@remotion/media-parser
Version:
A pure JavaScript library for parsing video files
116 lines (115 loc) • 4.18 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.hasAllTracksFromAvi = exports.getTracksFromAvi = exports.makeAviVideoTrack = exports.makeAviAudioTrack = exports.getNumberOfTracks = exports.TO_BE_OVERRIDDEN_LATER = void 0;
const add_avc_profile_to_track_1 = require("../../add-avc-profile-to-track");
const webcodecs_timescale_1 = require("../../webcodecs-timescale");
const timescale_1 = require("./timescale");
const traversal_1 = require("./traversal");
exports.TO_BE_OVERRIDDEN_LATER = 'to-be-overriden-later';
const getNumberOfTracks = (structure) => {
const avihBox = (0, traversal_1.getAvihBox)(structure);
if (avihBox) {
return avihBox.streams;
}
throw new Error('No avih box found');
};
exports.getNumberOfTracks = getNumberOfTracks;
const makeAviAudioTrack = ({ strf, index, }) => {
// 255 = AAC
if (strf.formatTag !== 255) {
throw new Error(`Unsupported audio format ${strf.formatTag}`);
}
return {
type: 'audio',
codec: 'mp4a.40.2', // According to Claude 3.5 Sonnet
codecData: { type: 'aac-config', data: new Uint8Array([18, 16]) },
codecEnum: 'aac',
description: new Uint8Array([18, 16]),
numberOfChannels: strf.numberOfChannels,
sampleRate: strf.sampleRate,
originalTimescale: timescale_1.MEDIA_PARSER_RIFF_TIMESCALE,
trackId: index,
startInSeconds: 0,
timescale: webcodecs_timescale_1.WEBCODECS_TIMESCALE,
};
};
exports.makeAviAudioTrack = makeAviAudioTrack;
const makeAviVideoTrack = ({ strh, strf, index, }) => {
if (strh.handler !== 'H264') {
throw new Error(`Unsupported video codec ${strh.handler}`);
}
return {
codecData: null,
codec: exports.TO_BE_OVERRIDDEN_LATER,
codecEnum: 'h264',
codedHeight: strf.height,
codedWidth: strf.width,
width: strf.width,
height: strf.height,
type: 'video',
displayAspectHeight: strf.height,
originalTimescale: timescale_1.MEDIA_PARSER_RIFF_TIMESCALE,
description: undefined,
m3uStreamFormat: null,
trackId: index,
colorSpace: {
fullRange: null,
matrix: null,
primaries: null,
transfer: null,
},
advancedColor: {
fullRange: null,
matrix: null,
primaries: null,
transfer: null,
},
displayAspectWidth: strf.width,
rotation: 0,
sampleAspectRatio: {
numerator: 1,
denominator: 1,
},
fps: strh.rate / strh.scale,
startInSeconds: 0,
timescale: webcodecs_timescale_1.WEBCODECS_TIMESCALE,
};
};
exports.makeAviVideoTrack = makeAviVideoTrack;
const getTracksFromAvi = (structure, state) => {
const tracks = [];
const boxes = (0, traversal_1.getStrlBoxes)(structure);
let i = 0;
for (const box of boxes) {
const strh = (0, traversal_1.getStrhBox)(box.children);
if (!strh) {
continue;
}
const { strf } = strh;
if (strf.type === 'strf-box-video') {
tracks.push((0, add_avc_profile_to_track_1.addAvcProfileToTrack)((0, exports.makeAviVideoTrack)({ strh, strf, index: i }), state.riff.getAvcProfile()));
}
else if (strh.fccType === 'auds') {
tracks.push((0, exports.makeAviAudioTrack)({ strf, index: i }));
}
else {
throw new Error(`Unsupported track type ${strh.fccType}`);
}
i++;
}
return tracks;
};
exports.getTracksFromAvi = getTracksFromAvi;
const hasAllTracksFromAvi = (state) => {
try {
const structure = state.structure.getRiffStructure();
const numberOfTracks = (0, exports.getNumberOfTracks)(structure);
const tracks = (0, exports.getTracksFromAvi)(structure, state);
return (tracks.length === numberOfTracks &&
!tracks.find((t) => t.type === 'video' && t.codec === exports.TO_BE_OVERRIDDEN_LATER));
}
catch (_a) {
return false;
}
};
exports.hasAllTracksFromAvi = hasAllTracksFromAvi;