mirror of
https://github.com/arcodange-org/mediabunny.git
synced 2026-09-27 10:53:50 +02:00
Fix HLS writing an incomplete init segment for sparse segments, improve decoder config validation, fix getFirstTimestamp() for Inputs with zero-packet tracks, allow zero-track muxing for some formats that allow it, add new track metadata that allows you to specify the decoder config early (enables zero-packet tracks), fix trafIndices in sparse fragmented MP4s, fix assertion errors in MPEG-TS demuxer
This commit is contained in:
Vanilagy
@@ -0,0 +1,711 @@
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import { expect, test } from 'vitest';
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import { Input } from '../../src/input.js';
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import { ALL_FORMATS } from '../../src/input-format.js';
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import { EncodedAudioPacketSource, EncodedVideoPacketSource } from '../../src/media-source.js';
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import { AudioTrackMetadata, Output } from '../../src/output.js';
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import {
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AdtsOutputFormat,
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CmafOutputFormat,
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FlacOutputFormat,
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HlsOutputFormat,
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MkvOutputFormat,
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Mp3OutputFormat,
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Mp4OutputFormat,
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MpegTsOutputFormat,
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OggOutputFormat,
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WavOutputFormat,
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} from '../../src/output-format.js';
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import { EncodedPacket } from '../../src/packet.js';
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import { Bitstream } from '../../shared/bitstream.js';
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import { BufferSource } from '../../src/source.js';
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import { BufferTarget, PathedTarget } from '../../src/target.js';
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import { InputAudioTrack, InputVideoTrack } from '../../src/input-track.js';
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type EmptyMediaVariant =
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| { type: 'mp4'; fastStart: false | 'in-memory' | 'reserve' | 'fragmented' }
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| { type: 'cmaf' }
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| { type: 'matroska' };
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test('No tracks, MP4, fastStart: false', async () => {
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await testNoTracks({ type: 'mp4', fastStart: false });
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});
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test('No tracks, MP4, fastStart: in-memory', async () => {
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await testNoTracks({ type: 'mp4', fastStart: 'in-memory' });
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});
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test('No tracks, MP4, fastStart: reserve', async () => {
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await testNoTracks({ type: 'mp4', fastStart: 'reserve' });
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});
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test('No tracks, MP4, fastStart: fragmented', async () => {
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await testNoTracks({ type: 'mp4', fastStart: 'fragmented' });
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});
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test('No tracks, CMAF', async () => {
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await testNoTracks({ type: 'cmaf' });
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});
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test('No tracks, Matroska', async () => {
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await testNoTracks({ type: 'matroska' });
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});
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// These formats are inherently multi-track, so holding zero tracks is perfectly fine
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const testNoTracks = async (variant: EmptyMediaVariant) => {
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const initTarget = new BufferTarget();
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const output = new Output({
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format: createFormat(variant),
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target: new BufferTarget(),
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initTarget: variant.type === 'cmaf' ? initTarget : undefined,
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});
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await output.start();
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await output.finalize();
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using initInput = variant.type === 'cmaf'
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? new Input({ source: new BufferSource(initTarget.buffer!), formats: ALL_FORMATS })
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: undefined;
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using input = new Input({
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source: new BufferSource(output.target.buffer!),
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formats: ALL_FORMATS,
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initInput,
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});
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expect(await input.getTracks()).toHaveLength(0);
