91 lines
2.8 KiB
C#
91 lines
2.8 KiB
C#
using ExifLibrary;
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using FFMpegCore;
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namespace VoidCat.Services.Files;
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/// <summary>
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/// Service which utilizes ffmpeg to strip metadata from media
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/// and compress media to reduce storage costs
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/// </summary>
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public class CompressContent
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{
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private readonly ILogger<CompressContent> _logger;
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public CompressContent(ILogger<CompressContent> logger)
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{
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_logger = logger;
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}
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public async Task<CompressResult> TryCompressMedia(string input, string output, CancellationToken cts)
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{
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try
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{
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string? outMime = null;
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var inExt = Path.GetExtension(input).ToLower();
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var isImage = false;
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switch (inExt)
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{
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case ".jpg":
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case ".jpeg":
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case ".gif":
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case ".png":
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case ".bmp":
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case ".tiff":
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{
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output = Path.ChangeExtension(output, ".webp");
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outMime = "image/webp";
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isImage = true;
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break;
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}
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}
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var probe = isImage ? await ImageFile.FromFileAsync(input) : default;
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var ffmpeg = FFMpegArguments
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.FromFileInput(input)
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.OutputToFile(output, true, o =>
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{
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o.WithoutMetadata();
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if (inExt == ".gif")
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{
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o.Loop(0);
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}
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if (probe != default)
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{
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var orientation = probe.Properties.Get<ExifEnumProperty<Orientation>>(ExifTag.Orientation);
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if (orientation != default && orientation.Value != Orientation.Normal)
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{
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if (orientation.Value == Orientation.RotatedRight)
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{
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o.WithCustomArgument("-metadata:s:v rotate=\"90\"");
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}
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else if (orientation.Value == Orientation.RotatedLeft)
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{
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o.WithCustomArgument("-metadata:s:v rotate=\"-90\"");
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}
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}
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}
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})
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.CancellableThrough(cts);
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_logger.LogInformation("Running: {command}", ffmpeg.Arguments);
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var result = await ffmpeg.ProcessAsynchronously();
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return new(result, output)
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{
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MimeType = outMime
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};
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, "Could not strip metadata");
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}
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return new(false, output);
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}
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public record CompressResult(bool Success, string OutPath)
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{
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public string? MimeType { get; init; }
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}
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}
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