locate movies which need to be converted for future compatibility, and converting them with QuickTime Player/
When converting legacy formats relying on QuickTime 7 for decoding, don’t forget movies and images embedded in presentations.
Later this year, in macOS 10.15, one of the media types which will become unsupported is JPEG 2000 still images. Here’s how to find and convert your old images.
Notarized versions of DeepTools for working with versions, Rosettavert for converting text encodings, SearchKey and SearchKeyLite for editing extended attributes for Spotlight searches.
How to convert the text content of text, HTML, RTF, Word .doc and .docx, Webarchive, and other files, for free, using a simple command tool.
Alex Karahalios’ shell script and Automator workflow to convert JPEG to HEIF/HEIC files.
Tools for examining Unicode normalisation, converting between text encodings, and for obfuscating text using similar Unicode characters.
Factoring the code better to separate reading and writing the underlying data, and converting that for display.
Do you want to convert files using non-Unicode text to modern format? Or between the 144 different encodings supported by iconv? Here’s a tool to make that easy.