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