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Reproduction case for many clips freezing issue #87

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Reproduction case for many clips freezing issue #87

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725fa4d
Update playground to reproduce many clips performance issue
remorses Nov 24, 2025
f2e194d
Simplify playground to only include video clips for performance testing
remorses Nov 24, 2025
6c0fc64
Adjust clips configuration for reproduction
remorses Nov 24, 2025
4d6fd12
update package
remorses Nov 26, 2025
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10 changes: 5 additions & 5 deletions package-lock.json
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2 changes: 1 addition & 1 deletion package.json
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,6 @@
"vite": "^7.2.2"
},
"dependencies": {
"@diffusionstudio/core": "^4.0.0"
"@diffusionstudio/core": "^4.0.2"
}
}
285 changes: 18 additions & 267 deletions playground/composition.ts
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Original file line number Diff line number Diff line change
@@ -1,285 +1,36 @@
import * as core from '@diffusionstudio/core-v4';
import * as core from '@diffusionstudio/core';

export const settings: core.CompositionSettings = {
background: '#76b7f5',
};

export async function main(composition: core.Composition) {
const font = await core.loadFont({
family: 'Geologica',
weight: '800',
});

core.env.experimental_timeBase = 30;
core.env.experimental_canonicalTimeBase = 48_000;

const sources = await Promise.all([
core.Source.from<core.VideoSource>('/bbb_1080p_30fps.mp4'),
core.Source.from<core.ImageSource>('/lenna.png'),
core.Source.from<core.AudioSource>('/harvard.MP3'),
core.Source.from<core.CaptionSource>('/captions.json'),
core.Source.from<core.AudioSource>('/file_example_MP3_1MG.mp3'),
core.Source.from<core.ImageSource>('/parrot.jpg')
]);

const mask = new core.RectangleMask({
x: 1920 / 2,
y: 1080 / 2,
width: 1080,
height: 1080,
radius: 100,
});
const videoSource = await core.Source.from<core.VideoSource>('/bbb_1080p_30fps.mp4');

const videoClip = new core.VideoClip(sources[0], {
position: 'center',
mask,
height: '100%',
animations: [
{
key: 'scale',
frames: [
{ time: 0, value: 0.5 },
{ time: 2, value: 1 },
],
},
{
key: 'rotation',
frames: [
{ time: 0, value: 0 },
{ time: 2, value: 720 },
],
},
{
key: 'opacity',
frames: [
{ time: 0, value: 100 },
{ time: 1, value: 80 },
{ time: 2, value: 100 },
],
}
],
range: [0.8, 18],
delay: 1,
})
const CLIPS = 40;
const videoDuration = 20;
const minClipDuration = 3;
const slideStep = videoDuration / CLIPS;

const videoLayer = new core.Layer();
const videoLayer = new core.Layer({ mode: 'SEQUENTIAL' });
await composition.add(videoLayer);
await videoLayer.add(videoClip);

const imageClip = new core.ImageClip(sources[1], {
position: 'center',
height: 600,
duration: 6,
effects: [
{
type: 'contrast',
value: 60,
},
{
type: 'sepia',
value: 100,
},
{
type: 'drop-shadow',
value: {
offsetX: -9,
offsetY: 9,
blur: 3,
color: '#e81',
},
},
],
animations: [
{
key: 'translateX',
frames: [
{ time: 0, value: -1000 },
{ time: 2, value: 1000 },
{ time: 4, value: 0 }
],
},
]
});

const imageLayer = new core.Layer();
await composition.add(imageLayer);
await imageLayer.add(imageClip);

const audioClip = new core.AudioClip(sources[2]);

const audioLayer = new core.Layer();
await composition.add(audioLayer);
await audioLayer.sequential();
await audioLayer.add(audioClip);
await audioClip.removeSilences();

const captionLayer = new core.Layer();
await composition.add(captionLayer);
const captionClip = new core.CaptionClip(sources[3]);
await captionLayer.add(captionClip);

const textLayer0 = new core.Layer();
await composition.add(textLayer0);
await textLayer0.add(new core.TextClip({
text: "Basic text in \nDiffusion Studio",
align: 'center',
baseline: 'middle',
fontSize: 14,
strokes: [{
width: 3,
color: '#000000',
}],
x: '50%',
y: '15%',
rotation: 45,
}));
for (let i = 0; i < CLIPS; i++) {
const startTime = i * slideStep;
const endTime = startTime + minClipDuration;

