fix sidx duration

src/loader/playlist-loader.ts

@@ -12,7 +12,7 @@
 import { Events } from '../events';
 import { ErrorDetails, ErrorTypes } from '../errors';
 import { logger } from '../utils/logger';
-import { parseSegmentIndex } from '../utils/mp4-tools';
+import { parseSegmentIndex, findBox } from '../utils/mp4-tools';
 import M3U8Parser from './m3u8-parser';
 import type { LevelParsed } from '../types/level';
 import type {
@@ -543,10 +543,13 @@ class PlaylistLoader {
     response: LoaderResponse,
     context: PlaylistLoaderContext
   ): void {
-    const sidxInfo = parseSegmentIndex(
-      new Uint8Array(response.data as ArrayBuffer)
-    );
+    const data = new Uint8Array(response.data as ArrayBuffer);
+    const sidxBox = findBox(data, ['sidx'])[0];
     // if provided fragment does not contain sidx, early return
+    if (!sidxBox) {
+      return;
+    }
+    const sidxInfo = parseSegmentIndex(sidxBox);
     if (!sidxInfo) {
       return;
     }
@@ -564,7 +567,9 @@ class PlaylistLoader {
         );
       }
       if (frag.initSegment) {
-        frag.initSegment.setByteRange(String(sidxInfo.moovEndOffset) + '@0');
+        const moovBox = findBox(data, ['moov'])[0];
+        const moovEndOffset = moovBox ? moovBox.length : null;
+        frag.initSegment.setByteRange(String(moovEndOffset) + '@0');
       }
     });
   }

src/utils/mp4-tools.ts

@@ -91,22 +91,10 @@ type SidxInfo = {
   version: number;
   referencesCount: number;
   references: any[];
-  moovEndOffset: number | null;
 };
 
-export function parseSegmentIndex(initSegment: Uint8Array): SidxInfo | null {
-  const moovBox = findBox(initSegment, ['moov']);
-  const moov = moovBox[0];
-  const moovEndOffset = moov ? moov.length : null; // we need this in case we need to chop of garbage of the end of current data
-
-  const sidxBox = findBox(initSegment, ['sidx']);
-
-  if (!sidxBox || !sidxBox[0]) {
-    return null;
-  }
-
+export function parseSegmentIndex(sidx: Uint8Array): SidxInfo | null {
   const references: any[] = [];
-  const sidx = sidxBox[0];
 
   const version = sidx[0];
 
@@ -179,7 +167,6 @@ export function parseSegmentIndex(initSegment: Uint8Array): SidxInfo | null {
     version,
     referencesCount,
     references,
-    moovEndOffset,
   };
 }
 
@@ -409,13 +396,19 @@ export function getDuration(data: Uint8Array, initData: InitData) {
   }
   if (videoDuration === 0 && audioDuration === 0) {
     // If duration samples are not available in the traf use sidx subsegment_duration
-    const sidx = parseSegmentIndex(data);
-    if (sidx?.references) {
-      return sidx.references.reduce(
-        (dur, ref) => dur + ref.info.duration || 0,
-        0
-      );
+    let sidxDuration = 0;
+    const sidxs = findBox(data, ['sidx']);
+    for (let i = 0; i < sidxs.length; i++) {
+      const sidx = parseSegmentIndex(sidxs[i]);
+      if (sidx?.references) {
+        sidxDuration += sidx.references.reduce(
+          (dur, ref) => dur + ref.info.duration || 0,
+          0
+        );
+      }
     }
+
+    return sidxDuration;
   }
   if (videoDuration) {
     return videoDuration;