https://bugs.kde.org/show_bug.cgi?id=416516

--- Comment #10 from Tim <tims_t...@hotmail.com> ---
This seems to be the best ffmpeg copying for copying/importing metadata.

ffmpeg -export_xmp 1 -export_all 1 -i <input_file> -c copy -export_xmp 1
-export_all 1 -map_metadata 0 <output_file>

It will copy xmp tags and tags ffmpeg supports in the format of the output
file. Xmp tags copied seem to be written correctly as Adobe Bridge still reads
them. Supported Quicktime tags seem to copy across, but not completely. eg
OpenSuse Linux 15.1 can read the copied QuickTime <title> tag, but Windows
cannot.

There is another command that will attempt to copy mov tags unsupported by
ffmpeg, but it doesn't seem to copy them exactly. Exiftool reports differences
and in the case of the rating tags I am interested in neither Windows or Adobe
Bridge reads them from the destination file.

ffmpeg -export_xmp 1 -export_all 1 -i <input_file> -c copy -export_xmp 1
-export_all 1 -movflags use_metadata_tags <output_file>

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