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};
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test('No tracks, MPEG-TS', async () => {
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const output = new Output({
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format: new MpegTsOutputFormat(),
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target: new BufferTarget(),
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});
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await output.start();
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await output.finalize();
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using input = new Input({
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source: new BufferSource(output.target.buffer!),
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formats: ALL_FORMATS,
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});
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expect(await input.getTracks()).toHaveLength(0);
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});
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test('No tracks, Ogg', async () => {
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const output = new Output({
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format: new OggOutputFormat(),
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target: new BufferTarget(),
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});
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await output.start();
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await output.finalize();
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// An Ogg file is nothing but its logical bitstreams, so zero tracks means zero bytes
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expect(output.target.buffer!.byteLength).toBe(0);
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});
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test('No tracks, HLS', async () => {
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const files = new Map<string, Uint8Array>();
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const output = new Output({
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format: new HlsOutputFormat({ segmentFormat: new MpegTsOutputFormat() }),
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target: new PathedTarget('', (request) => {
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const target = new BufferTarget();
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target.on('finalized', () => files.set(request.path, new Uint8Array(target.buffer!)));
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return target;
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}),
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});
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await output.start();
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await output.finalize();
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// Without tracks there are no playlists either, so all we get is the master playlist (the root target)
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expect([...files.keys()]).toEqual(['']);
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});
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test('No tracks, MP3', async () => {
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const output = new Output({
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format: new Mp3OutputFormat(),
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target: new BufferTarget(),
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});
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await expect(output.start()).rejects.toThrow('MP3 requires exactly 1 audio track');
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});
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test('No tracks, WAVE', async () => {
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const output = new Output({
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format: new WavOutputFormat(),
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target: new BufferTarget(),
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});
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await expect(output.start()).rejects.toThrow('WAVE requires exactly 1 audio track');
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});
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test('No tracks, ADTS', async () => {
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const output = new Output({
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format: new AdtsOutputFormat(),
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target: new BufferTarget(),
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});
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await expect(output.start()).rejects.toThrow('ADTS requires exactly 1 audio track');
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});
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test('No tracks, FLAC', async () => {
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const output = new Output({
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format: new FlacOutputFormat(),
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target: new BufferTarget(),
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});
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await expect(output.start()).rejects.toThrow('FLAC requires exactly 1 audio track');
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});
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test('Empty MP4, fastStart: false', async () => {
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await testEmptyMedia({ type: 'mp4', fastStart: false });
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});
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test('Empty MP4, fastStart: in-memory', async () => {
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await testEmptyMedia({ type: 'mp4', fastStart: 'in-memory' });
