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84 lines
2.5 KiB
Python
84 lines
2.5 KiB
Python
import bpy
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import os
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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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scene.render.fps = 25
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scene.render.fps_base = 1.0
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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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# Configure output settings
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scene.render.image_settings.file_format = 'FFMPEG'
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scene.render.ffmpeg.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.ffmpeg.audio_bitrate = 192
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output_path = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-052206/negative_control.mp4'
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scene.render.filepath = output_path
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# Create sequence editor
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scene.sequence_editor_create()
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sequences = scene.sequence_editor.sequences
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# Import source movie and sound
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source_path = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-052206/source.mov'
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movie_strip = sequences.new_movie(name='SourceMovie', filepath=source_path, channel=1, frame_start=0)
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sound_strip = None
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for strip in sequences:
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if strip.type == 'SOUND' and strip.name.startswith('SourceMovie'):
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sound_strip = strip
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break
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if not sound_strip:
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sound_strip = sequences.new_sound(name='SourceAudio', filepath=source_path, channel=2, frame_start=0)
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# Trim to 3-second interval (75 frames at 25fps)
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trim_frames = 75 # 3.0s * 25fps
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movie_strip.frame_start = 0
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movie_strip.frame_final_duration = trim_frames
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sound_strip.frame_start = 0
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sound_strip.frame_final_duration = trim_frames
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# Apply speed effect (1.5x slowdown = 4.5s output)
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speed_strip = sequences.new_effect(
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name='SpeedControl',
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type='SPEED',
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channel=2,
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frame_start=0,
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frame_end=113, # 75 frames * 1.5 = 112.5 → 113 frames
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seq1=movie_strip,
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seq2=None
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)
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speed_strip.speed_control = 'MULTIPLY'
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speed_strip.speed_factor = 1/1.5
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# Set scene frame range
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duration_frames = 113 # 4.5s * 25fps = 112.5 → 113 frames
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scene.frame_start = 0
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scene.frame_end = duration_frames
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# Add subtitle with background box
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text_strip = sequences.new_effect(
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name='Subtitle',
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type='TEXT',
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channel=3,
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frame_start=0,
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frame_end=duration_frames,
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seq1=None,
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seq2=None
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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 = 'BOTTOM'
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text_strip.use_box = True
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text_strip.box_color = (0.0, 0.0, 0.0, 0.6)
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text_strip.font_size = 48
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# Render animation
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bpy.ops.render.render(animation=True) |