/// <summary>
/// Convert a video do a different format.
/// </summary>
/// <param name="source">Input video source.</param>
/// <param name="output">Output information.</param>
/// <param name="type">Target conversion video type.</param>
/// <param name="speed">Conversion target speed/quality (faster speed = lower quality).</param>
/// <param name="size">Video size.</param>
/// <param name="audioQuality">Conversion target audio quality.</param>
/// <param name="multithreaded">Is encoding multithreaded.</param>
/// <returns>Output video information.</returns>
public static bool Convert(
IMediaAnalysis source,
string output,
ContainerFormat format,
Speed speed = Speed.SuperFast,
VideoSize size = VideoSize.Original,
AudioQuality audioQuality = AudioQuality.Normal,
bool multithreaded = false)
{
FFMpegHelper.ExtensionExceptionCheck(output, format.Extension);
FFMpegHelper.ConversionSizeExceptionCheck(source);
var scale = VideoSize.Original == size ? 1 : (double)source.PrimaryVideoStream.Height / (int)size;
var outputSize = new Size((int)(source.PrimaryVideoStream.Width / scale), (int)(source.PrimaryVideoStream.Height / scale));
if (outputSize.Width % 2 != 0)
{
outputSize.Width += 1;
}
return(format.Name switch
{
"mp4" => FFMpegArguments
.FromInputFiles(true, source.Path)
.UsingMultithreading(multithreaded)
.WithVideoCodec(VideoCodec.LibX264)
.WithVideoBitrate(2400)
.Scale(outputSize)
.WithSpeedPreset(speed)
.WithAudioCodec(AudioCodec.Aac)
.WithAudioBitrate(audioQuality)
.OutputToFile(output)
.ProcessSynchronously(),
"ogv" => FFMpegArguments
.FromInputFiles(true, source.Path)
.UsingMultithreading(multithreaded)
.WithVideoCodec(VideoCodec.LibTheora)
.WithVideoBitrate(2400)
.Scale(outputSize)
.WithSpeedPreset(speed)
.WithAudioCodec(AudioCodec.LibVorbis)
.WithAudioBitrate(audioQuality)
.OutputToFile(output)
.ProcessSynchronously(),
"mpegts" => FFMpegArguments
.FromInputFiles(true, source.Path)
.CopyChannel()
.WithBitStreamFilter(Channel.Video, Filter.H264_Mp4ToAnnexB)
.ForceFormat(VideoType.Ts)
.OutputToFile(output)
.ProcessSynchronously(),
"webm" => FFMpegArguments
.FromInputFiles(true, source.Path)
.UsingMultithreading(multithreaded)
.WithVideoCodec(VideoCodec.LibVpx)
.WithVideoBitrate(2400)
.Scale(outputSize)
.WithSpeedPreset(speed)
.WithAudioCodec(AudioCodec.LibVorbis)
.WithAudioBitrate(audioQuality)
.OutputToFile(output)
.ProcessSynchronously(),
_ => throw new ArgumentOutOfRangeException(nameof(format))
});
/// <summary>
/// Convert a video do a different format.
/// </summary>
/// <param name="source">Input video source.</param>
/// <param name="output">Output information.</param>
/// <param name="type">Target conversion video type.</param>
/// <param name="speed">Conversion target speed/quality (faster speed = lower quality).</param>
/// <param name="size">Video size.</param>
/// <param name="audioQuality">Conversion target audio quality.</param>
/// <param name="multithreaded">Is encoding multithreaded.</param>
/// <returns>Output video information.</returns>
public VideoInfo Convert(
VideoInfo source,
FileInfo output,
VideoType type = VideoType.Mp4,
Speed speed =
Speed.SuperFast,
VideoSize size =
VideoSize.Original,
AudioQuality audioQuality = AudioQuality.Normal,
bool multithreaded = false)
{
FFMpegHelper.ConversionExceptionCheck(source.ToFileInfo(), output);
FFMpegHelper.ExtensionExceptionCheck(output, FileExtension.ForType(type));
FFMpegHelper.ConversionSizeExceptionCheck(source);
_totalTime = source.Duration;
var scale = VideoSize.Original == size ? 1 :
(double)source.Height / (int)size;
var outputSize = new Size(
(int)(source.Width / scale),
(int)(source.Height / scale)
);
if (outputSize.Width % 2 != 0)
{
outputSize.Width += 1;
}
var container = new ArgumentContainer();
switch (type)
{
case VideoType.Mp4:
container.Add(
new InputArgument(source),
new ThreadsArgument(multithreaded),
new ScaleArgument(outputSize),
new VideoCodecArgument(VideoCodec.LibX264, 15000),
new SpeedArgument(speed),
new AudioCodecArgument(AudioCodec.Aac),
new OverrideArgument(),
new OutputArgument(output)
);
break;
case VideoType.Ogv:
container.Add(
new InputArgument(source),
new ThreadsArgument(multithreaded),
new ScaleArgument(outputSize),
new VideoCodecArgument(VideoCodec.LibTheora, 2400),
new SpeedArgument(speed),
new AudioCodecArgument(AudioCodec.LibVorbis, audioQuality),
new OutputArgument(output)
);
break;
case VideoType.Ts:
container.Add(
new InputArgument(source),
new CopyArgument(),
new BitStreamFilterArgument(Channel.Video, Filter.H264_Mp4ToAnnexB),
new ForceFormatArgument(VideoCodec.MpegTs),
new OutputArgument(output)
);
break;
}
if (!RunProcess(container, output))
{
throw new FFMpegException(FFMpegExceptionType.Conversion, $"The video could not be converted to {Enum.GetName(typeof(VideoType), type)}");
}
_totalTime = TimeSpan.MinValue;
return(new VideoInfo(output));
}
