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-20260730-052206/scripts/negative-control-attempt-1.py

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+import bpy
+
+# Clear existing objects to start fresh
+bpy.ops.object.select_all(action='SELECT')
+bpy.ops.object.delete()
+
+# Configuration paths and parameters
+INPUT_MOVIE = "/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-052206/source.mov"
+OUTPUT_MP4 = "/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-052206/negative_control.mp4"
+SOURCE_FPS = 25
+TRIM_DURATION_SECONDS = 3.0
+SLOW_FACTOR = 1.5
+RENDER_RESOLUTION = (854, 480)
+
+# Calculate frame values
+trim_frames = int(TRIM_DURATION_SECONDS * SOURCE_FPS)
+slowed_frames = int(trim_frames * SLOW_FACTOR)
+scene = bpy.context.scene
+
+# Create sequence editor
+seq_ed = scene.sequence_editor_create()
+
+# Add movie strip with trim
+movie_strip = seq_ed.sequences.new_movie(
+    name="SourceVideo",
+    filepath=INPUT_MOVIE,
+    channel=1,
+    frame_start=1
+)
+movie_strip.frame_offset_start = 0  # Start at beginning of source
+movie_strip.frame_final_duration = trim_frames  # Trim to 3 seconds
+
+# Locate and trim audio strip (auto-created with movie)
+sound_strip = None
+for strip in seq_ed.sequences:
+    if strip.type == 'SOUND' and strip.channel == 2 and strip.frame_start == 1:
+        sound_strip = strip
+if sound_strip:
+    sound_strip.frame_final_duration = trim_frames  # Keep audio at original speed
+
+# Add speed effect to video (slow motion)
+speed_strip = seq_ed.sequences.new_effect(
+    name="SlowMotion",
+    type='SPEED',
+    channel=3,
+    frame_start=1,
+    frame_end=1 + slowed_frames - 1,
+    target=movie_strip
+)
+speed_strip.speed_control = 'MULTIPLY'
+speed_strip.speed_factor = 1 / SLOW_FACTOR  # 1/1.5 speed factor
+
+# Add subtitle text strip with background box
+text_strip = seq_ed.sequences.new_text(
+    name="Subtitle",
+    text="BIG BUNNY",
+    channel=4,
+    frame_start=1,
+    frame_end=1 + slowed_frames - 1
+)
+text_strip.align_x = 'CENTER'
+text_strip.align_y = 'BOTTOM'
+text_strip.use_box = True
+text_strip.box_color = (0.0, 0.0, 0.0, 0.6)  # Black semi-transparent box
+text_strip.font_size = 48  # Visible size for 854x480 resolution
+
+# Configure render settings
+scene.render.resolution_x = RENDER_RESOLUTION[0]
+scene.render.resolution_y = RENDER_RESOLUTION[1]
+scene.render.resolution_percentage = 100
+scene.render.fps = SOURCE_FPS
+scene.render.fps_base = 1.0
+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.filepath = OUTPUT_MP4
+
+# Set render frame range
+scene.frame_start = 1
+scene.frame_end = 1 + slowed_frames - 1
+
+# Execute render
+bpy.ops.render.render(animation=True)

chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-052206/scripts/negative-control-attempt-2.py

