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Remove hackiness in "moof"-starting mp4 segments

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This commit is contained in:
Vanilagy
2026-02-24 15:22:21 +01:00
parent dd8a87c4a3
commit 49994bf9ed
1 changed files with 9 additions and 2 deletions
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src/input-format.ts
+9 -2
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@@ -69,7 +69,6 @@ export abstract class IsobmffInputFormat extends InputFormat {
if (
fourCc !== 'ftyp'
&& fourCc !== 'styp' // Segment
&& fourCc !== 'moof' // Not a legal segment, but seen in practice (sigh)
) {
return null;
}
@@ -95,7 +94,15 @@ export class Mp4InputFormat extends IsobmffInputFormat {
/** @internal */
async _canReadInput(input: Input) {
const majorBrand = await this._getMajorBrand(input);
return !!majorBrand && majorBrand !== 'qt ';
if (majorBrand !== null) {
return majorBrand !== 'qt ';
}
let slice = input._reader.requestSlice(4, 4);
if (slice instanceof Promise) slice = await slice;
if (!slice) return false;
return readAscii(slice, 4) === 'moof'; // Not a legal segment start, but seen in practice (sigh)
}
get name() {