ai-agent-book 精选快照（<2MB 代码与文档，来自 github.com/bojieli/ai-agent-book）

chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-050817/scripts/negative-control-attempt-1.py

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+import bpy
+
+# Clear default objects
+bpy.ops.object.select_all(action='SELECT')
+bpy.ops.object.delete()
+
+# Set up scene and sequence editor
+scene = bpy.context.scene
+scene.sequence_editor = scene.sequence_editor_create()
+se = scene.sequence_editor
+
+# File paths
+input_path = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-050817/source.mov'
+output_path = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-050817/negative_control.mp4'
+
+# Video parameters
+source_fps = 25
+trim_start_sec = 0.0
+trim_end_sec = 3.0
+trim_duration_sec = trim_end_sec - trim_start_sec
+trim_duration_frames = int(trim_duration_sec * source_fps)  # 75 frames
+output_duration_sec = trim_duration_sec * 1.5  # 4.5 seconds
+output_duration_frames = int(output_duration_sec * source_fps)  # 113 frames (rounded up from 112.5)
+
+speed_factor = trim_duration_sec / output_duration_sec  # 0.666...
+
+# Add video strip
+video_strip = se.sequences.new_movie(
+    name='Video',
+    filepath=input_path,
+    channel=2,
+    frame_start=1
+)
+video_strip.frame_offset_start = 0  # Start at 0s of source
+video_strip.frame_final_duration = trim_duration_frames  # Trim to 3 seconds
+
+# Add audio strip
+audio_strip = se.sequences.new_sound(
+    name='Audio',
+    filepath=input_path,
+    channel=1,
+    frame_start=1
+)
+audio_strip.frame_offset_start = 0
+audio_strip.frame_final_duration = trim_duration_frames
+
+# Add speed effect to video
+speed_video = se.sequences.new_effect(
+    name='Speed_Video',
+    type='SPEED',
+    channel=3,
+    frame_start=1,
+    seq1=video_strip
+)
+speed_video.speed_factor = speed_factor
+ speed_video.frame_final_duration = output_duration_frames
+
+# Add speed effect to audio
+speed_audio = se.sequences.new_effect(
+    name='Speed_Audio',
+    type='SPEED',
+    channel=2,
+    frame_start=1,
+    seq1=audio_strip
+)
+speed_audio.speed_factor = speed_factor
+ speed_audio.frame_final_duration = output_duration_frames
+
+# Add subtitle text strip
+text_strip = se.sequences.new_effect(
+    name='Subtitle',
+    type='TEXT',
+    channel=4,
+    frame_start=1,
+    frame_end=1 + output_duration_frames - 1
+)
+text_strip.text = 'BIG BUNNY'
+text_strip.align_x = 'CENTER'
+text_strip.align_y = 'BOTTOM'
+text_strip.font_size = 48
+text_strip.color = (1.0, 1.0, 1.0, 1.0)  # White text
+
+# Subtitle background box
+text_strip.use_box = True
+text_strip.box_color = (0.0, 0.0, 0.0, 0.5)  # Semi-transparent black
+text_strip.box_margin_left = 10
+text_strip.box_margin_right = 10
+text_strip.box_margin_top = 10
+text_strip.box_margin_bottom = 10
+
+# Render settings
+scene.render.resolution_x = 854
+scene.render.resolution_y = 480
+scene.render.resolution_percentage = 100
+scene.render.fps = source_fps
+scene.render.fps_base = 1.0
+
+# Output format settings
+scene.render.image_settings.file_format = 'MPEG4'
+scene.render.ffmpeg.format = 'MPEG4'
+scene.render.ffmpeg.codec = 'H.264'
+scene.render.ffmpeg.audio_codec = 'AAC'
+scene.render.ffmpeg.audio_bitrate = 192
+scene.render.ffmpeg.constant_rate_factor = 'MEDIUM'
+scene.render.filepath = output_path
+
+# Set scene frame range
+scene.frame_start = 1
+scene.frame_end = output_duration_frames
+
+# Render animation
+bpy.ops.render.render(animation=True)

chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-050817/scripts/negative-control-attempt-2.py

