diff options
| -rw-r--r-- | scrypted/scrypted-viewport.ts | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/scrypted/scrypted-viewport.ts b/scrypted/scrypted-viewport.ts index 6245192..21031fc 100644 --- a/scrypted/scrypted-viewport.ts +++ b/scrypted/scrypted-viewport.ts @@ -6,7 +6,7 @@ // short git hash of the commit that added this constant — if the // hash in the log doesn't match the HEAD this file came from, the // Scrypted Script editor is still on stale code. -const SCRIPT_VERSION = "e4a6d07"; +const SCRIPT_VERSION = "pending"; // // Architecture // ------------ @@ -1034,14 +1034,27 @@ class ScryptedViewportProvider extends ScryptedDeviceBase // Path 1: sharp. require()-fail caught at the boundary so a // missing native module just falls through. + // + // Quality math: ffmpeg's mjpeg -q:v 1 corresponds to sharp JPEG + // quality ~99-100 (their scales aren't 1:1 but the practical + // result matches). Our previous formula maxed out at 97 — that + // was the visible delta vs the stream. New formula: at + // jpegQuality=1 emit 100; at 10 emit ~82; at 31 emit ~40. + // Also force chromaSubsampling 4:4:4 at the top end so colored + // edges (text, UI overlays) don't smear — sharp's default 4:2:0 + // is half-rate chroma and is the dominant visible artifact at + // panel-native resolution. mozjpeg encoder for tighter files at + // the same visual quality. if (!transformed.length) { try { const sharp = require("sharp"); let img = sharp(srcJpeg, { failOnError: false }); if (needsRotate) img = img.rotate(90); + const sharpQuality = Math.min(100, 102 - v.jpegQuality * 2); + const chroma = v.jpegQuality <= 2 ? "4:4:4" : "4:2:0"; transformed = await img .resize(panelW, panelH, { fit: "fill", kernel: "lanczos3" }) - .jpeg({ quality: Math.max(50, 100 - v.jpegQuality * 3) }) + .jpeg({ quality: sharpQuality, chromaSubsampling: chroma, mozjpeg: true }) .toBuffer(); path = "sharp"; } catch { /* fall through */ } |