Script for downloading video from twich.tv

download-twitch-video.sh

#!/bin/bash

# Example:
#   http://www.twitch.tv/aziliann/b/633376838
#   ./download-twich-video.sh 633376838

id=$1
dir=$(pwd)
tmp_dir=".tmp-dtv-files"
video_parts_dir="$tmp_dir/$id"

set -e

urls=($(
    curl --silent "https://api.twitch.tv/api/videos/a$id" | perl -MData::Dumper -MJSON=from_json -ne'
    print $_->{url} . "\n" foreach @{from_json($_)->{chunks}->{live}}
    '
    ))

mkdir -p $video_parts_dir

for i in "${!urls[@]}"; do
    url=${urls[$i]}

    wget $url -O "$video_parts_dir/part-$i.flv" -nv
done

ffmpeg -f concat -i <(printf "file '${dir}/%s'\n" $video_parts_dir/*.flv) -c copy "$id.flv"

rm -rf $video_parts_dir

if [ $(find $tmp_dir -prune -empty -type d) ]; then
    rm -rf $tmp_dir
fi