diff --git a/src/include/switch_module_interfaces.h b/src/include/switch_module_interfaces.h
index 1d57abe540..1802f872e3 100644
--- a/src/include/switch_module_interfaces.h
+++ b/src/include/switch_module_interfaces.h
@@ -321,6 +321,7 @@ typedef struct switch_mm_s {
 	int vb;
 	int vw;
 	int vh;
+	int cbr;
 	float fps;
 	float source_fps;
 	int vbuf;
diff --git a/src/mod/applications/mod_av/avformat.c b/src/mod/applications/mod_av/avformat.c
index 7546ad6391..264dd33e15 100644
--- a/src/mod/applications/mod_av/avformat.c
+++ b/src/mod/applications/mod_av/avformat.c
@@ -353,7 +353,7 @@ static switch_status_t add_stream(MediaStream *mst, AVFormatContext *fc, AVCodec
 		/* Resolution must be a multiple of two. */
 		c->width    = mst->width;
 		c->height   = mst->height;
-		c->bit_rate = switch_calc_bitrate(c->width, c->height, 2, fps) * 1024;
+		c->bit_rate = mm->vb;
 		mst->st->time_base.den = 1000;
 		mst->st->time_base.num = 1;
 		c->time_base.den = 1000;
@@ -409,15 +409,22 @@ static switch_status_t add_stream(MediaStream *mst, AVFormatContext *fc, AVCodec
 			}
 		}
 
-		c->gop_size = 250;  // g=250
-		c->keyint_min = 25; // keyint_min=25
-		c->i_quant_factor = 0.71; // i_qfactor=0.71
-		c->qcompress = 0.6; // qcomp=0.6
-		c->qmin = 10;   // qmin=10
-		c->qmax = 31;   // qmax=31
-		c->max_qdiff = 4;   // qdiff=4
-		av_opt_set_int(c->priv_data, "crf", 18, 0);
 
+		if (mm->cbr) {
+			c->rc_min_rate = c->bit_rate;
+			c->rc_max_rate = c->bit_rate;
+			c->rc_buffer_size = c->bit_rate;
+			c->qcompress = 0;
+		} else {
+			c->gop_size = 250;  // g=250
+			c->keyint_min = 25; // keyint_min=25
+			c->i_quant_factor = 0.71; // i_qfactor=0.71
+			c->qcompress = 0.6; // qcomp=0.6
+			c->qmin = 10;   // qmin=10
+			c->qmax = 31;   // qmax=31
+			c->max_qdiff = 4;   // qdiff=4
+			av_opt_set_int(c->priv_data, "crf", 18, 0);
+		}
 
 		if (codec_id == AV_CODEC_ID_VP8) {
 			av_set_options_string(c, "quality=realtime", "=", ":");
@@ -1753,7 +1760,9 @@ static switch_status_t av_file_open(switch_file_handle_t *handle, const char *pa
 		handle->mm.ab = 128;
 	}
 
-	handle->mm.vb = switch_calc_bitrate(handle->mm.vw, handle->mm.vh, 1, handle->mm.fps);
+	if (!handle->mm.vb) {
+		handle->mm.vb = switch_calc_bitrate(handle->mm.vw, handle->mm.vh, 1, handle->mm.fps);
+	}
 
 	if (fmt->video_codec != AV_CODEC_ID_NONE) {
 		const AVCodecDescriptor *desc;
diff --git a/src/switch_core_file.c b/src/switch_core_file.c
index ce75674572..49ff70b7d1 100644
--- a/src/switch_core_file.c
+++ b/src/switch_core_file.c
@@ -142,6 +142,10 @@ SWITCH_DECLARE(switch_status_t) switch_core_perform_file_open(const char *file,
 			}
 		}
 
+		if ((val = switch_event_get_header(fh->params, "cbr"))) {
+			tmp = switch_true(val);
+			fh->mm.cbr = tmp;
+		}
 
 		if ((val = switch_event_get_header(fh->params, "vb"))) {
 			tmp = atoi(val);