diff --git a/Makefile b/Makefile
index 39cf485..c2ea417 100644
--- a/Makefile
+++ b/Makefile
@@ -4,6 +4,10 @@ CPPFLAGS ?= -Iinclude -Ithird_party/cjson -Ithird_party/kcp
 LDFLAGS ?= -pthread
 PYTHON ?= python3
 
+ifeq ($(QUIET_FFMPEG_LOGS),1)
+CFLAGS += -DQUIET_FFMPEG_LOGS
+endif
+
 BIN_DIR := bin
 SRC_DIR := src
 CMD_DIR := cmd
diff --git a/cmd/v1_camera_pipeline_ifdef.c b/cmd/v1_camera_pipeline_ifdef.c
index 0cd1ad7..a151dfc 100644
--- a/cmd/v1_camera_pipeline_ifdef.c
+++ b/cmd/v1_camera_pipeline_ifdef.c
@@ -268,7 +268,7 @@ AVCodecContext *create_mjpeg_decoder()
     AVCodecContext *ctx = avcodec_alloc_context3(decoder);
     ctx->width = WIDTH;
     ctx->height = HEIGHT;
-    ctx->pix_fmt = AV_PIX_FMT_YUVJ420P;  // 使用YUVJ420P
+    ctx->pix_fmt = AV_PIX_FMT_YUVJ420P;  // Use YUVJ420P for MJPEG compatibility.
     ctx->color_range = AVCOL_RANGE_JPEG; // JPEG范围
     ctx->thread_count = 1;
 
@@ -299,7 +299,7 @@ AVCodecContext *create_mjpeg_encoder()
     AVCodecContext *ctx = avcodec_alloc_context3(encoder);
     ctx->width = OUTPUT_WIDTH;
     ctx->height = OUTPUT_HEIGHT;
-    ctx->pix_fmt = AV_PIX_FMT_YUVJ420P; // 使用YUVJ420P
+    ctx->pix_fmt = AV_PIX_FMT_YUVJ420P; // Use YUVJ420P for MJPEG compatibility.
     ctx->time_base = (AVRational){1, 30};
     ctx->qmin = 8;
     ctx->qmax = 31;
@@ -432,6 +432,10 @@ int main()
 
     memset(&sender, 0, sizeof(sender));
 
+#ifdef QUIET_FFMPEG_LOGS
+    av_log_set_level(AV_LOG_ERROR);
+#endif
+
     PRINT_TIME("=== V4L2 Direct Capture + FFmpeg Processing ===\n");
 
     // 1. Open V4L2 device