public string ExtractAudioFromVideo(string outputPathWithoutExtension, string videoPath)
{
if (string.IsNullOrEmpty(outputPathWithoutExtension))
{
throw new ArgumentNullException(nameof(outputPathWithoutExtension));
}
if (string.IsNullOrEmpty(videoPath))
{
throw new ArgumentNullException(nameof(videoPath));
}
string outputPath = outputPathWithoutExtension + MediaTypeHelper.GetFileExtensionForAudioCodec(new MediaFileInfo(videoPath).AudioStreams[0].CodecName);
if (System.IO.File.Exists(outputPath))
{
System.IO.File.Delete(outputPath);
}
FFmpegProcessRunner fpr = new FFmpegProcessRunner();
fpr.OnDurationMessage += DurationMessageReceived;
fpr.OnTimeMessage += TimeMessageReceived;
totalSteps = 1;
currentStep = 1;
fpr.Run($"-i \"{videoPath}\" -vn -codec:a copy \"{outputPath}\"");
fpr.OnDurationMessage -= DurationMessageReceived;
fpr.OnTimeMessage -= TimeMessageReceived;
return(outputPath);
}
public void NormalizeVolume(string outputPath, string filePath)
{
if (string.IsNullOrEmpty(outputPath))
{
throw new ArgumentNullException(nameof(outputPath));
}
if (string.IsNullOrEmpty(filePath))
{
throw new ArgumentNullException(nameof(filePath));
}
if (System.IO.File.Exists(outputPath))
{
System.IO.File.Delete(outputPath);
}
FFmpegProcessRunner fpr = new FFmpegProcessRunner();
fpr.OnDurationMessage += DurationMessageReceived;
fpr.OnTimeMessage += TimeMessageReceived;
totalSteps = 2;
// First pass.
currentStep = 1;
string output = fpr.Run($"-i \"{filePath}\" -af loudnorm=I=-23:LRA=7:tp=-2:print_format=json -f null -");
int startIndex = output.LastIndexOf("{");
int length = output.LastIndexOf("}") - startIndex + 1;
Dictionary <string, string> loudnormOutput = Newtonsoft.Json.JsonConvert.DeserializeObject <Dictionary <string, string> >(output.Substring(startIndex, length));
// Second pass.
currentStep = 2;
string vcodecArg = string.Empty;
if (MediaTypeHelper.GetMediaTypeFromFileName(filePath) == MediaType.VIDEO)
{
vcodecArg = "-vcodec copy ";
}
fpr.Run($"-i \"{filePath}\" " +
$"-af loudnorm=I=-23:LRA=7:tp=-2:" +
$"measured_I={loudnormOutput["input_i"]}:" +
$"measured_LRA={loudnormOutput["input_lra"]}:" +
$"measured_tp={loudnormOutput["input_tp"]}:" +
$"measured_thresh={loudnormOutput["input_thresh"]}:" +
$"offset={loudnormOutput["target_offset"]}:" +
$"linear=true:print_format=json {vcodecArg}{outputPath}");
fpr.OnDurationMessage -= DurationMessageReceived;
fpr.OnTimeMessage -= TimeMessageReceived;
}
