fix(video): base min frame time strictly on client framerate (#3844)

src/config.cpp

@@ -504,7 +504,6 @@ namespace config {
       {}  // wa
     },  // display_device
 
-    1,  // min_fps_factor
     0  // max_bitrate
   };
 
@@ -1143,7 +1142,6 @@ namespace config {
       video.dd.wa.hdr_toggle_delay = std::chrono::milliseconds {value};
     }
 
-    int_between_f(vars, "min_fps_factor", video.min_fps_factor, {1, 3});
     int_f(vars, "max_bitrate", video.max_bitrate);
 
     path_f(vars, "pkey", nvhttp.pkey);

src/config.h

@@ -140,7 +140,6 @@ namespace config {
       workarounds_t wa;
     } dd;
 
-    int min_fps_factor;  // Minimum fps target, determines minimum frame time
     int max_bitrate;  // Maximum bitrate, sets ceiling in kbps for bitrate requested from client
   };
 

src/video.cpp

@@ -1875,9 +1875,9 @@ namespace video {
       }
     });
 
-    // set minimum frame time, avoiding violation of client-requested target framerate
-    auto minimum_frame_time = std::chrono::milliseconds(1000 / std::min(config.framerate, (config::video.min_fps_factor * 10)));
-    BOOST_LOG(debug) << "Minimum frame time set to "sv << minimum_frame_time.count() << "ms, based on min fps factor of "sv << config::video.min_fps_factor << "."sv;
+    // set minimum frame time based on client-requested target framerate
+    std::chrono::duration<double, std::milli> minimum_frame_time {1000.0 / config.framerate};
+    BOOST_LOG(info) << "Minimum frame time set to "sv << minimum_frame_time.count() << "ms, based on client-requested target framerate "sv << config.framerate << "."sv;
 
     auto shutdown_event = mail->event<bool>(mail::shutdown);
     auto packets = mail::man->queue<packet_t>(mail::video_packets);