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});
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test('Empty MP4, fastStart: reserve', async () => {
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await testEmptyMedia({ type: 'mp4', fastStart: 'reserve' });
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});
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test('Empty MP4, fastStart: fragmented', async () => {
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await testEmptyMedia({ type: 'mp4', fastStart: 'fragmented' });
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});
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test('Empty CMAF', async () => {
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await testEmptyMedia({ type: 'cmaf' });
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});
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test('Empty Matroska', async () => {
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await testEmptyMedia({ type: 'matroska' });
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});
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const testEmptyMedia = async (variant: EmptyMediaVariant) => {
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const initTarget = new BufferTarget();
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const output = new Output({
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format: createFormat(variant),
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target: new BufferTarget(),
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initTarget: variant.type === 'cmaf' ? initTarget : undefined,
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});
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output.addVideoTrack(new EncodedVideoPacketSource('avc'), { maximumPacketCount: 100 });
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output.addAudioTrack(new EncodedAudioPacketSource('opus'), { maximumPacketCount: 100 });
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await output.start();
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await output.finalize();
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using initInput = variant.type === 'cmaf'
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? new Input({ source: new BufferSource(initTarget.buffer!), formats: ALL_FORMATS })
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: undefined;
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using input = new Input({
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source: new BufferSource(output.target.buffer!),
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formats: ALL_FORMATS,
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initInput,
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});
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expect(await input.getTracks()).toHaveLength(0);
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};
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test('Empty MP4 with declared decoder config, fastStart: false', async () => {
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await testEmptyMediaWithDecoderConfig({ type: 'mp4', fastStart: false });
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});
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test('Empty MP4 with declared decoder config, fastStart: in-memory', async () => {
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await testEmptyMediaWithDecoderConfig({ type: 'mp4', fastStart: 'in-memory' });
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});
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test('Empty MP4 with declared decoder config, fastStart: reserve', async () => {
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await testEmptyMediaWithDecoderConfig({ type: 'mp4', fastStart: 'reserve' });
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});
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test('Empty MP4 with declared decoder config, fastStart: fragmented', async () => {
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await testEmptyMediaWithDecoderConfig({ type: 'mp4', fastStart: 'fragmented' });
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});
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test('Empty CMAF with declared decoder config', async () => {
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await testEmptyMediaWithDecoderConfig({ type: 'cmaf' });
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});
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test('Empty Matroska with declared decoder config', async () => {
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await testEmptyMediaWithDecoderConfig({ type: 'matroska' });
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});
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// VP9 and Opus need no description, so the decoder config alone is enough to fully define the tracks
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const testEmptyMediaWithDecoderConfig = async (variant: EmptyMediaVariant) => {
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const initTarget = new BufferTarget();
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const output = new Output({
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format: createFormat(variant),
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target: new BufferTarget(),
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initTarget: variant.type === 'cmaf' ? initTarget : undefined,
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});
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output.addVideoTrack(new EncodedVideoPacketSource('vp9'), {
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maximumPacketCount: 100,
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decoderConfig: {
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codec: 'vp09.00.10.08',
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codedWidth: 1280,
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codedHeight: 720,
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},
