gramps
a9eb360288
Encoder dual-output: StreamEnabled/RecordEnabled/RecordPath options; per-output ffmpeg block (stream ->flv, record ->mp4); throw unless at least one output. RecordingFile: auto-name ty-<yyyymmdd>-<start hhmm>-0000.mp4, rename-on-stop to ty-...-<len hhmmss>.mp4 with numeric-suffix on collision. LayoutStore persists record folder. MainViewModel: REC/ON-AIR pills, status light, single Start<->End button (replaces Start/Stop variants), StopStream no longer signs out, explicit session timer. About overlay widened. Sign In label + spacing before Start. Tests: 244 passed / 246 (2 pre-existing: AudioPipeline gains-mute, RoundClip). Build 0 warnings. Scope check clean. Memory-map correction (derived-solution rule, 2026-08-29): image-shrink recipe was never recorded when first done, so it was re-derived. Added Derived-solution/recipes rule to AGENTS.md; MyMistakes.md now a permanent recipes registry (records the verified WPF-imaging shrink recipe); schema.md rows MyMistakes as registry; ai.md points to the rule. README hero image replaced: 3.2MB screenshot -> 1400x794 -> 188KB docs/ytLlive-preview.jpg (JPEG q82).
62 lines
2.6 KiB
C#
62 lines
2.6 KiB
C#
namespace ytLive.Services.Encoder;
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/// <summary>
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/// Builds the FFmpeg command line for a live RTMP push (TASK 4 ship step 3):
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/// raw BGRA frames via stdin (paced <c>-re</c>), real audio via the named pipe
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/// (TASK 9 — the mixer streams f32le at 48 kHz stereo into <c>\\.\pipe\<name></c>;
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/// WASAPI loopback + the mic ride the pipe instead of the old anullsrc silence),
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/// H.264 + AAC encoding, FLV muxing to the ingestion URL. Pure — the encoder
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/// just starts <c>ffmpeg.exe [Build(...)]</c>.
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/// </summary>
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public static class FfmpegArgs
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{
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public static IReadOnlyList<string> Build(EncoderOptions options, string videoEncoder)
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{
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var args = new List<string>
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{
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"-hide_banner", "-loglevel", "info",
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"-stats", "-stats_period", "0.5",
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"-re",
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"-f", "rawvideo", "-pix_fmt", "bgra",
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"-video_size", $"{options.Width}x{options.Height}",
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"-framerate", options.Fps.ToString(),
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"-i", "pipe:0",
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"-f", "f32le", "-ar", options.AudioSampleRate.ToString(),
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"-ac", options.AudioChannels.ToString(),
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"-i", $@"\\.\pipe\{options.AudioPipeName}",
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};
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// Each output is a self-contained block: its own -map, codec options,
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// format, and destination. Record+stream encodes the video twice off the
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// one raw input pipe (cheap on NVENC).
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if (options.StreamEnabled)
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{
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AddVideoTags(args, options, videoEncoder);
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args.AddRange(["-c:a", "aac", "-b:a", "128k",
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"-ar", options.AudioSampleRate.ToString(), "-ac", options.AudioChannels.ToString()]);
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args.AddRange(["-f", "flv", options.RtmpUrl]);
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}
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if (options.RecordEnabled)
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{
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AddVideoTags(args, options, videoEncoder);
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args.AddRange(["-c:a", "aac",
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"-ar", options.AudioSampleRate.ToString(), "-ac", options.AudioChannels.ToString()]);
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args.AddRange(["-f", "mp4", options.RecordPath!]);
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}
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return args;
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}
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private static void AddVideoTags(List<string> args, EncoderOptions options, string videoEncoder)
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{
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var gop = options.GopSize;
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args.AddRange(["-map", "0:v", "-map", "1:a"]);
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args.AddRange(["-c:v", videoEncoder]);
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args.AddRange(["-b:v", $"{options.BitrateKbps}k", "-maxrate", $"{options.BitrateKbps}k",
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"-bufsize", $"{options.BitrateKbps * 2}k"]);
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args.AddRange(["-g", gop.ToString(), "-keyint_min", gop.ToString(),
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"-sc_threshold", "0", "-bf", "0", "-pix_fmt", "yuv420p"]);
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}
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}
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