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98 lines
2.5 KiB
Python
98 lines
2.5 KiB
Python
import bpy
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# Clear existing data
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bpy.ops.wm.read_factory_settings(use_empty=True)
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scene = bpy.context.scene
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# Configuration
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INPUT_PATH = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/source.mov'
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OUTPUT_PATH = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/negative_control.mp4'
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FPS = 25
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START_SECONDS = 0.000
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END_SECONDS = 3.000
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# Calculate timing variables
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start_frame = int(round(START_SECONDS * FPS))
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dur_frames = max(1, int(round((END_SECONDS - START_SECONDS) * FPS)))
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render_dur = int(round(dur_frames * 1.5))
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# Scene settings
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scene.frame_start = 1
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scene.frame_end = render_dur
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scene.render.fps = FPS
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scene.render.fps_base = 1.0
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# Render resolution (854x480 for H.264 compatibility)
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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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# 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.constant_rate_factor = 'MEDIUM'
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scene.render.ffmpeg.audio_codec = 'AAC'
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scene.render.ffmpeg.audio_bitrate = 192
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scene.render.ffmpeg.audio_channels = 'STEREO'
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scene.render.ffmpeg.audio_sample_rate = 44100
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scene.render.filepath = OUTPUT_PATH
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# Create sequence editor
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se = scene.sequence_editor_create()
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# Add video clip
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movie = se.sequences.new_movie(
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name='clip',
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filepath=INPUT_PATH,
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channel=1,
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frame_start=1 - start_frame
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)
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# Add audio track
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sound = se.sequences.new_sound(
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name='audio',
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filepath=INPUT_PATH,
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channel=2,
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frame_start=1 - start_frame
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)
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# Set initial trim for video and audio
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for strip in (movie, sound):
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strip.frame_offset_start = start_frame
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strip.frame_final_duration = dur_frames
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# Add slow-motion effect to video
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speed = se.sequences.new_effect(
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name='slowmo',
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type='SPEED',
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channel=3,
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frame_start=1,
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frame_end=1 + dur_frames,
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seq1=movie
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)
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speed.speed_control = 'MULTIPLY'
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speed.speed_factor = 1 / 1.5
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speed.use_default_fade = False
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# Extend video duration for slow-motion
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movie.frame_final_duration = render_dur
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# Add subtitle with background box
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text = se.sequences.new_effect(
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name='subtitle',
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type='TEXT',
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channel=4,
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frame_start=1,
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frame_end=1 + render_dur
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)
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text.text = 'BIG BUNNY'
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text.location = (0.5, 0.12)
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text.align_x = 'CENTER'
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text.align_y = 'BOTTOM'
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text.font_size = 48
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text.use_box = True
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text.box_color = (0.0, 0.0, 0.0, 0.6)
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# Render animation
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bpy.ops.render.render(animation=True) |