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});
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output.addAudioTrack(new EncodedAudioPacketSource('opus'), {
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maximumPacketCount: 100,
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decoderConfig: {
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codec: 'opus',
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sampleRate: 48000,
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numberOfChannels: 2,
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},
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});
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await output.start();
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await output.finalize();
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using initInput = variant.type === 'cmaf'
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? new Input({ source: new BufferSource(initTarget.buffer!), formats: ALL_FORMATS })
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: undefined;
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using input = new Input({
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source: new BufferSource(output.target.buffer!),
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formats: ALL_FORMATS,
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initInput,
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});
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const tracks = await input.getTracks();
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expect(tracks).toHaveLength(2);
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const videoTrack = tracks[0] as InputVideoTrack;
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expect(videoTrack.isVideoTrack()).toBe(true);
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expect(await videoTrack.getCodec()).toBe('vp9');
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expect(await videoTrack.getCodedWidth()).toBe(1280);
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expect(await videoTrack.getCodedHeight()).toBe(720);
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expect((await videoTrack.computePacketStats()).packetCount).toBe(0);
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const audioTrack = tracks[1] as InputAudioTrack;
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expect(audioTrack.isAudioTrack()).toBe(true);
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expect(await audioTrack.getCodec()).toBe('opus');
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expect(await audioTrack.getSampleRate()).toBe(48000);
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expect(await audioTrack.getNumberOfChannels()).toBe(2);
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expect((await audioTrack.computePacketStats()).packetCount).toBe(0);
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};
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test('Empty Ogg', async () => {
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const output = new Output({
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format: new OggOutputFormat(),
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target: new BufferTarget(),
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});
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// Ogg is audio-only, so let's go for two audio tracks here
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output.addAudioTrack(new EncodedAudioPacketSource('opus'), { maximumPacketCount: 100 });
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output.addAudioTrack(new EncodedAudioPacketSource('opus'), { maximumPacketCount: 100 });
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await output.start();
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await output.finalize();
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// Ogg has no container-level header, so without any packets, nothing at all gets written
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expect(output.target.buffer!.byteLength).toBe(0);
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});
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test('Empty Ogg with declared decoder config', async () => {
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const output = new Output({
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format: new OggOutputFormat(),
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target: new BufferTarget(),
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});
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// An OpusHead packet as specified in RFC 7845
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const description = new Uint8Array(19);
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const view = new DataView(description.buffer);
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description.set([0x4f, 0x70, 0x75, 0x73, 0x48, 0x65, 0x61, 0x64]); // 'OpusHead'
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view.setUint8(8, 1); // Version
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view.setUint8(9, 2); // Channel count
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view.setUint16(10, 312, true); // Pre-skip
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view.setUint32(12, 48000, true); // Sample rate
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view.setInt16(16, 0, true); // Output gain
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view.setUint8(18, 0); // Channel mapping family
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const metadata: AudioTrackMetadata = {
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maximumPacketCount: 100,
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decoderConfig: {
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codec: 'opus',
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sampleRate: 48000,
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numberOfChannels: 2,
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description,
