package main

import (
    ffmpeg "github.com/u2takey/ffmpeg-go"
)

func mergeStreams(path1 string, path2 string, output string) (err error) {
    input := []*ffmpeg.Stream{ffmpeg.Input(path1), ffmpeg.Input(path2)}

    defaultArgs := ffmpeg.KwArgs{"c:v": "copy", "c:a": "copy", "format": "matroska"}

    var ffmpegLogLevel ffmpeg.KwArgs
    var silent bool

    if Flags.Verbose {
        ffmpegLogLevel = ffmpeg.KwArgs{"v": "info"}
        silent = false
    } else if Flags.Quiet {
        ffmpegLogLevel = ffmpeg.KwArgs{"v": "quiet"}
        silent = true
    } else {
        ffmpegLogLevel = ffmpeg.KwArgs{"v": "error"}
        silent = true
    }

    kwArgs := ffmpeg.MergeKwArgs([]ffmpeg.KwArgs{ffmpegLogLevel, defaultArgs})

    return ffmpeg.Output(input, output, kwArgs).OverWriteOutput().ErrorToStdOut().Silent(silent).Run()
}