[*] improve openh264 encoder efficiency

Author: heng30

lib/recorder/Cargo.toml

@@ -52,8 +52,8 @@ env_logger.workspace = true
 [features]
 default = ["wayland-wlr"]
 windows = ["openh264-video-encoder"]
-# wayland-wlr = ["dep:screen-capture-wayland-wlr", "x264-video-encoder"]
-wayland-wlr = ["dep:screen-capture-wayland-wlr", "openh264-video-encoder"]
+wayland-wlr = ["dep:screen-capture-wayland-wlr", "x264-video-encoder"]
+# wayland-wlr = ["dep:screen-capture-wayland-wlr", "openh264-video-encoder"] # For Debug on Linux
 wayland-portal = ["dep:screen-capture-wayland-portal", "x264-video-encoder"]
 
 x264-video-encoder = ["dep:x264"]

lib/recorder/src/video_encoder/README.md

@@ -0,0 +1,2 @@
+- `Linux` platform uses `x264` (~12ms)
+- `Windows` platform uses `openh264` (~25ms)

lib/recorder/src/video_encoder/ve_openh264.rs

@@ -25,11 +25,9 @@ impl OpenH264VideoEncoder {
         let encoder_config = EncoderConfig::new()
             .skip_frames(false)
             .profile(Profile::Baseline)
-            .complexity(Complexity::High)
-            .background_detection(false)
-            .adaptive_quantization(false)
-            .rate_control_mode(RateControlMode::Bufferbased)
-            .usage_type(UsageType::ScreenContentRealTime)
+            .complexity(Complexity::Low)
+            .rate_control_mode(RateControlMode::Quality)
+            .usage_type(UsageType::CameraVideoRealTime)
             .max_frame_rate(FrameRate::from_hz(config.fps.to_u32() as f32));
 
         let encoder = Encoder::with_api_config(OpenH264API::from_source(), encoder_config)