diff --git a/main.py b/main.py
index a6dd895..6096121 100644
--- a/main.py
+++ b/main.py
@@ -1738,38 +1738,35 @@ def start_record(url_data: tuple, count_variable: int = -1) -> None:
                                     )
                                     ffmpeg_command = [
                                         "ffmpeg", "-y", "-loglevel", "info", "-nostdin", "-re",
-                                        "-stats",                    # 加这行：强制每帧打印统计（frame= fps= bitrate=）
-                                        "-stats_period", "1",        # 加这行：每 1 秒强制打印一次进度
-                                        "-fflags", "+genpts",        # 加这行：强制生成时间戳，日志更快出
+                                        "-stats", "-stats_period", "1", "-fflags", "+genpts",
                                         "-rw_timeout", "30000000",
                                         "-reconnect", "1", "-reconnect_at_eof", "1", "-reconnect_streamed", "1",
                                         "-reconnect_delay_max", "5",
                                         "-fflags", "+genpts+discardcorrupt+nobuffer+flush_packets",
                                         "-flags", "low_delay",
                                         "-err_detect", "ignore_err",
-                                        "-max_delay", "80000",                 # 0.08s 缓冲，speed 必爆
-                                        "-thread_queue_size", "2048",          # 最小队列，dup 近 0
+                                        "-max_delay", "80000",
+                                        "-thread_queue_size", "2048",
 
                                         "-headers", douyin_headers,
                                         "-i", real_url,
 
-                                        # 真 1080p 竖屏（左右各 36px 黑边，几乎无感）
                                         "-vf", "scale=1080:1920:force_original_aspect_ratio=decrease:flags=lanczos,pad=1080:1920:(ow-iw)/2:(oh-ih)/2:black",
 
                                         "-c:v", "libx264",
-                                        "-preset", "superfast",                # 4.5Mbps 最优 preset
+                                        "-preset", "superfast",
                                         "-tune", "zerolatency",
                                         "-profile:v", "high",
-                                        "-b:v", "3600k", "-maxrate", "3600k", "-bufsize", "5400k",   # 1.5× 超保守 CBR
+                                        "-b:v", "4200k", "-maxrate", "4200k", "-bufsize", "8400k",   # 改1：2× bufsize，真 CBR
                                         "-g", "60", "-keyint_min", "50",
                                         "-r", "30",
                                         "-bf", "0",
                                         "-sc_threshold", "0",
-                                        "-nal-hrd", "cbr",
-                                        "-x264-params", "vbv-maxrate=3600:vbv-bufsize=5400:nal-hrd=cbr:force-cfr=1:scenecut=0",
+                                        "-nal-hrd", "cbr",                                          # 改2：强制 CBR
+                                        "-x264-params", "nal-hrd=cbr:force-cfr=1:scenecut=0",       # 改3：简化 params，锁死 CBR
                                         "-pix_fmt", "yuv420p",
 
-                                        "-c:a", "aac", "-b:a", "96k", "-ar", "44100", "-ac", "2",
+                                        "-c:a", "aac", "-b:a", "128k", "-ar", "44100", "-ac", "2",  # 改4：音频上 128k（YouTube 推荐）
                                         "-af", "aresample=async=1:first_pts=0",
 
                                         "-flags", "+global_header",