olekukonko

package main

import (
	"fmt"

	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/common/hexutil"
	"github.com/ethereum/go-ethereum/crypto"
)

olekukonko

Convert audio to video with ffmpeg - examples

avectorscope

ffmpeg -i input.mp3 -filter_complex "[0:a]avectorscope=s=1920x1080,format=yuv420p[v]" -map "[v]" -map 0:a avectorscope.mp4

showcqt

ffmpeg -i input.mp3 -filter_complex "[0:a]showcqt=s=1920x1080,format=yuv420p[v]" -map "[v]" -map 0:a showcqt.mp4

ahistogram

ffmpeg -i input.mp3 -filter_complex "[0:a]ahistogram=s=1920x1080,format=yuv420p[v]" -map "[v]" -map 0:a ahistogram.mp4

olekukonko

ffmpeg

Converting Audio into Different Formats / Sample Rates

Minimal example: transcode from MP3 to WMA:
ffmpeg -i input.mp3 output.wma

You can get the list of supported formats with:
ffmpeg -formats

Convert WAV to MP3, mix down to mono (use 1 audio channel), set bit rate to 64 kbps and sample rate to 22050 Hz:

olekukonko

ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCtGFiUi6YgOC/MHX/dn6Zm1Q7DLf3GBdb3PzydCLYgsAMCqS/optBwetSgwz1euTTyZgCvZk8Qv1QlwvgRTNlonuntDZr0DE9qLjMk6qW5AnvWLkzKU0Vuiie/slPNNJw6RwT5g8E+G6bXjKw0pibv80lK25RHrF8497WFS5oxszBJEjYDAMdifPhwJbSJDvEfwcgn8xIMKyAuC0I83UJFSiN4Z5dEzqwWVy/EP7qjOBAnoSNwHG49NnKC+qwHv+As0lRCGEqDHxtk2f2wWEaGQOKr5JmtjX9yiE0mjWU+sjhB9/Is5oMgvz+xCup7Wpbs8CEkVBZwe7XbURXuDWhj [email protected]

olekukonko

This demonstrates how to make client side certificates with go

First generate the certificates with

./makecert.sh [email protected]

Run the server in one terminal

go run server.go

olekukonko

func structScan(rows *sql.Rows, model interface{}) error {
	v := reflect.ValueOf(model)
	if v.Kind() != reflect.Ptr {
		return errors.New("must pass a pointer, not a value, to StructScan destination") // @todo add new error message
	}

	v = reflect.Indirect(v)
	t := v.Type()

	cols, _ := rows.Columns()

olekukonko

package main

// This is an example of a resilient service worker program written in Go.
//
// This program will run a worker, wait 5 seconds, and run it again.
// It exits when SIGINT or SIGTERM is received, while ensuring any ongoing work
// is finished before exiting.
//
// Unexpected panics are also handled: program won't crash if the worker panics.
// However, panics in goroutines started by the worker won't be handled and have

olekukonko

// Copyright 2016 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,

olekukonko

// TxFunc is a function that can be wrapped in a transaction
type TxFunc func(tx *sql.Tx) error

// WithTx wraps a function in an sql transaction. After the function returns, the transaction is
// committed if there's no error, or rolled back if there is one.
func WithTx(db *sql.DB, f TxFunc) (err error) {
	tx, err := db.Begin()
	if err != nil {
		return err
	}

olekukonko

package main

import (
	"crypto/x509"
	"flag"
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
)