protected override string GetAudioArguments(StreamState state, EncodingOptions encodingOptions)
{
var audioCodec = EncodingHelper.GetAudioEncoder(state);
if (!state.IsOutputVideo)
{
if (string.Equals(audioCodec, "copy", StringComparison.OrdinalIgnoreCase))
{
return("-acodec copy");
}
var audioTranscodeParams = new List <string>();
audioTranscodeParams.Add("-acodec " + audioCodec);
if (state.OutputAudioBitrate.HasValue)
{
audioTranscodeParams.Add("-ab " + state.OutputAudioBitrate.Value.ToString(UsCulture));
}
if (state.OutputAudioChannels.HasValue)
{
audioTranscodeParams.Add("-ac " + state.OutputAudioChannels.Value.ToString(UsCulture));
}
if (state.OutputAudioSampleRate.HasValue)
{
audioTranscodeParams.Add("-ar " + state.OutputAudioSampleRate.Value.ToString(UsCulture));
}
audioTranscodeParams.Add("-vn");
return(string.Join(" ", audioTranscodeParams.ToArray()));
}
if (string.Equals(audioCodec, "copy", StringComparison.OrdinalIgnoreCase))
{
var videoCodec = EncodingHelper.GetVideoEncoder(state, encodingOptions);
if (string.Equals(videoCodec, "copy", StringComparison.OrdinalIgnoreCase) && state.EnableBreakOnNonKeyFrames(videoCodec))
{
return("-codec:a:0 copy -copypriorss:a:0 0");
}
return("-codec:a:0 copy");
}
var args = "-codec:a:0 " + audioCodec;
var channels = state.OutputAudioChannels;
if (channels.HasValue)
{
args += " -ac " + channels.Value;
}
var bitrate = state.OutputAudioBitrate;
if (bitrate.HasValue)
{
args += " -ab " + bitrate.Value.ToString(UsCulture);
}
if (state.OutputAudioSampleRate.HasValue)
{
args += " -ar " + state.OutputAudioSampleRate.Value.ToString(UsCulture);
}
args += " " + EncodingHelper.GetAudioFilterParam(state, encodingOptions, true);
return(args);
}