fix: resolve camera preview and export pipeline issues

Author: hidumou

apps/desktop/src-tauri/src/lib.rs

@@ -637,7 +637,17 @@ async fn set_camera_input(
     let camera_in_use = app.camera_in_use;
     drop(app);
 
+    let skip_camera_window = skip_camera_window.unwrap_or(false);
+
     if id == current_id && camera_in_use {
+        if !skip_camera_window && CapWindowId::Camera.get(&app_handle).is_none() {
+            let show_result = ShowCapWindow::Camera { centered: false }
+                .show(&app_handle)
+                .await;
+            show_result
+                .map_err(|err| error!("Failed to show camera preview window: {err}"))
+                .ok();
+        }
         return Ok(());
     }
 
@@ -717,7 +727,7 @@ async fn set_camera_input(
                 return Err(e);
             }
 
-            if !skip_camera_window.unwrap_or(false) {
+            if !skip_camera_window {
                 let show_result = ShowCapWindow::Camera { centered: false }
                     .show(&app_handle)
                     .await;

crates/enc-ffmpeg/src/base.rs

@@ -85,6 +85,12 @@ impl EncoderBase {
                 }
             }
 
+            if let (Some(pts), Some(dts)) = (self.packet.pts(), self.packet.dts())
+                && pts < dts
+            {
+                self.packet.set_pts(Some(dts));
+            }
+
             self.last_written_dts = self.packet.dts();
             self.packet.write_interleaved(output)?;
         }

crates/enc-ffmpeg/src/video/h264.rs

@@ -781,8 +781,9 @@ fn get_codec_and_options(
                             .map(|v| v.get())
                             .unwrap_or(4);
                         options.set("threads", &thread_count.to_string());
+                        options.set("bf", "0");
                         options.set("rc-lookahead", "10");
-                        options.set("b-adapt", "1");
+                        options.set("b-adapt", "0");
                         options.set("aq-mode", "1");
                         options.set("ref", "2");
                         options.set("subme", "2");