1 files changed, 36 insertions, 0 deletions
diff --git a/remuxer/src/matroska_to_mpeg4.rs b/remuxer/src/matroska_to_mpeg4.rs
new file mode 100644
index 0000000..e8268e7
--- /dev/null
+++ b/remuxer/src/matroska_to_mpeg4.rs
@@ -0,0 +1,36 @@
+/*
+    This file is part of jellything (https://codeberg.org/metamuffin/jellything)
+    which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
+    Copyright (C) 2025 metamuffin <metamuffin.org>
+*/
+use anyhow::Result;
+use std::{
+    fs::{remove_file, File},
+    io::{copy, Read, Write},
+    process::{Command, Stdio},
+    random::random,
+};
+
+pub fn matroska_to_mpeg4(
+    mut input: impl Read + Send + 'static,
+    mut output: impl Write,
+) -> Result<()> {
+    let path = format!("/tmp/jellything-tc-hack-{:016x}", random::<u64>());
+    let args = format!(
+        "-hide_banner -loglevel warning -f matroska -i pipe:0 -copyts -c copy -f mp4 -movflags frag_keyframe+empty_moov {path}"
+    );
+    let mut child = Command::new("ffmpeg")
+        .args(args.split(" "))
+        .stdin(Stdio::piped())
+        .stderr(Stdio::inherit())
+        .spawn()?;
+
+    let mut stdin = child.stdin.take().unwrap();
+    copy(&mut input, &mut stdin)?;
+    drop(stdin);
+    child.wait()?.exit_ok()?;
+    copy(&mut File::open(&path)?, &mut output)?;
+    remove_file(path)?;
+
+    Ok(())
+}