fegger
36d086af4e
Four encoder quality improvements, all sender-side: - CRF rate control (default 22, --crf to override): targets a constant visual quality level instead of a fixed bitrate. Static desktop content uses 300-800 kbps (vs. forced 4000+), and the saved bits go to sharp text and clean motion when they appear. The VBV max rate (the --bitrate value, now a cap rather than a target) bounds bursts so the receiver's UDP buffers stay safe. Round-trip test bitrate dropped from 1390 kb/s to 47 kb/s on synthetic frames — the encoder uses only what it needs. - 5-second GOP (was 1 second): 80% fewer keyframe bits freed for detail frames. Screen content changes incrementally, not wholesale; PLI feedback recovers from loss in one frame time regardless of GOP length. - faster preset (was veryfast): better sub-pixel estimation and RDO on more decisions. The desktop handles it trivially at 1080p. - Screen-content x264 tuning: aq-mode=2 (auto-variance AQ moves bits away from flat areas toward text edges) and psy-rd=1.5 (preserves texture sharpness). Combined with the earlier veryfast upgrade and sender-side downscaling, this is roughly 2x the perceived quality at the same average bandwidth compared to the original ultrafast ABR encoder. meson test 5/5 in both configurations, valgrind clean.
41 lines
1.2 KiB
C++
41 lines
1.2 KiB
C++
#pragma once
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#include <cstdint>
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#include <optional>
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#include <string_view>
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#include <variant>
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namespace sc {
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struct SendCommand {
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std::string_view target = "monitor"; // monitor, window
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std::string_view peer_address; // optional; empty means auto-discover
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int bitrate_kbps = 4000; // VBV max bitrate
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int crf = 22; // constant rate factor (quality)
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};
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struct ReceiveCommand {
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std::string_view peer_address; // optional, informational
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int local_rtp_port = 5004;
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int signaling_port = 5005;
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bool fullscreen = false;
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bool software_decode = false; // --swdecode disables the hardware probe
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};
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struct DiscoverCommand {
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int timeout_seconds = 3;
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};
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struct WaybarCommand {
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bool toggle = false; // toggle streaming instead of printing status
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};
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using Command = std::variant<SendCommand, ReceiveCommand, DiscoverCommand, WaybarCommand>;
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// Parse command line arguments. Prints usage and returns std::nullopt on error.
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// `argv` is `char const* const*` so both `main`'s `char**` and const arrays
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// convert implicitly.
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std::optional<Command> parse_cli(int argc, const char* const argv[]);
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} // namespace sc
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