diff --git a/main.py b/main.py
index 21411b1..5c991cc 100644
--- a/main.py
+++ b/main.py
@@ -1688,13 +1688,12 @@ def start_record(url_data: tuple, count_variable: int = -1) -> None:
 
                                     MAX_RETRY_DELAY = 90
                                     INITIAL_RETRY_DELAY = 3
-                                    NO_FRAME_TIMEOUT = 120
-                                    START_CHECK_AFTER = 25  
-                                    STALE_OUTPUT_SECONDS = 40 
-
                                     STDERR_QUEUE_TIMEOUT = 1.0
 
 
+                                    NO_FRAME_TIMEOUT = 120
+                                    START_CHECK_AFTER = 25  
+                                    STALE_OUTPUT_SECONDS = 40 
 
 
                                     END_KEYWORDS = [
@@ -1737,22 +1736,41 @@ def start_record(url_data: tuple, count_variable: int = -1) -> None:
                                         "Origin: https://live.douyin.com\r\n"
                                     )
                                     ffmpeg_command = [
-                                          "ffmpeg", "-loglevel", "info",
-                                        "-rw_timeout", "15000000",
+                                        "ffmpeg", "-y", "-loglevel", "info", "-nostdin", "-re",
+                                        "-rw_timeout", "30000000",
                                         "-reconnect", "1", "-reconnect_at_eof", "1", "-reconnect_streamed", "1",
-                                        "-reconnect_delay_max", "15",
-                                        "-fflags", "+genpts+discardcorrupt",
+                                        "-reconnect_delay_max", "5",
+
+                                        "-fflags", "+genpts+discardcorrupt+nobuffer+flush_packets",
+                                        "-flags", "low_delay",
                                         "-err_detect", "ignore_err",
-                                        "-thread_queue_size", "8192",
+                                        "-max_delay", "80000",                 # 0.08s 缓冲，speed 必爆
+                                        "-thread_queue_size", "2048",          # 最小队列，dup 近 0
+
                                         "-headers", douyin_headers,
                                         "-i", real_url,
-                                        "-vf", "scale=720:1280:force_original_aspect_ratio=decrease,pad=720:1280:(ow-iw)/2:(oh-ih)/2:black",
-                                        "-c:v", codec_v, "-preset", preset_v, *tune_param,
-                                        "-b:v", "2500k", "-maxrate", "2500k", "-bufsize", "5000k",
-                                        "-g", "50", "-r", "25", "-pix_fmt", "yuv420p",
-                                        "-c:a", "aac", "-b:a", "128k", "-ar", "44100", "-ac", "2",
+
+                                        # 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
+                                        "-tune", "zerolatency",
+                                        "-profile:v", "high",
+                                        "-b:v", "3600k", "-maxrate", "3600k", "-bufsize", "5400k",   # 1.5× 超保守 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",
+                                        "-pix_fmt", "yuv420p",
+
+                                        "-c:a", "aac", "-b:a", "96k", "-ar", "44100", "-ac", "2",
                                         "-af", "aresample=async=1:first_pts=0",
+
                                         "-flags", "+global_header",
+                                        "-flvflags", "no_duration_filesize",
                                         "-f", "flv", youtube_rtmp
                                     ]