Minimal example: transcode from MP3 to WMA:
ffmpeg -i input.mp3 output.wma
You can get the list of supported formats with:
ffmpeg -formats
You can get the list of installed codecs with:
# SSL request to hostname that is not in DNS | |
> curl -o /dev/null -w @curlformat https://beta.finance.yahoo.com | |
% Total % Received % Xferd Average Speed Time Time Time Current | |
Dload Upload Total Spent Left Speed | |
100 255k 0 255k 0 0 233k 0 --:--:-- 0:00:01 --:--:-- 233k | |
Size: 261255 | |
DNS: 0.522 | |
Connect: 0.536 |
... or Why Pipelining Is Not That Easy
Golang Concurrency Patterns for brave and smart.
By @kachayev
L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns on recent CPU
L2 cache reference ........................... 7 ns 14x L1 cache
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns 20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy ............. 3,000 ns = 3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns = 20 µs
SSD random read ........................ 150,000 ns = 150 µs
Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs 4X memory
#!/bin/sh | |
# | |
# Setup a work space called `work` with two windows | |
# first window has 3 panes. | |
# The first pane set at 65%, split horizontally, set to api root and running vim | |
# pane 2 is split at 25% and running redis-server | |
# pane 3 is set to api root and bash prompt. | |
# note: `api` aliased to `cd ~/path/to/work` | |
# | |
session="work" |
#!/bin/sh | |
cd ~/proj/root | |
tmux new-session -d -s pdev | |
tmux new-window -t pdev:1 -n shell | |
tmux rename-window -t pdev:1 "shell" | |
tmux send-keys -t pdev:1 "workon pdev" Enter "PS1=\$_OLD_VIRTUAL_PS1" Enter "clear" Enter |
#!/usr/bin/env sh | |
## | |
# This is script with usefull tips taken from: | |
# https://github.com/mathiasbynens/dotfiles/blob/master/.osx | |
# | |
# install it: | |
# curl -sL https://raw.github.com/gist/2108403/hack.sh | sh | |
# |
mkdir heroku | |
cd heroku/ | |
virtualenv --no-site-packages env | |
source env/bin/activate | |
pip install bottle gevent | |
pip freeze > requirements.txt | |
cat >app.py <<EOF | |
import bottle | |
import os |