feat: possible to trim start of a VOD by providing a start offset in …

…VOD response from adapter (#282) Co-authored-by: Nicholas Frederiksen <nicholas.frederiksen@eyevinn.se>
Eyevinn · Aug 8, 2023 · f560bcf · f560bcf
1 parent a735bbe
commit f560bcf
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Showing 6 changed files with 17 additions and 7 deletions.
diff --git a/README.md b/README.md
@@ -134,6 +134,7 @@ In addition there other reference implemetations that can be used:
 - `examples/multicodec.ts` : example with multicodec
 - `examples/drm.ts` : example with DRM
 - `examples/autocreate.ts` : example to auto create channel on demand
+- `examples/truncate.ts` : example when trimming start and end of a VOD
 
 ### Source linking hls-vodtolive library
 

diff --git a/engine/server.ts b/engine/server.ts
@@ -101,6 +101,7 @@ export interface VodResponse {
   offset?: number;
   diffMs?: number;
   desiredDuration?: number;
+  startOffset?: number;
   type?: string;
   currentMetadata?: VodResponseMetadata;
   timedMetadata?: VodTimedMetadata;

diff --git a/engine/session.js b/engine/session.js
@@ -1806,7 +1806,11 @@ class Session {
   _truncateVod(vodResponse) {
     return new Promise((resolve, reject) => {
       try {
-        const truncatedVod = new HLSTruncateVod(vodResponse.uri, vodResponse.desiredDuration / 1000);
+        const options = {};
+        if (vodResponse.startOffset) {
+          options.offset = vodResponse.startOffset / 1000;
+        }
+        const truncatedVod = new HLSTruncateVod(vodResponse.uri, vodResponse.desiredDuration / 1000, options);
         truncatedVod.load()
           .then(() => {
             let audioManifestLoader;

diff --git a/examples/truncate.ts b/examples/truncate.ts
@@ -57,7 +57,8 @@ class RefAssetManager implements IAssetManager {
           id: vod.id,
           title: vod.title,
           uri: vod.uri,
-          desiredDuration: 50000
+          desiredDuration: 50000,
+          startOffset: 10000,
         };
         resolve(vodResponse);
       } else {

diff --git a/package-lock.json b/package-lock.json
diff --git a/package.json b/package.json
@@ -29,7 +29,7 @@
   "license": "Apache-2.0",
   "dependencies": {
     "@eyevinn/hls-repeat": "^0.2.0",
-    "@eyevinn/hls-truncate": "^0.2.0",
+    "@eyevinn/hls-truncate": "^0.3.0",
     "@eyevinn/hls-vodtolive": "^3.1.1",
     "@eyevinn/m3u8": "^0.5.3",
     "abort-controller": "^3.0.0",