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Be even more graceful with invalid ISOBMFF files

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This commit is contained in:
Vanilagy
2025-07-10 17:47:56 +02:00
parent fba463f46b
commit 9072a7a9f7
1 changed files with 38 additions and 11 deletions
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src/isobmff/isobmff-demuxer.ts
+38 -11
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@@ -54,6 +54,7 @@ import {
isIso639Dash2LanguageCode,
roundToMultiple,
normalizeRotation,
Bitstream,
} from '../misc';
import { EncodedPacket, PLACEHOLDER_DATA } from '../packet';
import { Reader } from '../reader';
@@ -704,7 +705,6 @@ export class IsobmffDemuxer extends Demuxer {
console.warn(
'Unsupported edit list: multiple edits are not currently supported. Only using first edit.',
);
break;
}
@@ -714,7 +714,8 @@ export class IsobmffDemuxer extends Demuxer {
}
if (mediaRate !== 1) {
throw new Error('Unsupported edit list: media rate must be 1.');
console.warn('Unsupported edit list entry: media rate must be 1.');
break;
}
track.editListPreviousSegmentDurations = previousSegmentDurations;
@@ -946,7 +947,8 @@ export class IsobmffDemuxer extends Demuxer {
} else if (sampleSize === 16) {
track.info.codec = 'pcm-s16be';
} else {
throw new Error(`Unsupported sample size ${sampleSize} for codec 'twos'.`);
console.warn(`Unsupported sample size ${sampleSize} for codec 'twos'.`);
track.info.codec = null;
}
} else if (lowercaseBoxName === 'sowt') {
if (sampleSize === 8) {
@@ -954,7 +956,8 @@ export class IsobmffDemuxer extends Demuxer {
} else if (sampleSize === 16) {
track.info.codec = 'pcm-s16';
} else {
throw new Error(`Unsupported sample size ${sampleSize} for codec 'sowt'.`);
console.warn(`Unsupported sample size ${sampleSize} for codec 'sowt'.`);
track.info.codec = null;
}
} else if (lowercaseBoxName === 'raw ') {
track.info.codec = 'pcm-u8';
@@ -1197,7 +1200,8 @@ export class IsobmffDemuxer extends Demuxer {
} else if (pcmSampleSize === 32) {
track.info.codec = 'pcm-s32';
} else {
throw new Error(`Invalid ipcm sample size ${pcmSampleSize}.`);
console.warn(`Invalid ipcm sample size ${pcmSampleSize}.`);
track.info.codec = null;
}
} else {
if (pcmSampleSize === 16) {
@@ -1207,7 +1211,8 @@ export class IsobmffDemuxer extends Demuxer {
} else if (pcmSampleSize === 32) {
track.info.codec = 'pcm-s32be';
} else {
throw new Error(`Invalid ipcm sample size ${pcmSampleSize}.`);
console.warn(`Invalid ipcm sample size ${pcmSampleSize}.`);
track.info.codec = null;
}
}
} else if (track.info.codec === 'pcm-f32be') {
@@ -1219,7 +1224,8 @@ export class IsobmffDemuxer extends Demuxer {
} else if (pcmSampleSize === 64) {
track.info.codec = 'pcm-f64';
} else {
throw new Error(`Invalid fpcm sample size ${pcmSampleSize}.`);
console.warn(`Invalid fpcm sample size ${pcmSampleSize}.`);
track.info.codec = null;
}
} else {
if (pcmSampleSize === 32) {
@@ -1227,7 +1233,8 @@ export class IsobmffDemuxer extends Demuxer {
} else if (pcmSampleSize === 64) {
track.info.codec = 'pcm-f64be';
} else {
throw new Error(`Invalid fpcm sample size ${pcmSampleSize}.`);
console.warn(`Invalid fpcm sample size ${pcmSampleSize}.`);
track.info.codec = null;
}
}
}
@@ -1409,8 +1416,27 @@ export class IsobmffDemuxer extends Demuxer {
}; break;
case 'stz2': {
throw new Error('Unsupported.');
};
const track = this.currentTrack;
assert(track);
if (!track.sampleTable) {
break;
}
this.metadataReader.pos += 4; // Version + flags
this.metadataReader.pos += 3; // Reserved
const fieldSize = this.metadataReader.readU8(); // in bits
const sampleCount = this.metadataReader.readU32();
const bytes = this.metadataReader.readBytes(Math.ceil(sampleCount * fieldSize / 8));
const bitstream = new Bitstream(bytes);
for (let i = 0; i < sampleCount; i++) {
const sampleSize = bitstream.readBits(fieldSize);
track.sampleTable.sampleSizes.push(sampleSize);
}
}; break;
case 'stss': {
const track = this.currentTrack;
@@ -1737,7 +1763,8 @@ export class IsobmffDemuxer extends Demuxer {
assert(track.currentFragmentState);
if (this.currentFragment.trackData.has(track.id)) {
throw new Error('Can\'t have two trun boxes for the same track in one fragment.');
console.warn('Can\'t have two trun boxes for the same track in one fragment. Ignoring...');
break;
}
const version = this.metadataReader.readU8();