From 8d1dc0d825bcc9b8b570cbc829d67282c6892f59 Mon Sep 17 00:00:00 2001
From: chloe caruso <git@paperclover.net>
Date: Fri, 27 Jun 2025 22:35:03 -0700
Subject: [PATCH] start av1 encoding ???

---
 src/file-viewer/bin/scan3.ts | 75 +++++++++++++++++++++++++++++++++---
 1 file changed, 70 insertions(+), 5 deletions(-)

diff --git a/src/file-viewer/bin/scan3.ts b/src/file-viewer/bin/scan3.ts
index 26cf868..b8a1fcd 100644
--- a/src/file-viewer/bin/scan3.ts
+++ b/src/file-viewer/bin/scan3.ts
@@ -394,7 +394,6 @@ const imageSubsets = [
 const procImageSubsets: Process = {
   name: "encode image subsets",
   include: rules.extsImage,
-  enable: false,
   depends: ["calculate dimensions"],
   async run({ absPath, mediaFile, stat, spin }) {
     const { width, height } = UNWRAP(mediaFile.parseDimensions());
@@ -443,11 +442,75 @@ const procImageSubsets: Process = {
   },
 };
 
-const videoFormats = [
-  {
-    name: "webm",
-  },
+type VideoEncodePreset = {
+  id: string;
+  codec: "av1";
+  mbit: number;
+  crf?: number;
+  maxHeight?: number;
+  audioKbit?: number;
+} | {
+  id: string;
+  codec: "vp9";
+  mbit: number;
+  maxHeight?: number;
+  audioKbit?: number;
+};
+// const av1Pass1 = [
+// '-c:v', 'libsvtav1 -b:v 2M -pass 1 -svtav1-params "rc=1:tbr=2000000" -preset 8 -f null NUL
+// ];
+// const av1BaseArgs = [
+//   ["-c:v", "libsvtav1"],
+//   ["-preset", "3"],
+//   ["-c:a", "libopus"],
+//   ["-b:a", "192k"],
+// ].flat();
+// const webmBaseArgs = [
+//   "-c:v",
+//   "libsvtav1",
+//       ["-vf",],
+// ];
+const presets: VideoEncodePreset[] = [
+  { id: "av1-max", codec: "av1", mbit: 5 },
+  { id: "av1-hq", codec: "av1", mbit: 2, maxHeight: 900 },
+  { id: "av1-md", codec: "av1", mbit: 0.5, maxHeight: 720 },
+  { id: "av1-lq", codec: "av1", mbit: 0.2, maxHeight: 640 },
 ];
+const procVideos = presets.map((preset) => ({
+  name: "encode image subsets",
+  include: rules.extsImage,
+  async run({ absPath, mediaFile, stat, spin }) {
+    await produceAsset(`${mediaFile}/${preset.id}`, (base) => {
+      const root = path.dirname(base);
+      const pass1 = [ffmpeg!, ...ffmpegOptions, "-i", absPath];
+      if (preset.codec === "av1") {
+        pass1.push("-c:v", "libstvav1");
+        pass1.push("-b:v", preset.mbit + "M");
+        if (preset.crf) pass1.push("-crf", preset.crf.toString());
+        pass1.push(
+          "-svtav1-params",
+          ["rc=1", `tbr=${preset.mbit * 1_000_000}`].join(":"),
+        );
+      } else if (preset.codec === "vp9") {
+        pass1.push("-c:v", "libvpx-vp9");
+      } else preset satisfies never;
+
+      if (preset.maxHeight != null) {
+        pass1.push("-vf", `scale=-2:min(${preset.maxHeight}\\,ih)`);
+      }
+
+      const logfile = path.join(preset.id + ".log");
+      pass1.push("-passlogfile", logfile);
+      const pass2 = pass1.slice();
+
+      pass1.push("-f", "null");
+      pass1.push(os.devNull);
+
+      pass2.push("-c:a", "libopus");
+      pass2.push("-b:a", (preset.audioKbit ?? 192) + "k");
+    });
+  },
+} satisfies Process));
 
 const processors = [
   procDimensions,
@@ -455,6 +518,7 @@ const processors = [
   procLoadTextContents,
   procHighlightCode,
   procImageSubsets,
+  ...procVideos,
 ]
   .map((process, id, all) => {
     const strIndex = (id: number) =>
@@ -581,6 +645,7 @@ import * as path from "node:path";
 import * as child_process from "node:child_process";
 import * as util from "node:util";
 import * as crypto from "node:crypto";
+import * as os from "node:os";
 
 import { MediaFile, MediaFileKind } from "@/file-viewer/models/MediaFile.ts";
 import { AssetRef } from "@/file-viewer/models/AssetRef.ts";