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+import bpy
+
+# Clear existing data
+bpy.ops.wm.read_factory_settings(use_empty=True)
+scene = bpy.context.scene
+
+# Scene 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
+
+# Create sequence editor
+if not scene.sequence_editor:
+    scene.sequence_editor_create()
+seq_ed = scene.sequence_editor
+sequences = seq_ed.sequences
+
+# File paths
+input_movie = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-052206/source.mov'
+output_mp4 = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-052206/negative_control.mp4'
+
+# Add movie strip (3 seconds = 75 frames at 25fps)
+mov_strip = sequences.new_movie(
+    name='SourceMovie',
+    filepath=input_movie,
+    frame_start=1,
+    channel=1
+)
+mov_strip.frame_offset_start = 0
+mov_strip.frame_final_duration = 75  # 3s * 25fps
+
+# Locate and trim sound strip
+sound_strip = next((s for s in sequences if s.type == 'SOUND' and s.frame_start == mov_strip.frame_start), None)
+if sound_strip:
+    sound_strip.frame_final_duration = 75  # Keep original audio duration
+
+# Add speed effect (1.5x slowdown)
+speed_strip = sequences.new_effect(
+    name='SlowMotion',
+    type='SPEED',
+    frame_start=1,
+    channel=2,
+    input_1=mov_strip
+)
+speed_strip.speed_control = 'MULTIPLY'
+speed_strip.speed_factor = 1 / 1.5
+
+# Calculate slowed duration (4.5s = 112.5 frames → 113 frames)
+slowed_frames = int(4.5 * 25) + 1
+scene.frame_start = 1
+scene.frame_end = slowed_frames
+
+# Add subtitle text strip
+text_strip = sequences.new_effect(
+    name='Subtitle',
+    type='TEXT',
+    frame_start=1,
+    frame_end=scene.frame_end,
+    channel=3
+)
+text_strip.text = 'BIG BUNNY'
+text_strip.align_x = 'CENTER'
+text_strip.align_y = 'BOTTOM'
+text_strip.use_box = True
+text_strip.box_color = (0, 0, 0, 0.6)
+text_strip.font_size = 48
+
+# Render settings
+scene.render.filepath = output_mp4
+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'
+
+# Render animation
+bpy.ops.render.render(animation=True)

chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-052206/scripts/negative-control-attempt-3.py

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+import bpy
+import os
+
+# Clear default objects
+bpy.ops.object.select_all(action='SELECT')
+bpy.ops.object.delete()
+
+# Set up scene
+scene = bpy.context.scene
+scene.render.fps = 25
+scene.render.fps_base = 1.0
+scene.render.resolution_x = 854
+scene.render.resolution_y = 480
+scene.render.resolution_percentage = 100
+
+# Configure 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.audio_bitrate = 192
+output_path = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-052206/negative_control.mp4'
+scene.render.filepath = output_path
+
+# Create sequence editor
+scene.sequence_editor_create()
+sequences = scene.sequence_editor.sequences
+
+# Import source movie and sound
+source_path = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-052206/source.mov'
+movie_strip = sequences.new_movie(name='SourceMovie', filepath=source_path, channel=1, frame_start=0)
+
+sound_strip = None
+for strip in sequences:
+    if strip.type == 'SOUND' and strip.name.startswith('SourceMovie'):
+        sound_strip = strip
+        break
+if not sound_strip:
+    sound_strip = sequences.new_sound(name='SourceAudio', filepath=source_path, channel=2, frame_start=0)
+
+# Trim to 3-second interval (75 frames at 25fps)
+trim_frames = 75  # 3.0s * 25fps
+movie_strip.frame_start = 0
+movie_strip.frame_final_duration = trim_frames
+sound_strip.frame_start = 0
+sound_strip.frame_final_duration = trim_frames
+
+# Apply speed effect (1.5x slowdown = 4.5s output)
+speed_strip = sequences.new_effect(
+    name='SpeedControl',
+    type='SPEED',
+    channel=2,
+    frame_start=0,
+    frame_end=113,  # 75 frames * 1.5 = 112.5 → 113 frames
+    seq1=movie_strip,
+    seq2=None
+)
+speed_strip.speed_control = 'MULTIPLY'
+speed_strip.speed_factor = 1/1.5
+
+# Set scene frame range
+duration_frames = 113  # 4.5s * 25fps = 112.5 → 113 frames
+scene.frame_start = 0
+scene.frame_end = duration_frames
+
+# Add subtitle with background box
+text_strip = sequences.new_effect(
+    name='Subtitle',
+    type='TEXT',
+    channel=3,
+    frame_start=0,
+    frame_end=duration_frames,
+    seq1=None,
+    seq2=None
+)
+text_strip.text = 'BIG BUNNY'
+text_strip.align_x = 'CENTER'
+text_strip.align_y = 'BOTTOM'
+text_strip.use_box = True
+text_strip.box_color = (0.0, 0.0, 0.0, 0.6)
+text_strip.font_size = 48
+
+# Render animation
+bpy.ops.render.render(animation=True)

chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-052206/scripts/negative-control-attempt-4.py

