:wave: I’m actually having the same issue with a f...

# multiplatform

[Bob]

👋 I’m actually having the same issue with a ffmpeg command string builder.

Swift *let* command = shared.FFmpegCommand.Builder() <- ‘init()’ is unavailable

Kotlin

class FFmpegCommand private constructor(
    private val inputs: String?,
    private val concat: String?,
    val command: StringBuilder = StringBuilder("-y")
        .append(inputs)
        .append(concat)
) {

    data class Builder(
        var inputs: List<String> = emptyList(),
        var concat: String? = "",
    ) {

        fun inputs(inputs: List<String>) = apply { this.inputs = inputs }
        fun concat(output: String) = apply { this.concat = buildConcatFilter(this.inputs.size, output)}
        fun build() = FFmpegCommand(
            inputs.joinToString("") { " -i $it" },
            concat,
        ).command.toString()

        private fun buildConcatFilter(size: Int, output: String): String {
            val filterBuilder = StringBuilder(" -filter_complex \"")
            for (i in 0..size) filterBuilder.append("[$i]")
            filterBuilder.append("concat=n=$size:v=1:a=1[v1][a1]\"")
            filterBuilder.append(" -map '[v0]'")
            filterBuilder.append(" $output")

            return filterBuilder.toString()
        }
    }
}

I need to the defaulting for the builder. I’m not sure how to get around this one