diff --git a/default.nix b/default.nix
index da92337..db7fdf0 100644
--- a/default.nix
+++ b/default.nix
@@ -8,6 +8,7 @@ in
     addgrain = prev.callPackage ./plugins/addgrain { };
     autocrop = prev.callPackage ./plugins/autocrop { };
     awarpsharp2 = prev.callPackage ./plugins/awarpsharp2 { };
+    bestaudiosource = prev.callPackage ./plugins/bestaudiosource { };
     beziercurve = prev.callPackage ./plugins/beziercurve { };
     bifrost = prev.callPackage ./plugins/bifrost { };
     bilateral = prev.callPackage ./plugins/bilateral { };
diff --git a/plugins/bestaudiosource/0001-Fix-audio-source-iteration-with-Wsign-compare.patch b/plugins/bestaudiosource/0001-Fix-audio-source-iteration-with-Wsign-compare.patch
new file mode 100644
index 0000000..f393135
--- /dev/null
+++ b/plugins/bestaudiosource/0001-Fix-audio-source-iteration-with-Wsign-compare.patch
@@ -0,0 +1,58 @@
+From 060ebbed04ba4ce351c4f9f641308e1b84ee30f5 Mon Sep 17 00:00:00 2001
+From: Simon Bruder <simon@sbruder.de>
+Date: Mon, 25 Apr 2022 11:33:22 +0200
+Subject: [PATCH] Fix audio source iteration with -Wsign-compare
+
+---
+ src/audiosource.cpp | 10 +++++-----
+ 1 file changed, 5 insertions(+), 5 deletions(-)
+
+diff --git a/src/audiosource.cpp b/src/audiosource.cpp
+index 9d34f47..88d9820 100644
+--- a/src/audiosource.cpp
++++ b/src/audiosource.cpp
+@@ -292,7 +292,7 @@ bool BestAudioSource::GetExactDuration() {
+     if (HasExactNumAudioSamples)
+         return true;
+     int Index = -1;
+-    for (int i = 0; i < MaxAudioSources; i++) {
++    for (size_t i = 0; i < MaxAudioSources; i++) {
+         if (Decoders[i] && (Index < 0 || Decoders[Index]->GetFrameNumber() < Decoders[i]->GetFrameNumber()))
+             Index = i;
+     }
+@@ -386,14 +386,14 @@ void BestAudioSource::GetAudio(uint8_t * const * const Data, int64_t Start, int6
+         return;
+ 
+     int Index = -1;
+-    for (int i = 0; i < MaxAudioSources; i++) {
++    for (size_t i = 0; i < MaxAudioSources; i++) {
+         if (Decoders[i] && Decoders[i]->GetSamplePosition() <= Start && (Index < 0 || Decoders[Index]->GetSamplePosition() < Decoders[i]->GetSamplePosition()))
+             Index = i;
+     }
+ 
+     // If an empty slot exists simply spawn a new decoder there
+     if (Index < 0) {
+-        for (int i = 0; i < MaxAudioSources; i++) {
++        for (size_t i = 0; i < MaxAudioSources; i++) {
+             if (!Decoders[i]) {
+                 Index = i;
+                 Decoders[i] = new LWAudioDecoder(Source.c_str(), Track, FFOptions);
+@@ -405,7 +405,7 @@ void BestAudioSource::GetAudio(uint8_t * const * const Data, int64_t Start, int6
+     // No far enough back decoder exists and all slots are occupied so evict a random one
+     if (Index < 0) {
+         Index = 0;
+-        for (int i = 0; i < MaxAudioSources; i++) {
++        for (size_t i = 0; i < MaxAudioSources; i++) {
+             if (Decoders[i] && DecoderLastUse[i] < DecoderLastUse[Index])
+                 Index = i;
+         }
+@@ -458,4 +458,4 @@ void BestAudioSource::GetAudio(uint8_t * const * const Data, int64_t Start, int6
+ 
+     if (Count != 0)
+         throw AudioException("Code error, failed to provide all samples");
+-}
+\ No newline at end of file
++}
+-- 
+2.33.1
+
diff --git a/plugins/bestaudiosource/default.nix b/plugins/bestaudiosource/default.nix
new file mode 100644
index 0000000..4d5d265
--- /dev/null
+++ b/plugins/bestaudiosource/default.nix
@@ -0,0 +1,33 @@
+{ lib, stdenv, fetchFromGitHub, meson, ninja, pkg-config, ffmpeg, vapoursynth }:
+
+stdenv.mkDerivation rec {
+  pname = "bestaudiosource";
+  version = "unstable-2021-09-28";
+
+  src = fetchFromGitHub {
+    owner = "vapoursynth";
+    repo = pname;
+    rev = "87d6cba4a119f347e146de8f9751646b6f21284c";
+    sha256 = "sha256-ylNPv/QOBcJk6QTuXL/W6kJGJ+7Yg7WEFS5HEp7AIYY=";
+  };
+
+  patches = [
+    ./0001-Fix-audio-source-iteration-with-Wsign-compare.patch
+  ];
+
+  nativeBuildInputs = [ meson ninja pkg-config ];
+  buildInputs = [ ffmpeg vapoursynth ];
+
+  postPatch = ''
+    substituteInPlace meson.build \
+        --replace "vapoursynth_dep.get_pkgconfig_variable('libdir')" "get_option('libdir')"
+  '';
+
+  meta = with lib; {
+    description = "Audio source and FFmpeg wrapper plugin for VapourSynth";
+    homepage = "https://github.com/vapoursynth/bestaudiosource";
+    license = licenses.mit;
+    maintainers = with maintainers; [ sbruder ];
+    platforms = platforms.all;
+  };
+}