diff --git a/vp9/encoder/vp9_ratectrl.c b/vp9/encoder/vp9_ratectrl.c
index bc2c3a69a..7aa4b39ed 100644
--- a/vp9/encoder/vp9_ratectrl.c
+++ b/vp9/encoder/vp9_ratectrl.c
@@ -500,9 +500,9 @@ static int calc_active_worst_quality_one_pass_cbr(const VP9_COMP *cpi) {
   const VP9_CONFIG *oxcf = &cpi->oxcf;
   const RATE_CONTROL *rc = &cpi->rc;
   // Buffer level below which we push active_worst to worst_quality.
-  int critical_level = oxcf->optimal_buffer_level >> 2;
+  int64_t critical_level = oxcf->optimal_buffer_level >> 2;
+  int64_t buff_lvl_step = 0;
   int adjustment = 0;
-  int buff_lvl_step = 0;
   int active_worst_quality;
   if (cpi->common.frame_type == KEY_FRAME)
     return rc->worst_quality;
@@ -517,8 +517,8 @@ static int calc_active_worst_quality_one_pass_cbr(const VP9_COMP *cpi) {
     // Maximum limit for down adjustment, ~30%.
     int max_adjustment_down = active_worst_quality / 3;
     if (max_adjustment_down) {
-      buff_lvl_step = (int)((oxcf->maximum_buffer_size -
-          oxcf->optimal_buffer_level) / max_adjustment_down);
+      buff_lvl_step = ((oxcf->maximum_buffer_size -
+                        oxcf->optimal_buffer_level) / max_adjustment_down);
       if (buff_lvl_step)
         adjustment = (int)((rc->buffer_level - oxcf->optimal_buffer_level) /
                             buff_lvl_step);
@@ -529,9 +529,10 @@ static int calc_active_worst_quality_one_pass_cbr(const VP9_COMP *cpi) {
     if (critical_level) {
       buff_lvl_step = (oxcf->optimal_buffer_level - critical_level);
       if (buff_lvl_step) {
-        adjustment = (rc->worst_quality - rc->avg_frame_qindex[INTER_FRAME]) *
-                         (oxcf->optimal_buffer_level - rc->buffer_level) /
-                             buff_lvl_step;
+        adjustment =
+            (int)((rc->worst_quality - rc->avg_frame_qindex[INTER_FRAME]) *
+                  (oxcf->optimal_buffer_level - rc->buffer_level) /
+                  buff_lvl_step);
       }
       active_worst_quality = rc->avg_frame_qindex[INTER_FRAME] + adjustment;
     }
@@ -1150,7 +1151,7 @@ void vp9_rc_postencode_update(VP9_COMP *cpi, uint64_t bytes_used) {
 
   cm->last_frame_type = cm->frame_type;
   // Update rate control heuristics
-  rc->projected_frame_size = (bytes_used << 3);
+  rc->projected_frame_size = (int)(bytes_used << 3);
 
   // Post encode loop adjustment of Q prediction.
   vp9_rc_update_rate_correction_factors(
@@ -1309,7 +1310,7 @@ static int calc_pframe_target_size_one_pass_cbr(const VP9_COMP *cpi) {
   const VP9_CONFIG *oxcf = &cpi->oxcf;
   const RATE_CONTROL *rc = &cpi->rc;
   const int64_t diff = oxcf->optimal_buffer_level - rc->buffer_level;
-  const int one_pct_bits = 1 + oxcf->optimal_buffer_level / 100;
+  const int64_t one_pct_bits = 1 + oxcf->optimal_buffer_level / 100;
   int min_frame_target = MAX(rc->av_per_frame_bandwidth >> 4,
                              FRAME_OVERHEAD_BITS);
   int target = rc->av_per_frame_bandwidth;
@@ -1325,11 +1326,11 @@ static int calc_pframe_target_size_one_pass_cbr(const VP9_COMP *cpi) {
   }
   if (diff > 0) {
     // Lower the target bandwidth for this frame.
-    const int pct_low = MIN(diff / one_pct_bits, oxcf->under_shoot_pct);
+    const int pct_low = (int)MIN(diff / one_pct_bits, oxcf->under_shoot_pct);
     target -= (target * pct_low) / 200;
   } else if (diff < 0) {
     // Increase the target bandwidth for this frame.
-    const int pct_high = MIN(-diff / one_pct_bits, oxcf->over_shoot_pct);
+    const int pct_high = (int)MIN(-diff / one_pct_bits, oxcf->over_shoot_pct);
     target += (target * pct_high) / 200;
   }
   return MAX(min_frame_target, target);
@@ -1339,7 +1340,8 @@ static int calc_iframe_target_size_one_pass_cbr(const VP9_COMP *cpi) {
   const RATE_CONTROL *rc = &cpi->rc;
 
   if (cpi->common.current_video_frame == 0) {
-    return cpi->oxcf.starting_buffer_level / 2;
+    return ((cpi->oxcf.starting_buffer_level / 2) > INT_MAX)
+      ? INT_MAX : (int)(cpi->oxcf.starting_buffer_level / 2);
   } else {
     const int initial_boost = 32;
     int kf_boost = MAX(initial_boost, (int)(2 * cpi->output_framerate - 16));
diff --git a/vp9/encoder/vp9_ratectrl.h b/vp9/encoder/vp9_ratectrl.h
index cdd2f11be..5dbc7d138 100644
--- a/vp9/encoder/vp9_ratectrl.h
+++ b/vp9/encoder/vp9_ratectrl.h
@@ -57,8 +57,8 @@ typedef struct {
   double tot_q;
   double avg_q;
 
-  int buffer_level;
-  int bits_off_target;
+  int64_t buffer_level;
+  int64_t bits_off_target;
 
   int decimation_factor;
   int decimation_count;