From f13a9c5128d9421055c88be0d817a7c3e7037836 Mon Sep 17 00:00:00 2001
From: Serial <69764315+Serial-ATA@users.noreply.github.com>
Date: Tue, 15 Oct 2024 09:15:37 -0400
Subject: [PATCH] EBML: Retain companion tag

---
 lofty/src/ebml/tag/mod.rs | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/lofty/src/ebml/tag/mod.rs b/lofty/src/ebml/tag/mod.rs
index bffc4783..3ccc499c 100644
--- a/lofty/src/ebml/tag/mod.rs
+++ b/lofty/src/ebml/tag/mod.rs
@@ -13,10 +13,11 @@ pub use tag::*;
 pub use tag_name::*;
 pub use target::*;
 
-use crate::config::WriteOptions;
+use crate::config::{global_options, WriteOptions};
 use crate::error::LoftyError;
 use crate::io::{FileLike, Length, Truncate};
 use crate::picture::Picture;
+use crate::tag::companion_tag::CompanionTag;
 use crate::tag::{Accessor, MergeTag, SplitTag, TagExt, TagType};
 
 use std::borrow::Cow;
@@ -373,7 +374,13 @@ impl MergeTag for SplitTagRemainder {
 
 impl From<MatroskaTag> for crate::tag::Tag {
 	fn from(input: MatroskaTag) -> Self {
-		input.split_tag().1
+		let (remainder, mut tag) = input.split_tag();
+
+		if unsafe { global_options().preserve_format_specific_items } && remainder.0.len() > 0 {
+			tag.companion_tag = Some(CompanionTag::Matroska(remainder.0));
+		}
+
+		tag
 	}
 }