TEMP timestamp iterator bugfix

This commit is contained in:
Vanilagy
2025-05-03 21:43:29 +02:00
parent c8bb1f6e97
commit 94b797e227
3 changed files with 77 additions and 4 deletions
+67
View File
@@ -16,6 +16,72 @@
source
});
/*
const timestamps = [
4.16,
4.266666666666667,
4.373333333333333,
4.48,
4.586666666666667,
4.693333333333333,
4.8,
4.906666666666666,
5.013333333333334,
5.12,
5.226666666666667,
5.333333333333333,
5.4399999999999995,
5.546666666666667,
5.653333333333333,
5.76,
5.866666666666666,
5.973333333333333,
6.08,
6.186666666666666,
6.293333333333333,
6.4,
6.506666666666666,
6.613333333333333,
6.72,
6.826666666666666,
6.933333333333334,
7.039999999999999,
7.1466666666666665,
7.253333333333333
];
*/
const timestamps = [];
const videoTrack = await input.getPrimaryVideoTrack();
const packetSink = new Metamuxer.EncodedPacketSink(videoTrack);
for await (const packet of packetSink.packets()) {
if (packet.timestamp >= 1) {
break;
}
timestamps.push(packet.timestamp);
}
timestamps.sort((a, b) => a-b)
console.log(timestamps);
//return;
/*
const sink = new Metamuxer.EncodedPacketSink(videoTrack);
for await (const packet of sink.packets()) {
console.log(packet.sequenceNumber);
}
*/
const sink = new Metamuxer.CanvasSink(videoTrack, { width: 320 });
for await (const wrappedCanvas of sink.canvasesAtTimestamps(timestamps)) {
console.log(wrappedCanvas);
}
/*
const output = new Metamuxer.Output({
format: new Metamuxer.Mp3OutputFormat(),
target: new Metamuxer.BufferTarget()
@@ -49,6 +115,7 @@
console.log(output.target.buffer)
download(new Blob([output.target.buffer]), 'converted.mp3');
*/
/*
+8 -3
View File
@@ -526,6 +526,8 @@ export abstract class BaseMediaSampleSink<
continue;
}
// console.log('target', targetPacket);
const keyPacket = await packetSink.getKeyPacket(timestamp);
if (!keyPacket) {
pushToQueue(null);
@@ -533,15 +535,17 @@ export abstract class BaseMediaSampleSink<
}
if (lastPacket && targetPacket.sequenceNumber < lastPacket.sequenceNumber) {
// We're going back in time with this one, let's flush and reset to an clean state
// console.log('FLUSH?', lastPacket, targetPacket.sequenceNumber, lastPacket.sequenceNumber);
// We're going back in time with this one, let's flush and reset to a clean state
await decoder.flush();
timestampsOfInterest.length = 0;
}
if (
lastKeyPacket
&& keyPacket.sequenceNumber === lastKeyPacket.sequenceNumber
&& targetPacket.timestamp >= lastPacket!.timestamp
&& keyPacket.sequenceNumber === lastKeyPacket.sequenceNumber // => they're the same packet
// && targetPacket.timestamp >= lastPacket!.timestamp
&& targetPacket.sequenceNumber >= lastPacket!.sequenceNumber
) {
assert(lastPacket);
@@ -558,6 +562,7 @@ export abstract class BaseMediaSampleSink<
timestampsOfInterest.push(targetPacket.timestamp);
}
} else {
// console.log('==== RESET');
// The key packet has changed
lastKeyPacket = keyPacket;
lastPacket = keyPacket;
+2 -1
View File
@@ -1,3 +1,4 @@
- https://github.com/Vanilagy/mp4-muxer/issues/83 tell him it's possible now
- textsubtitlesource, chunked piping
- More efficient MP3 loading when reading sequentially
- More efficient MP3 loading when reading sequentially
- toCanvasImageSource might return a new videoframe; how to handle this?