From d281939a47bccfd03bc3a45f38a73bb2b4ff7e5f Mon Sep 17 00:00:00 2001
From: clover caruso <git@paperclover.net>
Date: Fri, 8 May 2026 20:58:01 -0700
Subject: [PATCH] fix: ffmpeg progress tracker didn't consider fractional
 framerates

honestly such a stupid thing like yeah i want to have 29.97 fps like no
go be a normal human being.

fixes #35
---
 lib/subprocess/ffmpeg.test.ts | 20 ++++++++++++++++++++
 lib/subprocess/ffmpeg.ts      |  2 +-
 2 files changed, 21 insertions(+), 1 deletion(-)
 create mode 100644 lib/subprocess/ffmpeg.test.ts

diff --git a/lib/subprocess/ffmpeg.test.ts b/lib/subprocess/ffmpeg.test.ts
new file mode 100644
index 0000000000000000000000000000000000000000..9e58ac2263ca4631ca88585789e3f330ea54f83d
--- /dev/null
+++ b/lib/subprocess/ffmpeg.test.ts
@@ -0,0 +1,20 @@
+test("Parse uses fractional input fps for total frame estimates", () => {
+  const parser = new Parse();
+
+  parser.onLine("Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':");
+  parser.onLine("  Duration: 00:01:08.10, start: 0.000000, bitrate: 352 kb/s");
+  parser.onLine(
+    "  Stream #0:0[0x1](und): Video: h264, yuv420p(progressive), 160x90, 351 kb/s, 29.97 fps, 29.97 tbr, 30k tbn (default)",
+  );
+
+  const result = parser.onLine(
+    "frame= 2041 fps=0.0 q=-1.0 Lsize=N/A time=00:01:08.10 bitrate=N/A speed= 900x",
+  );
+
+  assert.equal(result.kind, "progress");
+  assert.equal(result.totalFrames, 2041);
+});
+
+import assert from "node:assert";
+import { test } from "vitest";
+import { Parse } from "./ffmpeg.ts";
diff --git a/lib/subprocess/ffmpeg.ts b/lib/subprocess/ffmpeg.ts
index d9e526ad1e5ba3ff63aa31cbde1a09fd7077a479..2b29e1f12a2f39e1ff65443b71d2cedc451463c5 100644
--- a/lib/subprocess/ffmpeg.ts
+++ b/lib/subprocess/ffmpeg.ts
@@ -161,7 +161,7 @@ export class Parse {
               );
             }
             if (!this.targetFps) {
-              const match = line.match(/^Stream.*, (\d+) fps/);
+              const match = line.match(/^Stream.*, (\d+(?:\.\d+)?) fps/);
               if (match) this.targetFps = Number(match[1]);
             }
           }
-- 
2.54.0