From cb7e78eeddb3393a9ccb325edddc9de80d29b4b9 Mon Sep 17 00:00:00 2001
From: Sebastjan <office@primetime.consulting>
Date: Sat, 25 Apr 2026 12:06:28 +0200
Subject: [PATCH] Enable ABR 1080p<->720p; disable 480p (desynced); realistic
 bandwidth estimate

---
 views/index.ejs | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/views/index.ejs b/views/index.ejs
index 78d4d67..cdc5fe8 100644
--- a/views/index.ejs
+++ b/views/index.ejs
@@ -664,14 +664,28 @@
             manifestLoadingMaxRetry: 6,
             fragLoadingTimeOut: 20000,
             fragLoadingMaxRetry: 6,
-            startLevel: -1,
-            capLevelToPlayerSize: false,
-            abrEwmaDefaultEstimate: 50000000,
-            testBandwidth: false,
+            // ABR (Adaptive Bitrate) — let player auto-switch between qualities
+            startLevel: -1,                      // auto: start with whatever bandwidth allows
+            capLevelToPlayerSize: false,         // don't cap to viewport size
+            abrEwmaDefaultEstimate: 3000000,     // realistic 3 Mbps starting estimate
+            testBandwidth: true,                 // probe bandwidth on startup
+            abrBandWidthFactor: 0.95,            // 95% of measured BW → safety margin
+            abrBandWidthUpFactor: 0.7,           // need 70% headroom before upgrading
           });
           hls.loadSource(HLS_URL);
           hls.attachMedia(video);
           hls.on(Hls.Events.MANIFEST_PARSED, () => {
+            // Disable 480p variant (it's desynchronized from 1080p/720p on Rok's encoder)
+            // ABR will only switch between 1080p and 720p, both of which are in sync.
+            try {
+              if (hls.levels && hls.levels.length) {
+                hls.levels.forEach((lvl, idx) => {
+                  if (lvl.height && lvl.height <= 480) {
+                    lvl.enabled = false;
+                  }
+                });
+              }
+            } catch (e) {}
             hideMsg();
             video.play().catch(() => setTimeout(() => video.play().catch(() => {}), 200));
           });