/
transcode.test.ts
142 lines (113 loc) · 4.42 KB
/
transcode.test.ts
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import * as path from 'node:path';
import * as fs from 'node:fs';
import { assert } from 'chai';
import ffmpeg from '@mmomtchev/ffmpeg';
import { Muxer, Demuxer, VideoDecoder, VideoEncoder, AudioDecoder, AudioEncoder, Discarder } from '@mmomtchev/ffmpeg/stream';
ffmpeg.setLogLevel(process.env.DEBUG_FFMPEG ? ffmpeg.AV_LOG_DEBUG : ffmpeg.AV_LOG_ERROR);
const tempFile = path.resolve(__dirname, 'temp.mp4');
describe('transcode', () => {
afterEach('delete temporary', (done) => {
if (!process.env.DEBUG_ALL && !process.env.DEBUG_MUXER)
fs.rm(tempFile, done);
else
done();
});
it('audio / video multiplexing', (done) => {
const input = new Demuxer({ inputFile: path.resolve(__dirname, 'data', 'launch.mp4') });
input.on('ready', () => {
try {
assert.lengthOf(input.streams, 2);
assert.lengthOf(input.audio, 1);
assert.lengthOf(input.video, 1);
const audioInput = new AudioDecoder(input.audio[0]);
const videoInput = new VideoDecoder(input.video[0]);
const videoDefinition = videoInput.definition();
const audioDefinition = audioInput.definition();
const videoOutput = new VideoEncoder({
type: 'Video',
codec: ffmpeg.AV_CODEC_H264,
bitRate: 2.5e6,
width: videoDefinition.width,
height: videoDefinition.height,
frameRate: new ffmpeg.Rational(25, 1),
pixelFormat: videoDefinition.pixelFormat
});
const audioOutput = new AudioEncoder({
type: 'Audio',
codec: ffmpeg.AV_CODEC_AAC,
bitRate: 128e3,
sampleRate: audioDefinition.sampleRate,
sampleFormat: audioDefinition.sampleFormat,
channelLayout: audioDefinition.channelLayout
});
const output = new Muxer({ outputFile: tempFile, streams: [videoOutput, audioOutput] });
output.on('finish', done);
input.on('error', done);
output.on('error', done);
input.video[0].pipe(videoInput).pipe(videoOutput).pipe(output.video[0]);
input.audio[0].pipe(audioInput).pipe(audioOutput).pipe(output.audio[0]);
} catch (err) {
done(err);
}
});
});
it('only video', (done) => {
const input = new Demuxer({ inputFile: path.resolve(__dirname, 'data', 'launch.mp4') });
input.on('ready', () => {
try {
assert.lengthOf(input.streams, 2);
assert.lengthOf(input.audio, 1);
assert.lengthOf(input.video, 1);
const audioDiscard = new Discarder();
const videoInput = new VideoDecoder(input.video[0]);
const videoDefinition = videoInput.definition();
const videoOutput = new VideoEncoder({
type: 'Video',
codec: ffmpeg.AV_CODEC_H264,
bitRate: 2.5e6,
width: videoDefinition.width,
height: videoDefinition.height,
frameRate: new ffmpeg.Rational(25, 1),
pixelFormat: videoDefinition.pixelFormat
});
const output = new Muxer({ outputFile: tempFile, streams: [videoOutput] });
output.on('finish', done);
input.on('error', done);
output.on('error', done);
input.video[0].pipe(videoInput).pipe(videoOutput).pipe(output.video[0]);
input.audio[0].pipe(audioDiscard);
} catch (err) {
done(err);
}
});
});
it('only audio', (done) => {
const input = new Demuxer({ inputFile: path.resolve(__dirname, 'data', 'launch.mp4') });
input.on('ready', () => {
try {
assert.lengthOf(input.streams, 2);
assert.lengthOf(input.audio, 1);
assert.lengthOf(input.video, 1);
const audioInput = new AudioDecoder(input.audio[0]);
const videoDiscard = new Discarder();
const audioDefinition = audioInput.definition();
const audioOutput = new AudioEncoder({
type: 'Audio',
codec: ffmpeg.AV_CODEC_AAC,
bitRate: 128e3,
sampleRate: audioDefinition.sampleRate,
sampleFormat: audioDefinition.sampleFormat,
channelLayout: audioDefinition.channelLayout
});
const output = new Muxer({ outputFile: tempFile, streams: [audioOutput] });
output.on('finish', done);
input.on('error', done);
output.on('error', done);
input.audio[0].pipe(audioInput).pipe(audioOutput).pipe(output.audio[0]);
input.video[0].pipe(videoDiscard);
} catch (err) {
done(err);
}
});
});
});