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+import bpy
+import math
+
+# Clear default objects
+bpy.ops.object.select_all(action='SELECT')
+bpy.ops.object.delete()
+
+# Set up scene
+scene = bpy.context.scene
+
+# Render settings
+scene.render.resolution_x = 854
+scene.render.resolution_y = 480
+scene.render.resolution_percentage = 100
+scene.render.fps = 25
+scene.render.fps_base = 1.0
+scene.render.image_settings.file_format = 'MPEG4'
+scene.render.ffmpeg.codec = 'H264'
+scene.render.ffmpeg.audio_codec = 'AAC'
+scene.render.filepath = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-050817/negative_control.mp4'
+
+# Set up Video Sequence Editor
+if not scene.sequence_editor:
+    scene.sequence_editor_create()
+scene.sequence_editor.sequences.clear()
+
+# Import source movie
+input_path = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-050817/source.mov'
+movie_strip = scene.sequence_editor.sequences.new_movie(
+    name='Source',
+    filepath=input_path,
+    channel=1,
+    frame_start=1
+)
+# Trim to 3 seconds (75 frames at 25fps)
+movie_strip.frame_final_duration = 75
+
+# Add speed effect (1.5x duration = 2/3 speed)
+speed_strip = scene.sequence_editor.sequences.new_effect(
+    name='Slow',
+    type='SPEED',
+    channel=2,
+    frame_start=1,
+    frame_end=movie_strip.frame_final_end,
+    seq1=movie_strip
+)
+speed_strip.speed_factor = 2/3  # 3s * 1.5 = 4.5s duration
+
+# Calculate scene frame range
+slowed_frames = movie_strip.frame_final_duration / speed_strip.speed_factor
+scene.frame_start = 1
+scene.frame_end = math.ceil(scene.frame_start + slowed_frames - 1)
+
+# Create sequence editor if not exists
+if not scene.sequence_editor:
+    scene.sequence_editor_create()
+
+# Subtitle background (semi-transparent dark box)
+color_strip = scene.sequence_editor.sequences.new_effect(
+    name='SubtitleBG',
+    type='COLOR',
+    channel=3,
+    frame_start=scene.frame_start,
+    frame_end=scene.frame_end
+)
+color_strip.color = (0.0, 0.0, 0.0)  # Black
+color_strip.alpha = 0.5  # Semi-transparent
+color_strip.transform.scale_x = 0.4  # Box width
+color_strip.transform.scale_y = 0.15  # Box height
+color_strip.transform.translate_y = -0.4  # Bottom position
+color_strip.transform.align_x = 'CENTER'  # Center horizontally
+
+# Subtitle text
+text_strip = scene.sequence_editor.sequences.new_effect(
+    name='SubtitleText',
+    type='TEXT',
+    channel=4,
+    frame_start=scene.frame_start,
+    frame_end=scene.frame_end
+)
+text_strip.text = 'BIG BUNNY'
+text_strip.align_x = 'CENTER'
+text_strip.align_y = 'CENTER'
+text_strip.font_size = 40
+text_strip.color = (1.0, 1.0, 1.0)  # White text
+text_strip.transform.translate_y = -0.4  # Match background Y position
+text_strip.transform.align_x = 'CENTER'
+
+# Render animation
+bpy.ops.render.render(animation=True)

chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-050817/scripts/negative-control-attempt-3.py

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+import bpy
+
+# Clear existing data to start fresh
+bpy.ops.wm.read_factory_settings(use_empty=True)
+
+# Get the current scene
+scene = bpy.context.scene
+
+# Set render resolution and FPS
+scene.render.resolution_x = 854
+scene.render.resolution_y = 480
+scene.render.resolution_percentage = 100
+scene.render.fps = 25
+scene.render.fps_base = 1.0
+
+# Set render output settings
+scene.render.image_settings.file_format = 'FFMPEG'
+scene.render.ffmpeg.format = 'MPEG4'
+scene.render.ffmpeg.codec = 'H264'
+scene.render.ffmpeg.audio_codec = 'AAC'
+scene.render.ffmpeg.constant_rate_factor = 'MEDIUM'
+scene.render.filepath = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-050817/negative_control.mp4'
+
+# Create sequence editor
+scene.sequence_editor_create()
+seq_ed = scene.sequence_editor
+
+# Input movie path
+input_movie = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-050817/source.mov'
+
+# Add video strip with trim (0.000-3.000s = 0-75 frames at 25fps)
+video_strip = seq_ed.sequences.new_movie(name='Video', filepath=input_movie, channel=1, frame_start=0)
+video_strip.frame_offset_start = 0  # Start at source frame 0
+video_strip.frame_final_duration = 75  # 3s * 25fps = 75 frames
+
+# Add speed effect to slow down (1.5x duration: 3s → 4.5s = 112.5 frames → 113 frames)
+speed_effect = seq_ed.sequences.new_effect(name='Speed', type='SPEED', channel=2, frame_start=0, frame_end=113, seq1=video_strip)
+speed_effect.speed_factor = 2/3  # Slows to 1.5x original duration
+
+# Add audio strip from movie
+audio_strip = seq_ed.sequences.new_sound(name='Audio', filepath=input_movie, channel=1, frame_start=0)
+audio_strip.frame_offset_start = 0  # Match video trim start
+audio_strip.frame_final_duration = 75  # Match video trim duration
+
+# Add speed effect to audio
+audio_speed = seq_ed.sequences.new_effect(name='AudioSpeed', type='SPEED', channel=2, frame_start=0, frame_end=113, seq1=audio_strip)
+audio_speed.speed_factor = 2/3
+audio_speed.use_audio = True
+
+# Create subtitle background (semi-transparent dark box)
+bg_strip = seq_ed.sequences.new_effect(name='SubtitleBG', type='COLOR', channel=3, frame_start=0, frame_end=113)
+bg_strip.color = (0.1, 0.1, 0.1, 0.7)  # Dark gray with 70% transparency
+bg_strip.align_x = 'CENTER'
+bg_strip.align_y = 'BOTTOM'
+bg_strip.transform.scale_x = 0.5  # Width of background box
+bg_strip.transform.scale_y = 0.15  # Height of background box
+bg_strip.transform.location_y = 0.03  # Position slightly above bottom edge
+
+# Create subtitle text
+text_strip = seq_ed.sequences.new_effect(name='SubtitleText', type='TEXT', channel=4, frame_start=0, frame_end=113)
+text_strip.text = 'BIG BUNNY'
+text_strip.align_x = 'CENTER'
+text_strip.align_y = 'BOTTOM'
+text_strip.font_size = 48
+text_strip.color = (1.0, 1.0, 1.0)  # White text
+text_strip.transform.location_y = 0.05  # Align with background box
+
+# Set scene frame range to cover slowed duration (4.5 seconds = 112.5 frames → 113 frames)
+scene.frame_start = 0
+scene.frame_end = 113
+
+# Render the animation
+bpy.ops.render.render(animation=True)