/// <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 async Task <bool> SnapshotAsync(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 = await FFProbe.AnalyseAsync(input);
var(arguments, outputOptions) = BuildSnapshotArguments(input, source, size, captureTime, streamIndex, inputFileIndex);
return(await arguments
.OutputToFile(output, true, outputOptions)
.ProcessAsynchronously());
}
/// <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 async Task <Bitmap> SnapshotAsync(string input, Size?size = null, TimeSpan?captureTime = null, int?streamIndex = null, int inputFileIndex = 0)
{
var source = await FFProbe.AnalyseAsync(input);
var(arguments, outputOptions) = BuildSnapshotArguments(input, source, size, captureTime, streamIndex, inputFileIndex);
using var ms = new MemoryStream();
await arguments
.OutputToPipe(new StreamPipeSink(ms), options => outputOptions(options
.ForceFormat("rawvideo")))
.ProcessAsynchronously();
ms.Position = 0;
return(new Bitmap(ms));
}