void TranscodeVideoTest(string filename)
{
using (MFSystem.Start())
{
var details = VideoAttributes.TestFor(filename);
TraceInfo.WriteLine("Frame Rate: {0}, Frame Size: {1}x{2}, Video: {3} @ {4}Mbs, Audio: {5}, {6}Khz @ {7}Kbs, ".F
(details.FrameRate,
details.FrameSize.Width,
details.FrameSize.Height,
details.VideoEncoding,
details.BitRate == 0 ? "-- " : details.BitRate.ToString(),
details.AudioEncoding,
details.AudioSamplesPerSecond / 1000,
details.AudioAverageBytesPerSecond / 1000));
TraceInfo.WriteLine("Begining video re-encoding.");
details.Transcoder.ProcessVideo((readers, saveToSink) =>
{
readers.First().SourceReader.Samples(AVOperations.FadeIn(saveToSink));
});
TraceInfo.WriteLine("Video converted. Review the video file {0} to confirm it looks OK.", details.Transcoder.DestinationFile);
TraceInfo.WriteLine("Success!");
}
}
public void _OverlayRaceDataOntoVideo(Action <long, long> progress, Action completed, bool highlightOnly, CancellationToken token)
{
bool TranscodeFull = !highlightOnly;
var transcodeHigh = new Task(() => TranscodeAndOverlayMarshaled.Apply("HighLights", gameDataFile, videoBitRate, destinationHighlightsFile, true, highlightOnly ? progress : null, token));
var transcodeFull = new Task(() => TranscodeAndOverlayMarshaled.Apply("Full", gameDataFile, videoBitRate, destinationFile, false, progress, token));
using (MFSystem.Start())
{
var waits = new List <Task>();
transcodeHigh.Start();
waits.Add(transcodeHigh);
//Seem to have some kind of bug in MediaFoundation - where if two threads attempt to open source Readers to the same file, we get exception raised.
//To work around issue, delay the start of the second transcoder - so we dont have two threads opening at the same time.
if (TranscodeFull)
{
Thread.Sleep(10000);
transcodeFull.Start();
waits.Add(transcodeFull);
}
Task.WaitAll(waits.ToArray());
}
completed();
}
public Main()
{
InitializeComponent();
mfSystem = MFSystem.Start();
player = new Player(this.Handle);
}
void TranscodeVideoTest(string filename)
{
List <int> supportedAudioBitRates = new List <int>();
using (MFSystem.Start())
{
var details = VideoAttributes.TestFor(filename);
TraceInfo.WriteLine("Frame Rate: {0}, Frame Size: {1}x{2}, Video: {3} @ {4}Mbs, Audio: {5}, {6}Khz @ {7}Kbs, ".F
(details.FrameRate,
details.FrameSize.Width,
details.FrameSize.Height,
details.VideoEncoding,
details.BitRate == 0 ? "-- " : details.BitRate.ToString(),
details.AudioEncoding,
details.AudioSamplesPerSecond / 1000,
details.AudioAverageBytesPerSecond / 1000));
TraceInfo.WriteLine("Begining video re-encoding.");
details.Transcoder.ProcessVideo((readers, saveToSink) =>
{
int lastSecond = 0;
var fn = AVOperations.FadeIn(saveToSink);
readers.First().SourceReader.Samples(sample => {
if (sample.Stream.CurrentMediaType.IsVideo && sample.Sample != null)
{
var s = (int)sample.Sample.SampleTime.FromNanoToSeconds();
if (s != lastSecond)
{
TraceInfo.WriteLine("Converted: {0} seconds", s);
}
lastSecond = s;
if (s > 10)
{
return(false);
}
}
return(fn(sample));
});
});
TraceInfo.WriteLine("Video converted. Review the video file {0} to confirm it looks OK.", details.Transcoder.DestinationFile);
TraceInfo.WriteLine("Success!");
}
}
MediaType CreateTargetAudioMediaType(MediaType nativeMediaType)
{
var numberOfChannels = nativeMediaType.AudioNumberOfChannels;
var sampleRate = nativeMediaType.AudioSamplesPerSecond;