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},
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};
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output.addAudioTrack(new EncodedAudioPacketSource('opus'), metadata);
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output.addAudioTrack(new EncodedAudioPacketSource('opus'), metadata);
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await output.start();
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await output.finalize();
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using input = new Input({
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source: new BufferSource(output.target.buffer!),
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formats: ALL_FORMATS,
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});
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const tracks = await input.getTracks();
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expect(tracks).toHaveLength(2);
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for (const track of tracks) {
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const audioTrack = track as InputAudioTrack;
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expect(audioTrack.isAudioTrack()).toBe(true);
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expect(await audioTrack.getCodec()).toBe('opus');
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expect(await audioTrack.getSampleRate()).toBe(48000);
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expect(await audioTrack.getNumberOfChannels()).toBe(2);
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expect((await audioTrack.computePacketStats()).packetCount).toBe(0);
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}
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});
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test('Empty WAVE', async () => {
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const output = new Output({
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format: new WavOutputFormat(),
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target: new BufferTarget(),
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});
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// WAVE holds a single audio track
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output.addAudioTrack(new EncodedAudioPacketSource('pcm-s16'), { maximumPacketCount: 100 });
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await output.start();
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// There's no information to go on, so the muxer can't make anything up
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await expect(output.finalize()).rejects.toThrow('Cannot finalize an empty WAVE file');
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});
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test('Empty WAVE with declared decoder config', async () => {
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const output = new Output({
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format: new WavOutputFormat(),
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target: new BufferTarget(),
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});
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// Deliberately not the fallback values, so we can tell the declared config was actually used
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output.addAudioTrack(new EncodedAudioPacketSource('pcm-s16'), {
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maximumPacketCount: 100,
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decoderConfig: {
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codec: 'pcm-s16',
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sampleRate: 44100,
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numberOfChannels: 1,
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},
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});
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await output.start();
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await output.finalize();
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using input = new Input({
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source: new BufferSource(output.target.buffer!),
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formats: ALL_FORMATS,
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});
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const tracks = await input.getTracks();
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expect(tracks).toHaveLength(1);
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const audioTrack = tracks[0] as InputAudioTrack;
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expect(audioTrack.isAudioTrack()).toBe(true);
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expect(await audioTrack.getCodec()).toBe('pcm-s16');
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expect(await audioTrack.getSampleRate()).toBe(44100);
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expect(await audioTrack.getNumberOfChannels()).toBe(1);
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expect((await audioTrack.computePacketStats()).packetCount).toBe(0);
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});
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test('Empty MP3', async () => {
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const output = new Output({
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format: new Mp3OutputFormat(),
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target: new BufferTarget(),
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});
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output.addAudioTrack(new EncodedAudioPacketSource('mp3'), { maximumPacketCount: 100 });
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await output.start();
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// There's no information to go on, so the muxer can't make anything up
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await expect(output.finalize()).rejects.toThrow('Cannot finalize an empty MP3 file');
