private static (FFMpegArguments, Action <FFMpegArgumentOptions> outputOptions) BuildSnapshotArguments(IMediaAnalysis source, Size?size = null, TimeSpan?captureTime = null)
{
captureTime ??= TimeSpan.FromSeconds(source.Duration.TotalSeconds / 3);
size = PrepareSnapshotSize(source, size);
return(FFMpegArguments
.FromFileInput(source, options => options
.Seek(captureTime)),
options => options
.WithVideoCodec(VideoCodec.Png)
.WithFrameOutputCount(1)
.Resize(size));
}
private static (FFMpegArguments, Action <FFMpegArgumentOptions> outputOptions) BuildSnapshotArguments(
string input,
IMediaAnalysis source,
Size?size = null,
TimeSpan?captureTime = null,
int?streamIndex = null,
int inputFileIndex = 0)
{
captureTime ??= TimeSpan.FromSeconds(source.Duration.TotalSeconds / 3);
size = PrepareSnapshotSize(source, size);
streamIndex = streamIndex == null ? 0 : source.VideoStreams.FirstOrDefault(videoStream => videoStream.Index == streamIndex).Index;
return(FFMpegArguments
.FromFileInput(input, false, options => options
.Seek(captureTime)),
options => options
.SelectStream((int)streamIndex, inputFileIndex)
.WithVideoCodec(VideoCodec.Png)
.WithFrameOutputCount(1)
.Resize(size));
}
/// <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(
string input,
string output,
ContainerFormat format,
Speed speed = Speed.SuperFast,
VideoSize size = VideoSize.Original,
AudioQuality audioQuality = AudioQuality.Normal,
bool multithreaded = false)
{
FFMpegHelper.ExtensionExceptionCheck(output, format.Extension);
var source = FFProbe.Analyse(input);
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
.FromFileInput(input)
.OutputToFile(output, true, options => options
.UsingMultithreading(multithreaded)
.WithVideoCodec(VideoCodec.LibX264)
.WithVideoBitrate(2400)
.WithVideoFilters(filterOptions => filterOptions
.Scale(outputSize))
.WithSpeedPreset(speed)
.WithAudioCodec(AudioCodec.Aac)
.WithAudioBitrate(audioQuality))
.ProcessSynchronously(),
"ogv" => FFMpegArguments
.FromFileInput(input)
.OutputToFile(output, true, options => options
.UsingMultithreading(multithreaded)
.WithVideoCodec(VideoCodec.LibTheora)
.WithVideoBitrate(2400)
.WithVideoFilters(filterOptions => filterOptions
.Scale(outputSize))
.WithSpeedPreset(speed)
.WithAudioCodec(AudioCodec.LibVorbis)
.WithAudioBitrate(audioQuality))
.ProcessSynchronously(),
"mpegts" => FFMpegArguments
.FromFileInput(input)
.OutputToFile(output, true, options => options
.CopyChannel()
.WithBitStreamFilter(Channel.Video, Filter.H264_Mp4ToAnnexB)
.ForceFormat(VideoType.Ts))
.ProcessSynchronously(),
"webm" => FFMpegArguments
.FromFileInput(input)
.OutputToFile(output, true, options => options
.UsingMultithreading(multithreaded)
.WithVideoCodec(VideoCodec.LibVpx)
.WithVideoBitrate(2400)
.WithVideoFilters(filterOptions => filterOptions
.Scale(outputSize))
.WithSpeedPreset(speed)
.WithAudioCodec(AudioCodec.LibVorbis)
.WithAudioBitrate(audioQuality))
.ProcessSynchronously(),
_ => throw new ArgumentOutOfRangeException(nameof(format))
});