diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 7f42fd2..c53ce6a 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -8,7 +8,7 @@ on:
 jobs:
   build:
     name: Build for all targets
-    runs-on: ubuntu-latest
+    runs-on: macos-latest
 
     steps:
     - uses: actions/checkout@v4
@@ -18,6 +18,10 @@ jobs:
       with:
         version: 0.13.0
 
+    - name: Install FFmpeg
+      run: |
+        brew install ffmpeg
+
     - name: Build for all targets
       run: |
         zig build -Drelease -Dci=true
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 6982111..b06a51d 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,8 +1,5 @@
 name: Zig Build and Test
 
-on:
-  pull_request:
-    branches: [ main ]
 
 jobs:
   build-and-test:
@@ -24,19 +21,21 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
+    - uses: AnimMouse/setup-ffmpeg@v1
 
     - name: Set up Zig
       uses: goto-bus-stop/setup-zig@v2
       with:
         version: 0.13.0
 
+
     - name: Build and Test
       run: |
         if [ "${{ matrix.os }}" = "windows-latest" ]; then
           zig build -Drelease -Dtarget=${{ matrix.arch }}-windows test
         elif [ "${{ matrix.os }}" = "ubuntu-latest" ]; then
           zig build -Drelease -Dtarget=${{ matrix.arch }}-linux test
-        elif [ "${{ matrix.os }}" = "macos-latest" ]; then
+        elif [[ "${{ matrix.os }}" == macos* ]]; then
           zig build -Drelease -Dtarget=${{ matrix.arch }}-macos test
         fi
       shell: bash
diff --git a/.gitignore b/.gitignore
index b18e4a0..6d97fb2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,9 +18,7 @@ zig-out/
 /docgen_tmp/
 images/
 **/*.DS_Store
-**/*.png
-**/*.jpg
-**/*.jpeg
+test_output/
 
 # Although this was renamed to .zig-cache, let's leave it here for a few
 # releases to make it less annoying to work with multiple branches.
diff --git a/build.zig b/build.zig
index 841c600..f569886 100644
--- a/build.zig
+++ b/build.zig
@@ -18,24 +18,53 @@ pub fn build(b: *std.Build) !void {
         }
     } else {
         const target = b.standardTargetOptionsQueryOnly(.{});
-        try runZig(b, dep_stb, target, optimize);
+        try runZig(b, target, optimize, dep_stb);
     }
 }
 
-fn buildCi(
+fn setupExecutable(
     b: *std.Build,
+    name: []const u8,
     target: std.Target.Query,
     optimize: std.builtin.OptimizeMode,
     dep_stb: *std.Build.Dependency,
-) !void {
+    link_libc: bool,
+) !*std.Build.Step.Compile {
     const exe = b.addExecutable(.{
-        .name = "asciigen",
+        .name = name,
         .root_source_file = b.path("src/main.zig"),
         .target = b.resolveTargetQuery(target),
         .optimize = optimize,
-        .link_libc = true,
+        .link_libc = link_libc,
     });
 
+    const clap = b.dependency("clap", .{});
+    exe.root_module.addImport("clap", clap.module("clap"));
+
+    linkFfmpeg(exe);
+
+    exe.addCSourceFile(.{ .file = b.path("stb/stb.c") });
+    exe.addIncludePath(dep_stb.path(""));
+
+    return exe;
+}
+
+fn linkFfmpeg(exe: *std.Build.Step.Compile) void {
+    exe.linkSystemLibrary2("libavformat", .{ .use_pkg_config = .force });
+    exe.linkSystemLibrary2("libavcodec", .{ .use_pkg_config = .force });
+    exe.linkSystemLibrary2("libavutil", .{ .use_pkg_config = .force });
+    exe.linkSystemLibrary2("libswscale", .{ .use_pkg_config = .force });
+    exe.linkSystemLibrary2("libswresample", .{ .use_pkg_config = .force });
+}
+
+fn buildCi(
+    b: *std.Build,
+    target: std.Target.Query,
+    optimize: std.builtin.OptimizeMode,
+    dep_stb: *std.Build.Dependency,
+) !void {
+    const exe = try setupExecutable(b, "asciigen", target, optimize, dep_stb, true);
+
     const target_output = b.addInstallArtifact(exe, .{
         .dest_dir = .{
             .override = .{
@@ -45,43 +74,31 @@ fn buildCi(
     });
 
     b.getInstallStep().dependOn(&target_output.step);
-
-    const clap = b.dependency("clap", .{});
-    exe.root_module.addImport("clap", clap.module("clap"));
-
-    exe.addCSourceFile(.{ .file = b.path("stb/stb.c") });
-    exe.addIncludePath(dep_stb.path(""));
 }
 
