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Clean up some code, add new source getting for Input

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This commit is contained in:
Vanilagy
2026-03-04 09:34:37 +01:00
parent cfb5418fa0
commit 6d5821aa74
9 changed files with 498 additions and 430 deletions
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examples/metadata-extraction/metadata-extraction.ts
+34 -21
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@@ -10,15 +10,21 @@ const horizontalRule = document.querySelector('hr') as HTMLHRElement;
const bytesReadElement = document.querySelector('#bytes-read') as HTMLParagraphElement;
const metadataContainer = document.querySelector('#metadata-container') as HTMLDivElement;
const extractMetadata = (resource: File | string) => {
const extractMetadata = async (resource: File | string) => {
// Create a new input from the resource
const source = resource instanceof File
? new BlobSource(resource)
: new UrlSource(resource);
const input = new Input({
source,
formats: ALL_FORMATS, // Accept all formats
});
let input: Input;
if (resource instanceof File) {
input = new Input({
source: new BlobSource(resource),
formats: ALL_FORMATS, // Accept all formats
});
} else {
input = new Input({
entryPath: resource,
source: ({ path }) => new UrlSource(path),
formats: ALL_FORMATS, // Accept all formats
});
}
let bytesRead = 0;
let fileSize: number | null = null;
@@ -31,13 +37,18 @@ const extractMetadata = (resource: File | string) => {
}
};
input.source.onread = (start, end) => {
const source = await input.getSource();
source.onread = (start, end) => {
bytesRead += end - start;
updateBytesRead();
};
// Get the input's size
void input.source.getSize().then(size => fileSize = size);
void source.getSize().then((size) => {
fileSize = size;
updateBytesRead();
});
// This object contains all the data that gets displayed:
const object = {
@@ -46,26 +57,28 @@ const extractMetadata = (resource: File | string) => {
'Starts at': input.getFirstTimestamp().then(start => `${start} seconds`),
'Ends at': input.computeDuration().then(duration => `${duration} seconds`),
'Tracks': input.getTracks().then(tracks => tracks.map(track => ({
'Type': track.type,
'Codec': track.codec,
'Type': track.resolve('type').then(type => type),
'Codec': track.resolve('codec').then(codec => codec),
'Full codec string': track.getCodecParameterString(),
'Starts at': track.getFirstTimestamp().then(start => `${start} seconds`),
'Ends at': track.computeDuration().then(duration => `${duration} seconds`),
'Language code': track.languageCode,
'Language code': track.resolve('languageCode').then(languageCode => languageCode),
...(track.isVideoTrack()
? {
'Coded width': `${track.codedWidth} pixels`,
'Coded height': `${track.codedHeight} pixels`,
'Rotation': `${track.rotation}° clockwise`,
'Pixel aspect ratio': `${track.pixelAspectRatio.num}:${track.pixelAspectRatio.den}`,
'Display width': `${track.displayWidth} pixels`,
'Display height': `${track.displayHeight} pixels`,
'Coded width': track.resolve('codedWidth').then(codedWidth => `${codedWidth} pixels`),
'Coded height': track.resolve('codedHeight').then(codedHeight => `${codedHeight} pixels`),
'Rotation': track.resolve('rotation').then(rotation => `${rotation}° clockwise`),
'Pixel aspect ratio': track.resolve('pixelAspectRatio').then(pixelAspectRatio =>
`${pixelAspectRatio.num}:${pixelAspectRatio.den}`,
),
'Display width': track.resolve('displayWidth').then(displayWidth => `${displayWidth} pixels`),
'Display height': track.resolve('displayHeight').then(displayHeight => `${displayHeight} pixels`),
'Transparency': track.canBeTransparent(),
}
: track.isAudioTrack()
? {
'Number of channels': track.numberOfChannels,
'Sample rate': `${track.sampleRate} Hz`,
'Number of channels': track.resolve('numberOfChannels').then(numberOfChannels => numberOfChannels),
'Sample rate': track.resolve('sampleRate').then(sampleRate => `${sampleRate} Hz`),
}
: {}),
'Packet statistics': shortDelay().then(() => track.computePacketStats()).then(stats => ({