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});
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test('Empty MP3 with declared decoder config', async () => {
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const output = new Output({
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format: new Mp3OutputFormat(),
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target: new BufferTarget(),
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});
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// Deliberately not the fallback values, so we can tell the declared config was actually used
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output.addAudioTrack(new EncodedAudioPacketSource('mp3'), {
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maximumPacketCount: 100,
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decoderConfig: {
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codec: 'mp3',
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sampleRate: 44100,
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numberOfChannels: 1,
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},
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});
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await output.start();
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await output.finalize();
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using input = new Input({
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source: new BufferSource(output.target.buffer!),
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formats: ALL_FORMATS,
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});
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const tracks = await input.getTracks();
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expect(tracks).toHaveLength(1);
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const audioTrack = tracks[0] as InputAudioTrack;
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expect(audioTrack.isAudioTrack()).toBe(true);
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expect(await audioTrack.getCodec()).toBe('mp3');
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expect(await audioTrack.getSampleRate()).toBe(44100);
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expect(await audioTrack.getNumberOfChannels()).toBe(1);
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expect((await audioTrack.computePacketStats()).packetCount).toBe(0);
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});
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test('Empty MP3 with priming packet', async () => {
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const output = new Output({
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format: new Mp3OutputFormat(),
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target: new BufferTarget(),
|
||||
});
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// An MPEG Version 1 Layer III frame header, 128 kbps, 32 kHz, single channel
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const frameHeader = new Uint8Array([0xff, 0xfb, 0x98, 0xc0]);
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// The priming packet takes precedence over the declared config, so we can tell which one was used
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output.addAudioTrack(new EncodedAudioPacketSource('mp3'), {
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maximumPacketCount: 100,
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decoderConfig: {
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codec: 'mp3',
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sampleRate: 44100,
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numberOfChannels: 2,
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},
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primingPacket: new EncodedPacket(frameHeader, 'key', 0, 0),
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});
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await output.start();
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await output.finalize();
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|
||||
using input = new Input({
|
||||
source: new BufferSource(output.target.buffer!),
|
||||
formats: ALL_FORMATS,
|
||||
});
|
||||
|
||||
const tracks = await input.getTracks();
|
||||
expect(tracks).toHaveLength(1);
|
||||
|
||||
const audioTrack = tracks[0] as InputAudioTrack;
|
||||
expect(audioTrack.isAudioTrack()).toBe(true);
|
||||
expect(await audioTrack.getCodec()).toBe('mp3');
|
||||
expect(await audioTrack.getSampleRate()).toBe(32000);
|
||||
expect(await audioTrack.getNumberOfChannels()).toBe(1);
|
||||
expect((await audioTrack.computePacketStats()).packetCount).toBe(0);
|
||||
});
|
||||
|
||||
test('Empty MP3 without a Xing header', async () => {
|
||||
const output = new Output({
|
||||
format: new Mp3OutputFormat({ xingHeader: false }),
|
||||
target: new BufferTarget(),
|
||||
});
|
||||
|
||||
output.addAudioTrack(new EncodedAudioPacketSource('mp3'), {
|
||||
maximumPacketCount: 100,
|
||||
decoderConfig: {
|
||||
codec: 'mp3',
|
||||
sampleRate: 44100,
|
||||
numberOfChannels: 1,
|
||||
},
|
||||
});
|
||||
|
||||
await output.start();
|
||||
|
||||
// The Xing frame is the only frame we could have synthesized, so there'd be nothing to write at all
|
||||
await expect(output.finalize()).rejects.toThrow('Cannot finalize an empty MP3 file');
|
||||
});
|
||||
|
||||
test('Empty ADTS', async () => {
|
||||
const output = new Output({
|
||||
format: new AdtsOutputFormat(),
|
||||
target: new BufferTarget(),
|
||||
});
|
||||
|
||||
output.addAudioTrack(new EncodedAudioPacketSource('aac'), { maximumPacketCount: 100 });
|
||||
|
||||
await output.start();
|
||||
|
||||
// ADTS is a bare sequence of frames, each carrying its own header, so there'd be nothing to write
|
||||
await expect(output.finalize()).rejects.toThrow('Cannot finalize an empty ADTS file');
|
||||
});
|
||||
|
||||
test('Empty ADTS with declared decoder config', async () => {
|
||||
const output = new Output({
