gramps
6310f50c27
The frame pump now submits crop-sized BGRA frames; FFmpeg scales them to final tier dimensions. Bundled scaler benchmark: 300 608x1080 to 1080x1920 frames in 0.435s (scaler-only). Reference: https://ffmpeg.org/ffmpeg-filters.html#scale-1
56 lines
2.5 KiB
C#
56 lines
2.5 KiB
C#
namespace ytLive.Services.Encoder;
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/// <summary>
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/// Everything the FFmpeg subprocess encoder needs for one go-live (TASK 4 ship
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/// step 3). <see cref="RtmpUrl"/> is the FULL ingestion URL — the reusable
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/// stream's ingest address plus its stream key (<c>rtmp://a.rtmp.youtube.com/live2/<key></c>).
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/// Resolution/FPS/bitrate come from the active quality tier; audio (TASK 9)
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/// streams from the mixer through the named pipe <see cref="AudioPipeName"/>.
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/// </summary>
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public sealed class EncoderOptions
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{
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/// <summary>The audio pipe the mixer streams into; the args reference the
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/// same name for ffmpeg's <c>-i</c>.</summary>
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public const string DefaultAudioPipeName = "ytllive_audio";
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public string RtmpUrl { get; init; } = string.Empty;
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/// <summary>Final encoded output width and height.</summary>
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public int Width { get; init; } = 1920;
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public int Height { get; init; } = 1080;
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/// <summary>Raw BGRA frame size from the compositor. Zero uses the final output size.</summary>
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public int InputWidth { get; init; }
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public int InputHeight { get; init; }
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public int RawWidth => InputWidth > 0 ? InputWidth : Width;
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public int RawHeight => InputHeight > 0 ? InputHeight : Height;
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public int Fps { get; init; } = 60;
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public int BitrateKbps { get; init; } = 8000;
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/// <summary>Push to <see cref="RtmpUrl"/> (the ON-AIR side). Defaults on so
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/// the pre-recording callers behave unchanged; the VM sets it from the ON-AIR
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/// pill.</summary>
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public bool StreamEnabled { get; init; } = true;
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/// <summary>Write a local file at <see cref="RecordPath"/> (the REC side).
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/// False unless the REC pill is on.</summary>
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public bool RecordEnabled { get; init; }
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/// <summary>Local MP4 output path for recording. Required when
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/// <see cref="RecordEnabled"/> is true.</summary>
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public string? RecordPath { get; init; }
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/// <summary>H.264 encoder name for <c>-c:v</c>; the encoder probes and prefers
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/// nvenc → qsv → amf → libopenh264 when not forced.</summary>
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public string? VideoEncoder { get; init; }
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public int AudioSampleRate { get; init; } = 48000;
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public int AudioChannels { get; init; } = 2;
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/// <summary>Name of the mixer's audio pipe (default <see cref="DefaultAudioPipeName"/>).</summary>
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public string AudioPipeName { get; init; } = DefaultAudioPipeName;
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/// <summary>GOP in frames = Fps × 4s — the YouTube keyframe ≤ 4s compliance bound.</summary>
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public int GopSize => Fps * 4;
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}
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