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+import bpy
+import os
+
+# Clear existing data
+bpy.ops.wm.read_factory_settings(use_empty=True)
+
+# Get the current scene
+scene = bpy.context.scene
+
+# Set render resolution (854x480 for H.264 even width)
+scene.render.resolution_x = 854
+scene.render.resolution_y = 480
+scene.render.resolution_percentage = 100
+
+# Set frame rate (25 FPS)
+scene.render.fps = 25
+scene.render.fps_base = 1.0
+
+# Output settings
+output_path = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-052206/negative_control.mp4'
+scene.render.filepath = output_path
+scene.render.image_settings.file_format = 'FFMPEG'
+scene.render.ffmpeg.format = 'MPEG4'
+scene.render.ffmpeg.codec = 'H.264'
+scene.render.ffmpeg.audio_codec = 'AAC'
+scene.render.ffmpeg.audio_mixrate = 44100
+scene.render.ffmpeg.audio_bitrate = 192
+scene.render.use_audio = True
+
+# Create sequence editor
+scene.sequence_editor_create()
+seq_ed = scene.sequence_editor
+
+# Source movie path
+source_path = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-052206/source.mov'
+
+# Add video strip with trim (0.000-3.000s = 75 frames @25FPS)
+video_strip = seq_ed.sequences.new_movie(
+    name='Video',
+    filepath=source_path,
+    channel=1,
+    frame_start=1
+)
+video_strip.frame_offset_start = 0  # Start at 0s of source
+video_strip.frame_final_duration = 75  # Trim to 3s (75 frames)
+
+# Add SPEED effect for slow motion (1.5x duration)
+ speed_effect = seq_ed.sequences.new_effect(
+    name='SpeedControl',
+    type='SPEED',
+    channel=2,
+    frame_start=1,
+    seq1=video_strip
+)
+speed_effect.speed_control = 'MULTIPLY'
+speed_effect.speed_factor = 1/1.5  # Slow playback speed
+
+# Extend video duration to 1.5x trimmed interval (4.5s = 112.5 frames → 113 frames)
+video_strip.frame_final_duration = 113
+
+# Configure audio strip (trim to original 3s duration)
+sound_strip = None
+for strip in seq_ed.sequences:
+    if strip.type == 'SOUND' and strip.name.startswith('Audio'):
+        sound_strip = strip
+if sound_strip:
+    sound_strip.frame_offset_start = 0  # Start at 0s of source audio
+    sound_strip.frame_final_duration = 75  # Keep original 3s duration
+
+# Add subtitle text strip with background box
+text_strip = seq_ed.sequences.new_effect(
+    name='Subtitle',
+    type='TEXT',
+    channel=3,
+    frame_start=1,
+    frame_final_duration=113
+)
+text_strip.text = 'BIG BUNNY'
+text_strip.align_x = 'CENTER'
+text_strip.align_y = 'BOTTOM'
+text_strip.use_box = True
+text_strip.box_color = (0, 0, 0, 0.6)  # Semi-transparent black box
+text_strip.font_size = 48
+
+# Set scene frame range to match slowed video duration
+scene.frame_start = 1
+scene.frame_end = 113
+
+# Render the animation
+bpy.ops.render.render(animation=True)

chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-052206/scripts/negative-control-attempt-5.py

