#!/usr/bin/env bash

set -x
INPUT="$1"
shift

OUTPUT="$1"
shift

SPEED="$1"
shift

FFMPEG="${FFMPEG-ffmpeg}"
GOURCE="${GOURCE-gource}"

[ -z "$SPEED" ] && SPEED=0.05

GOURCE_OPTS=(
    "--stop-at-end"
    "-s" "$SPEED" "--highlight-users" "--log-format" "custom"
    "-1920x1080"
    "--file-idle-time" "0" "--no-vsync"
    "--key" "--output-ppm-stream" "-" "--output-framerate" "60" "$INPUT"
    "--hide" "bloom,mouse,progress,filenames"
    "--auto-skip-seconds" ".01" "--multi-sampling"
)

"$GOURCE" "${GOURCE_OPTS[@]}" |
    "$FFMPEG" -y -r 60 -f image2pipe -vcodec ppm -i - -b:v 10000000 -vcodec libx265 -crf 24 "$OUTPUT"