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Fix incorrect cluster insertion for Matroska demuxer

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This commit is contained in:
Vanilagy
2025-06-20 12:05:40 +02:00
parent 7dd4876c52
commit b15a5cd984
3 changed files with 14 additions and 8 deletions
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src/matroska/matroska-demuxer.ts
+6 -4
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@@ -507,16 +507,16 @@ export class MatroskaDemuxer extends Demuxer {
if (track) {
const insertionIndex = binarySearchLessOrEqual(
track.clusters,
cluster.timestamp,
x => x.timestamp,
cluster.elementStartPos,
x => x.elementStartPos,
);
track.clusters.splice(insertionIndex + 1, 0, cluster);
if (hasKeyFrame) {
const insertionIndex = binarySearchLessOrEqual(
track.clustersWithKeyFrame,
cluster.timestamp,
x => x.timestamp,
cluster.elementStartPos,
x => x.elementStartPos,
);
track.clustersWithKeyFrame.splice(insertionIndex + 1, 0, cluster);
}
@@ -1268,6 +1268,7 @@ abstract class MatroskaTrackBacking implements InputTrackBacking {
private findBlockInClustersForTimestamp(timestampInTimescale: number) {
const clusterIndex = binarySearchLessOrEqual(
// This array is technically not sorted by start timestamp, but for any reasonable file, it basically is.
this.internalTrack.clusters,
timestampInTimescale,
x => x.trackData.get(this.internalTrack.id)!.startTimestamp,
@@ -1295,6 +1296,7 @@ abstract class MatroskaTrackBacking implements InputTrackBacking {
private findKeyBlockInClustersForTimestamp(timestampInTimescale: number) {
const indexInKeyFrameClusters = binarySearchLessOrEqual(
// This array is technically not sorted by start timestamp, but for any reasonable file, it basically is.
this.internalTrack.clustersWithKeyFrame,
timestampInTimescale,
x => x.trackData.get(this.internalTrack.id)!.firstKeyFrameTimestamp!,