obs-ffmpeg: Fix bitrate being set on NVENC CQP/lossless

plugins/obs-ffmpeg/jim-nvenc.c

@@ -409,8 +409,6 @@ static bool init_encoder(struct nvenc_data *enc, obs_data_t *settings)
 	params->encodeConfig = &enc->config;
 	params->maxEncodeWidth = voi->width;
 	params->maxEncodeHeight = voi->height;
-	config->rcParams.averageBitRate = bitrate * 1000;
-	config->rcParams.maxBitRate = vbr ? max_bitrate * 1000 : bitrate * 1000;
 	config->gopLength = gop_size;
 	config->frameIntervalP = 1 + bf;
 	h264_config->idrPeriod = gop_size;
@@ -455,6 +453,9 @@ static bool init_encoder(struct nvenc_data *enc, obs_data_t *settings)
 		config->rcParams.constQP.qpIntra = cqp;
 		enc->can_change_bitrate = false;
 
+		bitrate = 0;
+		max_bitrate = 0;
+
 	} else if (astrcmpi(rc, "vbr") != 0) { /* CBR by default */
 		h264_config->outputBufferingPeriodSEI = 1;
 		h264_config->outputPictureTimingSEI = 1;
@@ -463,6 +464,9 @@ static bool init_encoder(struct nvenc_data *enc, obs_data_t *settings)
 			: NV_ENC_PARAMS_RC_CBR;
 	}
 
+	config->rcParams.averageBitRate = bitrate * 1000;
+	config->rcParams.maxBitRate = vbr ? max_bitrate * 1000 : bitrate * 1000;
+
 	/* -------------------------- */
 	/* profile                    */