feat(entity/ffmpeg.py): 添加grid4效果支持在ffmpeg.py中增加了对grid4效果的支持。该功能允许用户通过指定参数来创建一个四宫格视频布局，每个格子显示不同的视频片段，并且可以设置延迟时间以实现更丰富的视觉效果。具体改动包括：

- 解析`grid4`效果的参数，如果未提供则默认为1。
- 根据提供的或默认的分辨率分割视频流为四个部分。
-为每个分割后的视频流应用缩放和时间延迟处理。
- 创建黑色背景并使用overlay滤镜将处理后的视频流放置于正确的位置上，形成最终的四宫格布局。

.gitignore

@@ -32,3 +32,4 @@ target/
 venv/
 cython_debug/
 .env
+.serena

constant/__init__.py

@@ -6,4 +6,4 @@ SUPPORT_FEATURE = (
     'rclone_upload',
     'custom_re_encode',
 )
-SOFTWARE_VERSION = '0.0.5'
+SOFTWARE_VERSION = '0.0.6'

entity/ffmpeg.py

@@ -271,7 +271,7 @@ class FfmpegTask(object):
                     if param == '':
                         param = "1"
                     if param != "1":
-                        # 视频变速
+                        # 视频变速：使用fps实现，避免PTS冲突
                         effect_index += 1
                         filter_args.append(f"{video_output_str}setpts={param}*PTS[v_eff{effect_index}]")
                         video_output_str = f"[v_eff{effect_index}]"
@@ -280,29 +280,24 @@ class FfmpegTask(object):
                     if param == '':
                         continue
                     _split = param.split(",")
-                    if len(_split) < 3:
+                    if len(_split) < 2:
                         continue
                     try:
                         start_time = float(_split[0])
                         zoom_factor = float(_split[1])
-                        duration = float(_split[2])
                         if start_time < 0:
                             start_time = 0
-                        if duration < 0:
-                            duration = 0
                         if zoom_factor <= 0:
                             zoom_factor = 1
                     except (ValueError, IndexError):
                         start_time = 0
-                        duration = 0
                         zoom_factor = 1
                     if zoom_factor == 1:
                         continue
                     effect_index += 1
                     
-                    # 获取缩放中心点（从pos_json或使用默认中心）
-                    center_x = "iw/2"
-                    center_y = "ih/2"
+                    left_x = f"iw/(2*{zoom_factor})"
+                    top_y = f"ih/(2*{zoom_factor})"
                     pos_json_str = self.ext_data.get('posJson', '{}')
                     try:
                         pos_json = json.loads(pos_json_str) if pos_json_str != '{}' else {}
@@ -318,23 +313,14 @@ class FfmpegTask(object):
                                 center_x_ratio = (_f_x + _f_x2) / (2 * _v_w)
                                 center_y_ratio = (_f_y + _f_y2) / (2 * _v_h)
                                 # 转换为视频坐标系统
-                                center_x = f"iw*{center_x_ratio:.6f}"
-                                center_y = f"ih*{center_y_ratio:.6f}"
+                                left_x = f"iw*({center_x_ratio:.6f}-1/(2*{zoom_factor}))"
+                                top_y = f"ih*({center_y_ratio:.6f}-1/(2*{zoom_factor}))"
                     except Exception as e:
                         # 解析失败使用默认中心
                         pass
                     
