juanpablocs

Extract subtitle from video

Assuming you have a video file named myvideo.webm, the first step is to extract the audio. To manage API limitations effectively, compress the audio as much as possible.

ffmpeg -i myvideo.webm -ac 1 -b:a 16k -map a output.webm

FFmpeg parameters explained:

juanpablocs

Commands utils s3cmd

Upload files to bucket

s3cmd sync [FOLDER]/* s3://[BUCKET] --no-progress --no-progress --acl-public --recursive

Update cors to bucket

s3cmd setcors ./cors_rule.xml s3://[BUCKET]

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Simulate app

need install loki plugin

docker plugin install grafana/loki-docker-driver:2.9.2 --alias loki --grant-all-permissions

docker command for up container and save logs with loki driver plugin

docker run -d \

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Docker run web

first create Dockerfile second build 3 push on registry github or vultr

Docker nginx basic

FROM nginx:latest

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SelectBox Typescript

version 1

import React, { FC } from 'react';

// Definición de tipos
interface Option {
  label: string;
  value: string;

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Encoder mp4 to m3u8

ffmpeg -i https://sample-videos.com/video321/mp4/720/big_buck_bunny_720p_30mb.mp4 \
-map 0:v:0 -map 0:a:0 -map 0:v:0 -map 0:a:0 -map 0:v:0 -map 0:a:0 \
-c:v libx264 -crf 22 -c:a aac -ar 48000 \
-filter:v:0 scale=w=480:h=360  -maxrate:v:0 600k -b:a:0 64k \
-filter:v:1 scale=w=640:h=480  -maxrate:v:1 900k -b:a:1 128k \
-filter:v:2 scale=w=1280:h=720 -maxrate:v:2 900k -b:a:2 128k \
-var_stream_map "v:0,a:0,name:360p v:1,a:1,name:480p v:2,a:2,name:720p" \

juanpablocs

Publish library on github registry NPM

configure github action:

name: Publish Library
on:
 release:
   types: [created]
jobs:
 publish-library:

juanpablocs

Mongo dump bash

download all db with gzip mongo backup and delete backups old 10 days before

#!/bin/bash
BACKUP_DIR="$HOME/Backup/my-site"
DATE=$(date +"%Y%m%d")
BACKUP_FILE="$BACKUP_DIR/my-site_$DATE.gz"
DAYS_TO_KEEP=10

juanpablocs

Video Stream with node.js

the part of code is express

app.get("/video", (req, res) => {
// indicates the part of a document that the server should return
// on this measure in bytes for example: range = 0-6 bytes.
const  range = req.headers.range;
if (!range) res.status(400).send("Range must be provided");

juanpablocs

hook axios sugar

import { useEffect, useRef } from 'react';
import axios, { AxiosError, AxiosRequestConfig } from 'axios';
import _useAxios, { configure } from 'axios-hooks';
import { useErrorHandler } from 'react-error-boundary';
import { useToast } from '@chakra-ui/react';

import { API_URL } from '../config';