static void ReadWriteAudio(string input, string output)
{
var audio = new AudioReader(input);
audio.LoadMetadataAsync().Wait();
audio.Load();
using (var writer = new AudioWriter(output, audio.Metadata.Channels, audio.Metadata.SampleRate))
{
writer.OpenWrite(true);
var frame = new AudioFrame(1);
while (true)
{
// read next sample
var f = audio.NextFrame(frame);
if (f == null)
{
break;
}
writer.WriteFrame(frame);
}
}
}
public async Task ConversionStreamTest()
{
var path = Res.GetPath(Res.Audio_Mp3);
var opath = "out-test-v-2.aac";
try
{
using var reader = new AudioReader(path);
await reader.LoadMetadataAsync();
var encoder = new AACEncoder
{
Format = "flv"
};
using (var filestream = File.Create(opath))
{
using (var writer = new AudioWriter(filestream,
reader.Metadata.Channels,
reader.Metadata.SampleRate, 16,
encoder.Create()))
{
writer.OpenWrite();
reader.Load();
await reader.CopyToAsync(writer);
}
}
using var audio = new AudioReader(opath);
await audio.LoadMetadataAsync();
Assert.True(audio.Metadata.Format.FormatName == "flv");
Assert.True(audio.Metadata.Channels == 2);
Assert.True(audio.Metadata.Streams.Length == 1);
Assert.True(Math.Abs(audio.Metadata.Duration - 1.515102) < 0.2);
}
finally
{
if (File.Exists(opath))
{
File.Delete(opath);
}
}
}
public async Task ConversionTest()
{
var path = Res.GetPath(Res.Audio_Ogg);
var opath = "out-test-2.mp3";
try
{
using var reader = new AudioReader(path);
await reader.LoadMetadataAsync();
using (var writer = new AudioWriter(opath,
reader.Metadata.Channels,
reader.Metadata.SampleRate, 16,
new MP3Encoder().Create()))
{
writer.OpenWrite();
reader.Load();
await reader.CopyToAsync(writer);
}
using var audio = new AudioReader(opath);
await audio.LoadMetadataAsync();
Assert.True(audio.Metadata.Format.FormatName == "mp3");
Assert.True(audio.Metadata.Channels == 2);
Assert.True(audio.Metadata.Streams.Length == 1);
Assert.True(Math.Abs(audio.Metadata.Duration - 1.515102) < 0.2);
}
finally
{
if (File.Exists(opath))
{
File.Delete(opath);
}
}
}
static void ReadPlayAudio(string input, string output)
{
var audio = new AudioReader(input);
audio.LoadMetadataAsync().Wait();
audio.Load();
using (var player = new AudioPlayer())
{
player.OpenWrite(audio.Metadata.SampleRate, audio.Metadata.Channels, showWindow: false);
// For simple playing, can just use "CopyTo"
// audio.CopyTo(player);
var frame = new AudioFrame(audio.Metadata.Channels);
while (true)
{
// read next frame
var f = audio.NextFrame(frame);
if (f == null)
{
break;
}
try
{
player.WriteFrame(frame);
}
catch (IOException) { break; }
catch
{
throw;
}
}
}
}
public async Task ConversionStreamTest()
{
var vpath = Res.GetPath(Res.Video_Mp4);
var apath = Res.GetPath(Res.Audio_Mp3);
var opath = "out-test-av-2.mp4";
try
{
using var vreader = new VideoReader(vpath);
await vreader.LoadMetadataAsync();
vreader.Load();
using var areader = new AudioReader(apath);
await areader.LoadMetadataAsync();
areader.Load();
// Get video and audio stream metadata
var vstream = vreader.Metadata.GetFirstVideoStream();
var astream = areader.Metadata.GetFirstAudioStream();
var encoder = new H264Encoder
{
Format = "flv"
};
using (var filestream = File.Create(opath))
{
// Prepare writer (Converting to H.264 + AAC video)
using (var writer = new AudioVideoWriter(filestream,
vstream.Width.Value,
vstream.Height.Value,
vstream.AvgFrameRateNumber,
astream.Channels.Value,
astream.SampleRateNumber, 16,
encoder.Create(),
new AACEncoder().Create()))
{
// Open for writing (this starts the FFmpeg process)
writer.OpenWrite();
// Copy raw data directly from stream to stream
var t2 = areader.DataStream.CopyToAsync(writer.InputDataStreamAudio);
var t1 = vreader.DataStream.CopyToAsync(writer.InputDataStreamVideo);
await t1;
await t2;
}
}
using var video = new VideoReader(opath);
await video.LoadMetadataAsync();
Assert.True(video.Metadata.Streams.Length == 2);
vstream = video.Metadata.GetFirstVideoStream();
astream = video.Metadata.GetFirstAudioStream();
Assert.True(Math.Abs(vstream.AvgFrameRateNumber - vreader.Metadata.AvgFramerate) < 0.1);
Assert.True(Math.Abs(video.Metadata.Duration - vreader.Metadata.Duration) < 0.2);
Assert.True(vstream.Width.Value == vreader.Metadata.Width);
Assert.True(vstream.Height.Value == vreader.Metadata.Height);
Assert.True(astream.SampleRateNumber == areader.Metadata.SampleRate);
}
finally
{
if (File.Exists(opath))
{
File.Delete(opath);
}
}
}
