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fix: more reliable video thumbnail generator

This commit is contained in:
Maya 2025-09-05 23:53:02 +08:00
parent 5b0d0e2cc8
commit 0481251559
1 changed files with 19 additions and 3 deletions
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22
src/lib/store/index.svelte.ts
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@ -50,7 +50,10 @@ class Files {
});
const cover = selectCover(common.picture);
if (cover) {
const blob = new Blob([cover.data], {
const arrayBuffer = cover.data.buffer instanceof ArrayBuffer
? cover.data.buffer
: new Uint8Array(cover.data).buffer;
const blob = new Blob([new Uint8Array(arrayBuffer)], {
type: cover.format,
});
file.blobUrl = URL.createObjectURL(blob);
@ -84,11 +87,19 @@ class Files {
: new Image();
mediaElement.src = URL.createObjectURL(file);
await new Promise((resolve) => {
await new Promise((resolve, reject) => {
if (isVideo) {
(mediaElement as HTMLVideoElement).onloadeddata = resolve;
const video = mediaElement as HTMLVideoElement;
// seek to 10% of video time or 2 seconds in
video.onloadeddata = () => {
const seekTime = Math.min(video.duration * 0.1, 2);
video.currentTime = seekTime;
};
video.onseeked = resolve;
video.onerror = reject;
} else {
(mediaElement as HTMLImageElement).onload = resolve;
(mediaElement as HTMLImageElement).onerror = reject;
}
});
@ -103,6 +114,11 @@ class Files {
? (mediaElement as HTMLVideoElement).videoHeight
: (mediaElement as HTMLImageElement).height;
if (width === 0 || height === 0) {
URL.revokeObjectURL(mediaElement.src);
return undefined;
}
const scale = Math.max(maxSize / width, maxSize / height);
canvas.width = width * scale;
canvas.height = height * scale;