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Code Issues 1 Releases Wiki Activity

Add reconnection handling to FFmpeg streams

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This commit is contained in:
Adam Goldsmith 2022-01-04 23:19:54 -05:00
parent 36c3af1446
commit d6a3fb766f
1 changed files with 39 additions and 8 deletions
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47
server/src/camera-stream.ts
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@ -1,5 +1,8 @@
import * as ffmpeg from 'fluent-ffmpeg';
import * as Mp4Frag from 'mp4frag';
import { PassThrough } from 'stream';
const RECONNECT_TIME = 5000;
interface WebcamSettings {
flipH: boolean;
@ -7,11 +10,11 @@ interface WebcamSettings {
rotate90: boolean;
}
export function make_mp4frag(
slug: string,
function start_ffmpeg(
url: URL | string,
webcamSettings: WebcamSettings
): Mp4Frag {
webcamSettings: WebcamSettings,
mp4frag: Mp4Frag
) {
let transforms = [];
if (webcamSettings.flipH) {
transforms.push('hflip');
@ -26,6 +29,7 @@ export function make_mp4frag(
const command = ffmpeg(url.toString())
.nativeFramerate()
.inputOptions([
'-timeout 5000000',
'-probesize 1048576',
'-analyzeduration 10000000',
'-use_wallclock_as_timestamps 1',
@ -48,16 +52,43 @@ export function make_mp4frag(
'-pix_fmt yuv420p',
'-movflags +dash+negative_cts_offsets',
])
.on('error', function (err) {
console.log('ffmpeg error occurred: ' + err.message);
.on('start', function (commandLine) {
console.log('Spawned FFmpeg for ' + url.toString());
});
let pipe = command.pipe(undefined, { end: false }) as PassThrough;
pipe.pipe(mp4frag);
function reconnect() {
start_ffmpeg(url, webcamSettings, mp4frag);
}
command.once('error', (err) => {
console.log(
`FFmpeg error occurred, reconnecting in ${RECONNECT_TIME}ms: ${err.message}`
);
pipe.unpipe();
command.kill('SIGKILL');
setTimeout(() => reconnect(), RECONNECT_TIME);
});
command.once('end', () => {
console.log(`FFmpeg stream ended, reconnecting in ${RECONNECT_TIME}ms:`);
pipe.unpipe();
setTimeout(() => reconnect(), RECONNECT_TIME);
});
}
export function make_mp4frag(
slug: string,
url: URL | string,
webcamSettings: WebcamSettings
): Mp4Frag {
const mp4frag = new Mp4Frag({
hlsPlaylistBase: slug,
});
command.pipe(mp4frag);
start_ffmpeg(url, webcamSettings, mp4frag);
return mp4frag;
}