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