/// <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);
string args = "";
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;
}
switch (type)
{
case VideoType.Mp4:
args = ArgumentsStringifier.Input(source) +
ArgumentsStringifier.Threads(multithreaded) +
ArgumentsStringifier.Scale(outputSize) +
ArgumentsStringifier.Video(VideoCodec.LibX264, 2400) +
ArgumentsStringifier.Speed(speed) +
ArgumentsStringifier.Audio(AudioCodec.Aac, audioQuality) +
ArgumentsStringifier.Output(output);
break;
case VideoType.Ogv:
args = ArgumentsStringifier.Input(source) +
ArgumentsStringifier.Threads(multithreaded) +
ArgumentsStringifier.Scale(outputSize) +
ArgumentsStringifier.Video(VideoCodec.LibTheora, 2400) +
ArgumentsStringifier.Speed(16) +
ArgumentsStringifier.Audio(AudioCodec.LibVorbis, audioQuality) +
ArgumentsStringifier.Output(output);
break;
case VideoType.Ts:
args = ArgumentsStringifier.Input(source) +
ArgumentsStringifier.Copy() +
ArgumentsStringifier.BitStreamFilter(Channel.Video, Filter.H264_Mp4ToAnnexB) +
ArgumentsStringifier.ForceFormat(VideoCodec.MpegTs) +
ArgumentsStringifier.Output(output);
break;
}
if (!RunProcess(args, output))
{
throw new FFMpegException(FFMpegExceptionType.Conversion, $"The video could not be converted to {Enum.GetName(typeof(VideoType), type)}");
}
return(new VideoInfo(output));
}