buildAudio
fun FilterGraph.Companion.buildAudio(chain: FilterChain, sampleRate: Int, sampleFormat: SampleFormat, channels: Int, timeBase: Rational, outputSampleRate: Int = 0, outputSampleFormat: SampleFormat = SampleFormat.None, outputChannels: Int = 0, channelLayoutMask: Long? = null, outputChannelLayoutMask: Long? = null): FilterGraph
The audio half of buildVideo's chain overload, with the same refusal.