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+import bpy
+
+# Clear existing data
+bpy.ops.wm.read_factory_settings(use_empty=True)
+
+# Get the 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 output settings
+output_path = "/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-052206/negative_control.mp4"
+scene.render.filepath = output_path
+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'
+
+# Create sequence editor
+seq_ed = scene.sequence_editor_create()
+
+# Import movie strip
+movie_path = "/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-052206/source.mov"
+movie_strip = seq_ed.sequences.new_movie(
+    name="SourceMovie",
+    filepath=movie_path,
+    channel=1,
+    frame_start=0
+)
+
+# Trim movie to [0.000, 3.000] seconds (75 frames at 25 FPS)
+movie_strip.frame_offset_start = 0
+movie_strip.frame_final_duration = 75
+
+# Add speed control effect
+speed_strip = seq_ed.sequences.new_effect(
+    name="SpeedControl",
+    type='SPEED',
+    channel=2,
+    frame_start=0,
+    frame_end=movie_strip.frame_start + movie_strip.frame_final_duration,
+    seq1=movie_strip
+)
+speed_strip.speed_control = 'MULTIPLY'
+speed_strip.speed_factor = 1 / 1.5  # Slow down by 1.5x
+
+# Find sound strip and trim it
+sound_strip = None
+for strip in seq_ed.sequences:
+    if strip.type == 'SOUND' and strip.frame_start == movie_strip.frame_start:
+        sound_strip = strip
+        break
+if sound_strip:
+    sound_strip.frame_offset_start = 0
+    sound_strip.frame_final_duration = 75  # Keep sound at normal duration
+
+# Calculate render duration: 3s * 1.5 = 4.5s = 112.5 frames → 113 frames (0-112)
+scene.frame_start = 0
+scene.frame_end = 113  # 113 frames total
+
+# Add subtitle text strip
+text_strip = seq_ed.sequences.new_effect(
+    name="Subtitle",
+    type='TEXT',
+    channel=3,
+    frame_start=0,
+    frame_end=scene.frame_end
+)
+text_strip.text = "BIG BUNNY"
+text_strip.align_x = 'CENTER'
+text_strip.align_y = 'BOTTOM'
+text_strip.font_size = 48
+text_strip.color = (1, 1, 1, 1)  # White text
+text_strip.use_box = True
+text_strip.box_color = (0, 0, 0, 0.6)  # Dark semi-transparent box
+
+# Render animation
+scene.render.engine = 'BLENDER_EEVEE'
+bpy.ops.render.render(animation=True)

chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-052206/scripts/negative-control-attempt-6.py

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+import bpy
+import math
+
+# Clear existing objects
+bpy.ops.object.select_all(action='SELECT')
+bpy.ops.object.delete()
+
+# File paths
+input_path = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-052206/source.mov'
+output_path = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-052206/negative_control.mp4'
+
+# Scene setup
+scene = bpy.context.scene
+
+# Render settings
+scene.render.fps = 25
+scene.render.fps_base = 1.0
+scene.render.resolution_x = 854
+scene.render.resolution_y = 480
+scene.render.resolution_percentage = 100
+
+# Output format settings
+scene.render.image_settings.file_format = 'MPEG4'
+scene.render.ffmpeg.format = 'MPEG4'
+scene.render.ffmpeg.codec = 'H264'
+scene.render.ffmpeg.audio_codec = 'AAC'
+scene.render.filepath = output_path
+
+# VSE setup
+scene.sequence_editor_create()
+seq_ed = scene.sequence_editor
+
+# Add video strip
+video_strip = seq_ed.sequences.new_movie(
+    name='Video',
+    filepath=input_path,
+    frame_start=0,
+    channel=1
+)
+video_strip.frame_final_duration = 75  # 3s * 25fps
+
+# Add speed effect (1.5x slowdown)
+original_duration = 75
+new_duration = math.ceil(original_duration * 1.5)  # 113 frames (4.52s)
+speed_strip = seq_ed.sequences.new_effect(
+    name='SpeedControl',
+    type='SPEED',
+    channel=2,
+    frame_start=0,
+    frame_end=new_duration,
+    seq1=video_strip
+)
+speed_strip.speed_control = 'MULTIPLY'
+speed_strip.speed_factor = 1/1.5
+
+# Add audio strip
+audio_strip = seq_ed.sequences.new_sound(
+    name='Audio',
+    filepath=input_path,
+    frame_start=0,
+    channel=3
+)
+audio_strip.frame_final_duration = 75  # Keep original audio duration
+
+# Add subtitle text strip
+text_strip = seq_ed.sequences.new_effect(
+    name='Subtitle',
+    type='TEXT',
+    channel=4,
+    frame_start=0,
+    frame_end=new_duration
+)
+text_strip.text = 'BIG BUNNY'
+text_strip.align_x = 'CENTER'
+text_strip.align_y = 'BOTTOM'
+text_strip.font_size = 48
+text_strip.use_box = True
+text_strip.box_color = (0, 0, 0, 0.6)  # Semi-transparent black box
+
+# Set render frame range
+scene.frame_start = 1
+scene.frame_end = new_duration
+
+# Render animation
+bpy.ops.render.render(animation=True)