-                    if duration == 0:
                     # 静态缩放（整个视频时长）
-                        x_expr = f"({center_x})-(ow*zoom)/2"
-                        y_expr = f"({center_y})-(oh*zoom)/2"
-                        filter_args.append(f"{video_output_str}trim=start={start_time},zoompan=z={zoom_factor}:x={x_expr}:y={y_expr}:d=1[v_eff{effect_index}]")
-                    else:
-                        # 动态缩放（指定时间段内）
-                        zoom_expr = f"if(between(t\\,{start_time}\\,{start_time + duration})\\,{zoom_factor}\\,1)"
-                        x_expr = f"({center_x})-(ow*zoom)/2"
-                        y_expr = f"({center_y})-(oh*zoom)/2"
-                        filter_args.append(f"{video_output_str}zoompan=z={zoom_expr}:x={x_expr}:y={y_expr}:d=1[v_eff{effect_index}]")
+                    filter_args.append(f"{video_output_str}scale={zoom_factor}*iw:{zoom_factor}*ih,crop=iw/{zoom_factor}:ih/{zoom_factor}:{left_x}:{top_y}[v_eff{effect_index}]")
                     video_output_str = f"[v_eff{effect_index}]"
                 elif effect.startswith("skip:"):
                     param = effect.split(":", 2)[1]
@@ -357,6 +343,51 @@ class FfmpegTask(object):
                         filter_args.append(f"{video_output_str}reverse[v_rev{effect_index}]")
                         filter_args.append(f"[v_rev{effect_index}]trim=duration={tail_seconds}[v_trim{effect_index}]")
                         filter_args.append(f"[v_trim{effect_index}]reverse[v_eff{effect_index}]")
+                        video_output_str = f"[v_eff{effect_index}]"
+                elif effect.startswith("show:"):
+                    param = effect.split(":", 2)[1]
+                    if param == '':
+                        param = "0"
+                    show_seconds = float(param)
+                    if show_seconds > 0:
+                        effect_index += 1
+                        filter_args.append(f"{video_output_str}trim=end={show_seconds}[v_eff{effect_index}]")
+                        video_output_str = f"[v_eff{effect_index}]"
+                elif effect.startswith("grid4:"):
+                    param = effect.split(":", 2)[1]
+                    if param == '':
+                        param = "1"
+                    delay_seconds = float(param)
+                    effect_index += 1
+
+                    # 获取分辨率，如果没有设置则使用默认值
+                    if self.resolution:
+                        width, height = self.resolution.split('x')
+                    else:
+                        width, height = "1920", "1080"  # 默认分辨率
+
+                    # 计算四宫格中每个象限的大小
+                    grid_width = int(width) // 2
+                    grid_height = int(height) // 2
+
+                    # 分割视频流为4份
+                    filter_args.append(f"{video_output_str}split=4[grid_v1_{effect_index}][grid_v2_{effect_index}][grid_v3_{effect_index}][grid_v4_{effect_index}]")
+
+                    # 创建黑色背景
+                    filter_args.append(f"color=black:size={width}x{height}:duration=1[bg_{effect_index}]")
+
+                    # 缩放每个视频流到绝对尺寸
+                    filter_args.append(f"[grid_v1_{effect_index}]scale={grid_width}:{grid_height}[v1_scaled_{effect_index}]")
+                    filter_args.append(f"[grid_v2_{effect_index}]scale={grid_width}:{grid_height},tpad=start_duration={delay_seconds}[v2_scaled_{effect_index}]")
+                    filter_args.append(f"[grid_v3_{effect_index}]scale={grid_width}:{grid_height},tpad=start_duration={delay_seconds*2}[v3_scaled_{effect_index}]")
+                    filter_args.append(f"[grid_v4_{effect_index}]scale={grid_width}:{grid_height},tpad=start_duration={delay_seconds*3}[v4_scaled_{effect_index}]")
+
+                    # 使用overlay将四个视频流叠加到四个位置
+                    filter_args.append(f"[bg_{effect_index}][v1_scaled_{effect_index}]overlay=0:0:shortest=1[grid_step1_{effect_index}]")
+                    filter_args.append(f"[grid_step1_{effect_index}][v2_scaled_{effect_index}]overlay=w/2:0:shortest=1[grid_step2_{effect_index}]")
+                    filter_args.append(f"[grid_step2_{effect_index}][v3_scaled_{effect_index}]overlay=0:h/2:shortest=1[grid_step3_{effect_index}]")
+                    filter_args.append(f"[grid_step3_{effect_index}][v4_scaled_{effect_index}]overlay=w/2:h/2:shortest=1[v_eff{effect_index}]")
+
                     video_output_str = f"[v_eff{effect_index}]"
                 ...
             if self.resolution: