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AudioEncoder.cs
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AudioEncoder.cs
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using System;
using System.Collections;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Xabe.FFmpeg;
using Xabe.FFmpeg.Downloader;
using Xabe.FFmpeg.Events;
namespace KiriMusicHelper {
public class AudioConversionItem
{
public FileInfo InputFile;
public string OutputPath;
public long Bitrate;
public int SampleRate;
public string FileName { get; set; }
}
class AudioEncoder {
public static async void Init() {
//Set directory where app should look for FFmpeg
Directory.CreateDirectory(Path.Combine(Directory.GetCurrentDirectory(), "FFmpeg"));
FFmpeg.SetExecutablesPath(Path.Combine(Directory.GetCurrentDirectory(), "FFmpeg"));
//Get latest version of FFmpeg. It's great idea if you don't know if you had installed FFmpeg.
await Xabe.FFmpeg.Downloader.FFmpegDownloader.GetLatestVersion(FFmpegVersion.Official, FFmpeg.ExecutablesPath);
}
public static async Task<IMediaInfo> GetInfo(string path)
{
try
{
return await FFmpeg.GetMediaInfo(path);
} catch (Exception ex)
{
return null;
}
}
public delegate void ConversionProgressEventHandler(
object sender,
AudioConversionItem conversion,
ConversionProgressEventArgs args);
public event ConversionProgressEventHandler OnProgress;
public delegate void ConversionDoneEventHandler(
object sender,
AudioConversionItem conversion,
IConversionResult result);
public event ConversionDoneEventHandler OnConversionDone;
public async Task AudioConvert(AudioConversionItem fileToConvert, CancellationToken cancelToken)
{
var info = await GetInfo(fileToConvert.InputFile.FullName);
IAudioStream audioStream = info.AudioStreams.FirstOrDefault()
?.SetCodec(AudioCodec.libvorbis)
?.SetSampleRate(fileToConvert.SampleRate);
if (audioStream.Bitrate > fileToConvert.Bitrate)
audioStream = audioStream.SetBitrate(fileToConvert.Bitrate);
var conversion = FFmpeg.Conversions.New()
.AddStream(audioStream)
.SetOutput(fileToConvert.OutputPath);
if (File.Exists(fileToConvert.OutputPath)) File.Delete(fileToConvert.OutputPath);
conversion.OnProgress += (sender, args) =>
{
OnProgress?.Invoke(this, fileToConvert, args);
};
var result = await conversion.Start(cancelToken);
OnConversionDone?.Invoke(this, fileToConvert, result);
}
public async Task VideoConvert(ConcurrentQueue<AudioConversionItem> filesToConvert, CancellationToken cancelToken)
{
while(filesToConvert.TryDequeue(out AudioConversionItem fileToConvert))
{
var info = await GetInfo(fileToConvert.InputFile.FullName);
IStream audioStream = info.AudioStreams.FirstOrDefault()
?.SetCodec(AudioCodec.vorbis);
var conversion = await FFmpeg.Conversions.FromSnippet
.ToOgv(fileToConvert.InputFile.FullName, fileToConvert.OutputPath);
//ffmpeg -i input.mp4 -c:v libtheora -q:v 7 -c:a libvorbis -q:a 4 intro.ogv
conversion.OnProgress += (sender, args) => OnProgress?.Invoke(this, fileToConvert, args);
var result = await conversion.Start(cancelToken);
OnConversionDone?.Invoke(this, fileToConvert, result);
}
}
//
}
}