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#!/bin/sh  

INRES=1680x1050  

test "$FPS" || FPS=29.97  

test "$OUTRES" || OUTRES=672x420  

test "$URL" || URL="http://127.0.0.1:2509/live/purrloin"  

test "$GOP" || GOP=120  

AUDIO_IN="-thread_queue_size 1024 -f dshow -channels 2 "  

VIDEO_IN="-thread_queue_size 128 -f gdigrab -framerate $FPS -i desktop"  

FILTER="-vf fps=$FPS -af aresample=async=1000 -s $OUTRES -ac 2"  

CODECS="-acodec libopus -vcodec vp8 -g $GOP"  

BIG_CLUSTERS="-live 1 -cluster_size_limit 10M -cluster_time_limit 10K"  

OUTPUT="-f webm $BIG_CLUSTERS"  

AUDIO_IN="$AUDIO_IN -i audio=\"Stereo Mix (Realtek High Definition Audio)\""  

ffmpeg $AUDIO_IN $VIDEO_IN $FILTER $CODECS $OUTPUT "$URL"