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# Ctrl+Alt+F1
# sudo systemctl stop lightdm.service
# chmod 777 NVIDIA-Linux-x86_64-375.20.run
# sudo sh NVIDIA-Linux-x86_64-375.20.run

# ver 3.0
# Ctrl+Alt+F1
# sudo dpkg --add-architecture i386
# sudo apt update
# sudo apt install build-essential libc6:i386

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# https://devhints.io/ffmpeg

# Ringtone conversion using ffmpeg

ffmpeg -i foo.mp3 -ac 1 -ab 128000 -f mp4 -acodec libfaac -y target.m4r

# no audio

ffmpeg -i input.mov -vcodec h264   -an -strict -2 output.mp4
ffmpeg -i input.mov -vcodec libvpx -an output.webm

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# https://devhints.io/animated_gif

mkdir -p gif
mplayer -ao null -vo gif89a:outdir=gif $INPUT
mogrify -format gif *.png
gifsicle --colors=256 --delay=4 --loopcount=0 --dither -O3 gif/*.gif > ${INPUT%.*}.gif
rm -rf gif

# You’ll need mplayer, imagemagick and gifsicle. This converts frames to .png, then turns them into an animated gif.

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// https://www.codeatcpp.com/2011/04/autocomplete.html

int damerauLevenshteinDistance( const std::vector<char>& a, const std::vector<char>& b )
{
    const int a_size = static_cast<int>( a.size() );
    const int b_size = static_cast<int>( b.size() );
    const int INF = a_size + b_size;
    std::vector<std::vector<int> > H( a.size()+2, std::vector<int>( b.size()+2 ) );
    H[0][0] = INF;
    for ( int i = 0; i <= a_size; ++i ) { H[i+1][1] = i; H[i+1][0] = INF; }

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docker run --name pgsql-test -e POSTGRES_PASSWORD=password -d -p 6000:5432 postgress
docker ps
docker stop pgsql-test
----

// Запустить из докера компиляцию
// https://habrahabr.ru/post/342218/

docker run --rm -it -v ~/go:/go -w /go/src/gifty golang:1.9.1 \
    go build -o gifty_linux -v *.go

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#!/bin/bash

for i in *.webm; do
    ffmpeg -i "$i" -vn -ab 128k -ar 44100 -y "`basename "$i" .webm`.mp3";
done

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#!/bin/bash
for i in *.mp4; do
    ffmpeg -i "$i" -vn -acodec libmp3lame -ac 2 -qscale:a 4 -ar 48000 "`basename "$i" .mp4`.mp3"
done

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put =expand('%:p')

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youtube-dl --extract-audio --audio-format mp3 --prefer-ffmpeg URL

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for i in *.ogg; do ffmpeg -i "$i" -f mp3 "${i%.*}.mp3"; done