|
||||
format: new AdtsOutputFormat(),
|
||||
target: new BufferTarget(),
|
||||
});
|
||||
|
||||
output.addAudioTrack(new EncodedAudioPacketSource('aac'), {
|
||||
maximumPacketCount: 100,
|
||||
decoderConfig: {
|
||||
codec: 'mp4a.40.2',
|
||||
sampleRate: 44100,
|
||||
numberOfChannels: 2,
|
||||
description: new Uint8Array([0x12, 0x10]), // AudioSpecificConfig: AAC-LC, 44100 Hz, stereo
|
||||
},
|
||||
});
|
||||
|
||||
await output.start();
|
||||
|
||||
// The declared config doesn't help; ADTS has no place to put it
|
||||
await expect(output.finalize()).rejects.toThrow('Cannot finalize an empty ADTS file');
|
||||
});
|
||||
|
||||
test('Empty FLAC', async () => {
|
||||
const output = new Output({
|
||||
format: new FlacOutputFormat(),
|
||||
target: new BufferTarget(),
|
||||
});
|
||||
|
||||
output.addAudioTrack(new EncodedAudioPacketSource('flac'), { maximumPacketCount: 100 });
|
||||
|
||||
await output.start();
|
||||
|
||||
// There's no information to go on, so the muxer can't make anything up
|
||||
await expect(output.finalize()).rejects.toThrow('Cannot finalize an empty FLAC file');
|
||||
});
|
||||
|
||||
test('Empty FLAC with declared decoder config', async () => {
|
||||
const output = new Output({
|
||||
format: new FlacOutputFormat(),
|
||||
target: new BufferTarget(),
|
||||
});
|
||||
|
||||
// A STREAMINFO metadata block for a 44100 Hz mono, 16-bit stream
|
||||
const description = new Uint8Array(4 + 4 + 34);
|
||||
description.set([0x66, 0x4c, 0x61, 0x43]); // 'fLaC'
|
||||
description[4] = 0x80; // Last metadata block, type STREAMINFO
|
||||
description[7] = 34; // Block size
|
||||
const streamInfo = new Bitstream(description.subarray(8));
|
||||
streamInfo.writeBits(16, 4096); // Minimum block size
|
||||
streamInfo.writeBits(16, 4096); // Maximum block size
|
||||
streamInfo.writeBits(24, 0); // Minimum frame size
|
||||
streamInfo.writeBits(24, 0); // Maximum frame size
|
||||
streamInfo.writeBits(20, 44100); // Sample rate
|
||||
streamInfo.writeBits(3, 0); // Channels - 1
|
||||
streamInfo.writeBits(5, 15); // Bits per sample - 1
|
||||
|
||||
output.addAudioTrack(new EncodedAudioPacketSource('flac'), {
|
||||
maximumPacketCount: 100,
|
||||
decoderConfig: {
|
||||
codec: 'flac',
|
||||
sampleRate: 44100,
|
||||
numberOfChannels: 1,
|
||||
description,
|
||||
},
|
||||
});
|
||||
|
||||
await output.start();
|
||||
await output.finalize();
|
||||
|
||||
using input = new Input({
|
||||
source: new BufferSource(output.target.buffer!),
|
||||
formats: ALL_FORMATS,
|
||||
});
|
||||
|
||||
const tracks = await input.getTracks();
|
||||
expect(tracks).toHaveLength(1);
|
||||
|
||||
const audioTrack = tracks[0] as InputAudioTrack;
|
||||
expect(audioTrack.isAudioTrack()).toBe(true);
|
||||
expect(await audioTrack.getCodec()).toBe('flac');
|
||||
expect(await audioTrack.getSampleRate()).toBe(44100);
|
||||
expect(await audioTrack.getNumberOfChannels()).toBe(1);
|
||||
expect((await audioTrack.computePacketStats()).packetCount).toBe(0);
|
||||
});
|
||||
|
||||
test('Empty MPEG-TS', async () => {
|
||||
const output = new Output({
|
||||
format: new MpegTsOutputFormat(),
|
||||
target: new BufferTarget(),
|
||||
});
|
||||
|
||||
output.addVideoTrack(new EncodedVideoPacketSource('avc'), { maximumPacketCount: 100 });
|
||||
output.addAudioTrack(new EncodedAudioPacketSource('aac'), { maximumPacketCount: 100 });
|
||||
|
||||
await output.start();
|
||||
await output.finalize();
|
||||
|
||||
using input = new Input({
|
||||
source: new BufferSource(output.target.buffer!),
|
||||
formats: ALL_FORMATS,
|
||||
});
|
||||
|
||||
expect(await input.getTracks()).toHaveLength(0);
|
||||
});
|
||||
|
||||
test('Empty MPEG-TS with declared decoder config', async () => {
|
||||
const output = new Output({
|
||||
format: new MpegTsOutputFormat(),
|
||||
target: new BufferTarget(),
|
||||
});
|
||||
|
||||
// An MPEG-TS stream cannot be described without a packet - it's the first packet that defines the stream - so
|
||||
// declaring the config up front changes nothing
|
||||
output.addVideoTrack(new EncodedVideoPacketSource('avc'), {
|
||||
maximumPacketCount: 100,
|
||||
decoderConfig: {
|
||||
codec: 'avc1.42001f',
|
||||
codedWidth: 1280,
|
||||
codedHeight: 720,
|
||||
description: new Uint8Array([0x01, 0x42, 0x00, 0x1f, 0xff, 0xe1, 0x00, 0x00, 0x01, 0x00, 0x00]),
|
||||
},
|
||||
});
|
||||
|
||||
await output.start();
|
||||
await output.finalize();
|
||||
|
||||
using input = new Input({
|
||||
source: new BufferSource(output.target.buffer!),
|
||||
formats: ALL_FORMATS,
|
||||
});
|
||||
|
||||
expect(await input.getTracks()).toHaveLength(0);
|
||||
});
|
||||
|
||||
test('Empty HLS', async () => {
|
||||
const files = new Map<string, Uint8Array>();
|
||||
|
||||
const output = new Output({
|
||||
format: new HlsOutputFormat({ segmentFormat: new MpegTsOutputFormat() }),
|
||||
target: new PathedTarget('', (request) => {
|
||||
const target = new BufferTarget();
|
||||
target.on('finalized', () => files.set(request.path, new Uint8Array(target.buffer!)));
|
||||
return target;
|
||||
}),
|
||||
});
|
||||
|
||||
output.addVideoTrack(new EncodedVideoPacketSource('avc'), {
|
||||
maximumPacketCount: 100,
|
||||
decoderConfig: {
|
||||
codec: 'avc1.42001f',
|
||||
codedWidth: 1280,
|
||||
codedHeight: 720,
|
||||
description: new Uint8Array([0x01, 0x42, 0x00, 0x1f, 0xff, 0xe1, 0x00, 0x00, 0x01, 0x00, 0x00]),
|
||||
},
|
||||
});
|
||||
|
||||
await output.start();
|
||||
await output.finalize();
|
||||
|
||||
// HLS only ever writes segments for packets it has actually seen, so all we get is the master playlist (which is
|
||||
// the root target) and one empty media playlist
|
||||
expect([...files.keys()].sort()).toEqual(['', 'playlist-1.m3u8']);
|
||||
});
|
||||
|
||||
const createFormat = (variant: EmptyMediaVariant) => {
|
||||
if (variant.type === 'mp4') {
|
||||
return new Mp4OutputFormat({ fastStart: variant.fastStart });
|
||||
} else if (variant.type === 'cmaf') {
|
||||
return new CmafOutputFormat();
|
||||
} else {
|
||||
return new MkvOutputFormat();
|
||||
}
|
||||
};
|
||||
Reference in New Issue
Block a user