#!/bin/bash

type ffmpeg > /dev/null 2>&1 &&  FFMPEG_OR_LIBAV=ffmpeg
type avconv > /dev/null  2>&1 &&  FFMPEG_OR_LIBAV=avconv

function task.video.change.container {
	CONTAINER=$1;
	shift;
        echo "Using $FFMPEG_OR_LIBAV for conversion."
	for video in "$@"; do
		echo "Starting processing Video: $video";
		$FFMPEG_OR_LIBAV -i "$video" -vcodec copy -acodec copy "${video}.$CONTAINER"
		echo "Processing done.";
	done
}

function task.nikon-mp4 {
	task.video.change.container mp4 "$@"
}

function task.downscale {
	TARGET=$1
	shift
	SIZE=2048
	for image in "$@"; do
		target_file=$TARGET/$(basename $image)
		echo "Downsampling image $image to $target_file"
		convert $image \
			-filter Lanczos -sampling-factor 1x1 \
			-resize "${SIZE}x${SIZE}>" \
			-quality 90 \
			$target_file
	done

}
TASK=$1
shift
task.$TASK "$@"