metaflac: add page (#22138)

Co-authored-by: Ivan Baluta <ivanbaluta.dev@gmail.com>
Co-authored-by: Lena Pastwa <lena@lnps.me>

pages/common/metaflac.md

@@ -0,0 +1,37 @@
+# metaflac
+
+> View and edit metadata in FLAC audio files.
+> See also: `flac`.
+> More information: <https://xiph.org/flac/documentation_tools_metaflac.html>.
+
+- Show all tags in a FLAC file:
+
+`metaflac --show-all-tags {{path/to/file.flac}}`
+
+- Show one or more specific tags from a FLAC file:
+
+`metaflac --show-tag {{tag_name1}} --show-tag {{tag_name2}} {{path/to/file.flac}}`
+
+- Set a tag in a FLAC file:
+
+`metaflac --set-tag "{{tag_name}}={{tag_value}}" {{path/to/file.flac}}`
+
+- Remove all tags with a specific name from a FLAC file:
+
+`metaflac --remove-tag {{tag_name}} {{path/to/file.flac}}`
+
+- Remove all tags from a FLAC file:
+
+`metaflac --remove-all-tags {{path/to/file.flac}}`
+
+- Import tags from a file (one `NAME=VALUE` pair per line):
+
+`metaflac --import-tags-from {{path/to/tags.txt}} {{path/to/file.flac}}`
+
+- List all metadata blocks in a FLAC file:
+
+`metaflac --list {{path/to/file.flac}}`
+
+- Show the sample rate and number of channels from a FLAC file:
+
+`metaflac --show-sample-rate --show-channels {{path/to/file.flac}}`