const textLayer1 = new core.Layer();
await composition.add(textLayer1);
await textLayer1.add(
new core.TextClip({
align: 'center',
baseline: 'middle',
fontSize: 14,
x: '75%',
y: '40%',
casing: 'upper',
duration: 20,
animations: [{
key: 'text',
easing: 'ease-out',
frames: [
{ time: 0, value: '' },
{ time: 20 / 30, value: 'Animated Text' },
],
}]
})
);
if (endTime > videoDuration) continue;

const rectangleLayer = new core.Layer();
await composition.add(rectangleLayer);
await rectangleLayer.add(
new core.RectangleClip({
const videoClip = new core.VideoClip(videoSource, {
position: 'center',
delay: 6,
duration: 4,
fill: '#FF0000',
radius: 10,
strokes: [{
width: 2,
color: '#000000',
}],
animations: [
{
key: 'x',
easing: 'ease-in-out',
frames: [
{ time: 2.6, value: 960 },
{ time: 4, value: 50 },
],
},
{
key: 'width',
easing: 'ease-in-out',
frames: [
{ time: 0, value: 0 },
{ time: 2, value: 1000 },
{ time: 4, value: 60 },
],
},
{
key: 'height',
easing: 'ease-in-out',
frames: [
{ time: 0, value: 0 },
{ time: 2, value: 700 },
{ time: 4, value: 40 },
],
},
{
key: 'fill',
frames: [
{ time: 0, value: '#FF0000' },
{ time: 4, value: '#00FF00' },
],
}
]
})
)

const circleLayer = new core.Layer();
await composition.add(circleLayer);
await circleLayer.add(
new core.EllipseClip({
position: 'center',
x: '70%',
fill: '#FFFF00',
radius: 90,
blendMode: 'screen',
})
);

const textLayer2 = new core.Layer();
await composition.add(textLayer2);
await textLayer2.add(
new core.TextClip({
text: `This is a Complex Text`,
duration: 12,
align: 'center',
baseline: 'middle',
font,
casing: 'upper',
fontSize: 12,
background: {
borderRadius: 20,
opacity: 40,
},
strokes: [{
width: 2,
color: '#000000',
}],
y: '85%',
x: '50%',
shadows: [{
opacity: 70,
blur: 7,
offsetX: 2,
offsetY: 4,
}],
styles: [{
start: 8,
style: {
color: '#19fa2c'
}
}],
})
)


const audioClip1 = new core.AudioClip(sources[4], { volume: 0.2, duration: 20 });
const audioLayer1 = new core.Layer();
await composition.add(audioLayer1);
await audioLayer1.add(audioClip1);

const imageLayer2 = new core.Layer();
await composition.add(imageLayer2);
await imageLayer2.add(
new core.ImageClip(sources[1], {
height: 300,
delay: 2,
duration: 3,
transition: {
duration: 3,
type: 'dissolve',
}
})
)
height: '100%',
range: [startTime, endTime],
duration: minClipDuration,
});

await imageLayer2.add(
new core.ImageClip(sources[5], {
height: 300,
delay: 5,
duration: 3,
})
)
await videoLayer.add(videoClip);
}
}
2 changes: 1 addition & 1 deletion playground/controls.ts
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
import * as core from '@diffusionstudio/core-v4';
import * as core from '@diffusionstudio/core';
import { render } from './render';

export function setupControls(composition: core.Composition) {
Expand Down
2 changes: 1 addition & 1 deletion playground/main.ts
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
import * as core from '@diffusionstudio/core-v4';
import * as core from '@diffusionstudio/core';
import { setupControls } from './controls';
import { setupTimeline } from './timeline';
import { main, settings } from './composition';
Expand Down
2 changes: 1 addition & 1 deletion playground/render.ts
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
import * as core from '@diffusionstudio/core-v4';
import * as core from '@diffusionstudio/core';

let fps = 30;

Expand Down
4 changes: 2 additions & 2 deletions playground/timeline.ts
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
import * as core from '@diffusionstudio/core-v4';
import * as core from '@diffusionstudio/core';

export function setupTimeline(composition: core.Composition) {
composition.on('playback:time', () => {
Expand Down Expand Up @@ -26,4 +26,4 @@ export function setupTimeline(composition: core.Composition) {
}

const timeline = document.querySelector('[id="timeline"]') as HTMLDivElement;
const cursor = document.querySelector('[id="timeline"] > div') as HTMLDivElement;
const cursor = document.querySelector('[id="timeline"] > div') as HTMLDivElement;