diff --git a/src/demux/transmuxer.ts b/src/demux/transmuxer.ts
index 5b37e99942f..89a48e0f18e 100644
--- a/src/demux/transmuxer.ts
+++ b/src/demux/transmuxer.ts
@@ -347,7 +347,12 @@ export default class Transmuxer {
     chunkMeta: ChunkMetadata
   ): TransmuxerResult {
     const { audioTrack, avcTrack, id3Track, textTrack } = (this
-      .demuxer as Demuxer).demux(data, timeOffset, false);
+      .demuxer as Demuxer).demux(
+      data,
+      timeOffset,
+      false,
+      !this.config.progressive
+    );
     const remuxResult = this.remuxer!.remux(
       audioTrack,
       avcTrack,
diff --git a/src/demux/tsdemuxer.ts b/src/demux/tsdemuxer.ts
index a382143a2fc..fe7e071ebe6 100644
--- a/src/demux/tsdemuxer.ts
+++ b/src/demux/tsdemuxer.ts
@@ -486,7 +486,12 @@ class TSDemuxer implements Demuxer {
     keyData: KeyData,
     timeOffset: number
   ): Promise<DemuxerResult> {
-    const demuxResult = this.demux(data, timeOffset, true);
+    const demuxResult = this.demux(
+      data,
+      timeOffset,
+      true,
+      !this.config.progressive
+    );
     const sampleAes = (this.sampleAes = new SampleAesDecrypter(
       this.observer,
       this.config,
diff --git a/src/types/demuxer.ts b/src/types/demuxer.ts
index f398b3e06d0..505d2fe42f7 100644
--- a/src/types/demuxer.ts
+++ b/src/types/demuxer.ts
@@ -2,7 +2,8 @@ export interface Demuxer {
   demux(
     data: Uint8Array,
     timeOffset: number,
-    isSampleAes?: boolean
+    isSampleAes?: boolean,
+    flush?: boolean
   ): DemuxerResult;
   demuxSampleAes(
     data: Uint8Array,