var availableTypes = MFSystem.TranscodeGetAudioOutputAvailableTypes(TARGET_AUDIO_FORMAT, MFT_EnumFlag.All);
TraceDebug.WriteLine("Searching for audio transcoding for sampleRate of {0}khz and {1} channels".F(sampleRate / 1000, numberOfChannels));
var type = availableTypes
.OrderByDescending(t => t.AudioAverageBytesPerSecond)
.ThenByDescending(t => t.AudioNumberOfChannels)
.FirstOrDefault(t => t.AudioSamplesPerSecond == sampleRate && t.AudioNumberOfChannels == numberOfChannels);
if (type == null)
{
TraceDebug.WriteLine("No audio transcoder found. Searching for transcoding with 2 or fewer channels at any sample rate");
type = availableTypes
.OrderByDescending(t => t.AudioAverageBytesPerSecond)
.ThenByDescending(t => t.AudioNumberOfChannels)
.FirstOrDefault(t => t.AudioNumberOfChannels <= 2);
}
if (type == null)
{
TraceDebug.WriteLine("No audio transcoder found. Search for first compatible transcoder");
type = availableTypes
.OrderByDescending(t => t.AudioAverageBytesPerSecond)
.ThenByDescending(t => t.AudioNumberOfChannels)
.FirstOrDefault();
}
if (type != null)
{
TraceDebug.WriteLine("Found audio track. SampleRate: {0}, Channels: {1}, BitRate: {2}kbs".F(type.AudioSamplesPerSecond / 1000, type.AudioNumberOfChannels, type.AudioAverageBytesPerSecond * 8 / 1000));
return(new MediaType(type));
}
throw new Exception("Unable to find target audio format");
}
public static VideoDetails TestFor(string videoFileName)
{
List <int> supportedAudioBitRates = new List <int>();
using (MFSystem.Start())
{
var readWriteFactory = new ReadWriteClassFactory();
var sourceReader = readWriteFactory.CreateSourceReaderFromURL(videoFileName, null);
var videoStream = sourceReader.Streams.FirstOrDefault(s => s.IsSelected && s.NativeMediaType.IsVideo);
if (videoStream.IsNull)
{
throw new Exception("Unable to find video track within file.");
}
var audioStream = sourceReader.Streams.FirstOrDefault(s => s.IsSelected && s.NativeMediaType.IsAudio);
if (audioStream.IsNull)
{
throw new Exception("Unable to find audio track within file.");
}
var channels = audioStream.NativeMediaType.AudioNumberOfChannels;
var sampleRate = audioStream.NativeMediaType.AudioSamplesPerSecond;
var types = MFSystem.TranscodeGetAudioOutputAvailableTypes(MediaFoundation.MFMediaType.WMAudioV9, MediaFoundation.Transform.MFT_EnumFlag.All);
foreach (var bitRate in types
.Where(t => t.AudioSamplesPerSecond == sampleRate)
.Select(t => t.AudioAverageBytesPerSecond)
.Distinct()
.OrderBy(t => t))
{
supportedAudioBitRates.Add(bitRate);
}
int videoBitRate = 0;
videoStream.NativeMediaType.TryGetBitRate(out videoBitRate);
var audioSamplesPerSecond = audioStream.NativeMediaType.AudioSamplesPerSecond;
var audioAverageBytesPerSecond = audioStream.NativeMediaType.AudioAverageBytesPerSecond;
var audioSubTypeName = audioStream.CurrentMediaType.SubTypeName;
var videoSubTypeName = videoStream.CurrentMediaType.SubTypeName;
var transcoder = new Transcoder
{
VideoFiles = new[] { new SourceReaderExtra(videoFileName, null) },
DestinationFile = Path.ChangeExtension(videoFileName, "wmv"),
VideoBitRate = 5000000
};
var errorMessage = transcoder.TestVideoConversion();
return(new VideoDetails(
supportedAudioBitRates.ToArray(),
videoStream.NativeMediaType.FrameRate.ToInt(),
videoStream.NativeMediaType.FrameSize,
videoBitRate / 1000000,
audioSamplesPerSecond,
audioAverageBytesPerSecond,
videoSubTypeName,
audioSubTypeName,
transcoder,
errorMessage));
}
}
