/// <summary>
/// Saves a 'png' thumbnail from the input video to drive
/// </summary>
/// <param name="input">Source video analysis</param>
/// <param name="output">Output video file path</param>
/// <param name="captureTime">Seek position where the thumbnail should be taken.</param>
/// <param name="size">Thumbnail size. If width or height equal 0, the other will be computed automatically.</param>
/// <param name="streamIndex">Selected video stream index.</param>
/// <param name="inputFileIndex">Input file index</param>
/// <returns>Bitmap with the requested snapshot.</returns>
public static bool Snapshot(string input, string output, Size?size = null, TimeSpan?captureTime = null, int?streamIndex = null, int inputFileIndex = 0)
{
if (Path.GetExtension(output) != FileExtension.Png)
{
output = Path.GetFileNameWithoutExtension(output) + FileExtension.Png;
}
var source = FFProbe.Analyse(input);
var(arguments, outputOptions) = BuildSnapshotArguments(input, source, size, captureTime, streamIndex, inputFileIndex);
return(arguments
.OutputToFile(output, true, outputOptions)
.ProcessSynchronously());
}
/// <summary>
/// Saves a 'png' thumbnail to an in-memory bitmap
/// </summary>
/// <param name="input">Source video file.</param>
/// <param name="captureTime">Seek position where the thumbnail should be taken.</param>
/// <param name="size">Thumbnail size. If width or height equal 0, the other will be computed automatically.</param>
/// <param name="streamIndex">Selected video stream index.</param>
/// <param name="inputFileIndex">Input file index</param>
/// <returns>Bitmap with the requested snapshot.</returns>
public static Bitmap Snapshot(string input, Size?size = null, TimeSpan?captureTime = null, int?streamIndex = null, int inputFileIndex = 0)
{
var source = FFProbe.Analyse(input);
var(arguments, outputOptions) = BuildSnapshotArguments(input, source, size, captureTime, streamIndex, inputFileIndex);
using var ms = new MemoryStream();
arguments
.OutputToPipe(new StreamPipeSink(ms), options => outputOptions(options
.ForceFormat("rawvideo")))
.ProcessSynchronously();
ms.Position = 0;
using var bitmap = new Bitmap(ms);
return(bitmap.Clone(new Rectangle(0, 0, bitmap.Width, bitmap.Height), bitmap.PixelFormat));
}
/// <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))
});