Add encoding frame rate limit

src/config.cpp

@@ -417,6 +417,7 @@ namespace config {
 
   video_t video {
     false, // headless_mode
+    true, // limit_framerate
     28,  // qp
 
     0,  // hevc_mode
@@ -1089,6 +1090,7 @@ namespace config {
     }
 
     bool_f(vars, "headless_mode", video.headless_mode);
+    bool_f(vars, "limit_framerate", video.limit_framerate);
     int_f(vars, "qp", video.qp);
     int_between_f(vars, "hevc_mode", video.hevc_mode, { 0, 3 });
     int_between_f(vars, "av1_mode", video.av1_mode, { 0, 3 });

src/config.h

@@ -16,6 +16,7 @@
 namespace config {
   struct video_t {
     bool headless_mode;
+    bool limit_framerate;
     // ffmpeg params
     int qp;  // higher == more compression and less quality