 fn runZig(
     b: *std.Build,
-    dep_stb: *std.Build.Dependency,
     target: std.Target.Query,
     optimize: std.builtin.OptimizeMode,
+    dep_stb: *std.Build.Dependency,
 ) !void {
-    const exe = b.addExecutable(.{
-        .name = "asciigen",
-        .root_source_file = b.path("src/main.zig"),
-        .target = b.resolveTargetQuery(target),
-        .optimize = optimize,
-        .link_libc = true,
-    });
-
-    const clap = b.dependency("clap", .{});
-    exe.root_module.addImport("clap", clap.module("clap"));
+    const exe = try setupExecutable(
+        b,
+        "asciigen",
+        target,
+        optimize,
+        dep_stb,
+        true,
+    );
 
-    exe.addCSourceFile(.{ .file = b.path("stb/stb.c") });
-    exe.addIncludePath(dep_stb.path(""));
-
-    const exe_check = b.addExecutable(.{
-        .name = "asciigen-check",
-        .root_source_file = b.path("src/main.zig"),
-        .target = b.resolveTargetQuery(target),
-        .optimize = optimize,
-    });
-    exe_check.root_module.addImport("clap", clap.module("clap"));
-    exe_check.addCSourceFile(.{ .file = b.path("stb/stb.c") });
-    exe_check.addIncludePath(dep_stb.path(""));
+    const exe_check = try setupExecutable(
+        b,
+        "asciigen-check",
+        target,
+        optimize,
+        dep_stb,
+        false,
+    );
     const check_step = b.step("check", "Run the check");
     check_step.dependOn(&exe_check.step);
 
@@ -102,6 +119,7 @@ fn runZig(
         .optimize = optimize,
         .link_libc = true,
     });
+    linkFfmpeg(unit_tests);
     unit_tests.addCSourceFile(.{ .file = b.path("stb/stb.c") });
     unit_tests.addIncludePath(dep_stb.path(""));
     const run_unit_tests = b.addRunArtifact(unit_tests);
diff --git a/src/main.zig b/src/main.zig
index 9df229e..274a91c 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -6,6 +6,16 @@ const stb = @cImport({
     @cInclude("stb_image_write.h");
     @cInclude("stb_image_resize2.h");
 });
+const av = @cImport({
+    @cInclude("libavformat/avformat.h");
+    @cInclude("libavcodec/avcodec.h");
+    @cInclude("libavutil/avutil.h");
+    @cInclude("libavutil/imgutils.h");
+    @cInclude("libswscale/swscale.h");
+    @cInclude("libswresample/swresample.h");
+    @cInclude("libavutil/channel_layout.h");
+    @cInclude("libavutil/samplefmt.h");
+});
 
 // VARS
 const ASCII_CHARS = " .:-=+*%#@"; // low to high brightness
@@ -514,6 +524,7 @@ fn convertToAscii(
 }
 
 pub fn main() !void {
+    _ = av;
     var gpa = std.heap.GeneralPurposeAllocator(.{}){};
     defer _ = gpa.deinit();
     const allocator = gpa.allocator();
@@ -738,6 +749,7 @@ fn saveOutputImage(ascii_img: []u8, img: Image, args: Args) !void {
 }
 
 test "test_ascii_generation" {
+    _ = av;
     const allocator = std.testing.allocator;
 
     // Create a temporary file path
@@ -751,11 +763,11 @@ test "test_ascii_generation" {
 
     // Set up test arguments
     const test_args = Args{
-        .input = "https://w.wallhaven.cc/full/p9/wallhaven-p9gr2p.jpg",
+        .input = "test_img.png",
         .output = tmp_path,
         .color = false,
         .invert_color = false,
-        .scale = 8.0,
+        .scale = 1.0,
         .detect_edges = false,
         .sigma1 = 0.5,
         .sigma2 = 1.0,
@@ -770,9 +782,9 @@ test "test_ascii_generation" {
     defer file.close();
 
     // Delete the temporary file
-    try std.fs.deleteFileAbsolute(tmp_path);
+    // try std.fs.deleteFileAbsolute(tmp_path);
 
     // Try to open the file again, which should fail
-    const result = std.fs.openFileAbsolute(tmp_path, .{});
-    try std.testing.expectError(error.FileNotFound, result);
+    // const result = std.fs.openFileAbsolute(tmp_path, .{});
+    // try std.testing.expectError(error.FileNotFound, result);
 }
diff --git a/test_img.png b/test_img.png
new file mode 100644
index 0000000..d370e6f
Binary files /dev/null and b/test_img.png differ