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Add own encoded sample classes and port the code to them

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This commit is contained in:
Vanilagy
2025-01-04 00:14:34 +01:00
parent f6d12390cd
commit e83356662e
10 changed files with 694 additions and 434 deletions
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dev/demux.html
+60 -5
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@@ -1,3 +1,5 @@
<!DOCTYPE html>
<script src="../dist/metamuxer.js"></script>
<script type="module">
@@ -30,19 +32,72 @@
fileInput.addEventListener('change', async () => {
const file = fileInput.files[0];
const source = new Metamuxer.BlobSource(file);
const source = new Metamuxer.BufferSource(await file.arrayBuffer()) ?? new Metamuxer.BlobSource(file);
const start = performance.now();
const input = new Metamuxer.Input({
formats: Metamuxer.ALL_FORMATS,
source
});
const audioTrack = await input.getPrimaryAudioTrack();
const drain = new Metamuxer.EncodedAudioChunkDrain(audioTrack);
const videoTrack = await input.getPrimaryVideoTrack();
const drain = new Metamuxer.EncodedVideoSampleDrain(videoTrack);
for await (const sample of drain.samples()) {
//console.log(chunk);
}
document.body.textContent = performance.now() - start;
/*
const videoTrack = await input.getPrimaryVideoTrack();
const drain = new Metamuxer.VideoFrameDrain(videoTrack);
async function* timestamps() {
const fromTime = 0;
const toTime = await videoTrack.computeDuration();
const extractDuration = toTime - fromTime;
const drain = new Metamuxer.EncodedVideoSampleDrain(videoTrack);
const thumbnailsNeeded = 16;
for (let i = 0; i < thumbnailsNeeded; i++) {
const startTime = (extractDuration * i) / thumbnailsNeeded + fromTime;
const endTime = Math.min(
(extractDuration * (i + 1)) / thumbnailsNeeded + fromTime,
toTime + 1,
);
const sample = await drain.getSample(startTime, { onlyMetadata: true });
let bestTimestamp = sample.timestamp;
if (sample.type !== 'key') {
const nextKeySample = await drain.getNextKeySample(sample, { onlyMetadata: true });
if (nextKeySample.timestamp < endTime) {
bestTimestamp = nextKeySample.timestamp;
}
}
yield bestTimestamp;
}
}
for await (const { frame, timestamp } of drain.framesAtTimestamps(timestamps())) {
console.log(frame.timestamp, timestamp)
frame.close();
}
console.log("done")
*/
/*
const audioTrack = await input.getPrimaryVideoTrack();
const drain = new Metamuxer.EncodedVideoChunkDrain(audioTrack);
for await (const chunk of drain.chunks()) {
console.log(chunk);
//console.log(chunk);
}
console.log("Done??")
document.body.textContent = performance.now() - start;
*/
/*