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This commit is contained in:
2026-08-20 13:12:50 +00:00
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Blender 4.3.2
build date: 2024-12-17
build time: 02:14:25
build commit date: 2024-12-16
build commit time: 21:10
build hash: 32f5fdce0a0a
build branch: blender-v4.3-release
build platform: Darwin
build type: Release
build c flags: -Wall -Werror=implicit-function-declaration -Werror=return-type -Wno-tautological-compare -Wno-unknown-pragmas -Wno-char-subscripts -Wstrict-prototypes -Wmissing-prototypes -Wunused-parameter -Wundef -Wundef-prefix -Werror=unguarded-availability-new -mmacosx-version-min=11.2 -Xclang -fopenmp -I'/Users/blender/git/blender-v430/blender.git/lib/macos_arm64/openmp/include' -std=gnu11 -pipe -funsigned-char -fno-strict-aliasing -ffp-contract=off
build c++ flags: -Wall -Wc++20-designator -Wno-tautological-compare -Wno-unknown-pragmas -Wno-char-subscripts -Wno-overloaded-virtual -Wno-sign-compare -Wno-invalid-offsetof -Wno-suggest-override -Wundef -Wundef-prefix -Wunused-parameter -Wmismatched-tags -Werror=unguarded-availability-new -mmacosx-version-min=11.2 -ftemplate-depth=1024 -Xclang -fopenmp -I'/Users/blender/git/blender-v430/blender.git/lib/macos_arm64/openmp/include' -pipe -funsigned-char -fno-strict-aliasing -ffp-contract=off
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"content": "Generate a complete Blender 4.3 Python script for this video edit.\n\nInput movie: /Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/source.mov\nOutput MP4: /Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/negative_control.mp4\nSource FPS: 25\nSource size: 853x480; render at 854x480 (one-pixel even-width pad required by H.264)\nTrim interval: [0.000, 3.000] seconds\nEffects: slow playback so output duration is 1.5 times the trimmed interval; add bottom-centered subtitle BIG BUNNY with a visible semi-transparent dark box.\n\nRequirements:\n- Use bpy and Blender's Video Sequence Editor, including new_movie, new_sound when available, frame_offset_start/frame_final_duration, a SPEED effect, and a TEXT effect.\n- Render exactly 854x480 at 25 fps through Blender to MPEG-4 H.264 with AAC audio.\n- Set the scene frame range to the slowed duration and call bpy.ops.render.render(animation=True).\n- Create only the requested output. Do not invoke ffmpeg, subprocesses, a shell, the network, or read credentials.\n- Use APIs available in Blender 4.3 (scene.sequence_editor_create().sequences).\n- In Blender 4.3, SpeedControlSequence has no use_audio property. Never read or assign use_audio, and do not apply a SPEED effect to the sound strip. A valid movie slow-motion pattern is speed_control='MULTIPLY', speed_factor=1/1.5, and extending the movie/render duration; the sound strip may remain normally trimmed.\n- For the subtitle background, prefer the TEXT strip's use_box=True and box_color=(0,0,0,0.6); do not assume a COLOR strip has text-layout properties.\n\nUse this real-Blender-4.3-validated timing pattern, substituting the supplied paths and interval but preserving the timing relationships exactly:\n```\nFPS = 25\nstart_frame = int(round(START_SECONDS * FPS))\ndur_frames = max(1, int(round((END_SECONDS - START_SECONDS) * FPS)))\nrender_dur = int(round(dur_frames * 1.5))\nse = scene.sequence_editor_create()\nmovie = se.sequences.new_movie(name='clip', filepath=INPUT_PATH, channel=1,\n frame_start=1 - start_frame)\nsound = se.sequences.new_sound(name='audio', filepath=INPUT_PATH, channel=2,\n frame_start=1 - start_frame)\nfor strip in (movie, sound):\n strip.frame_offset_start = start_frame\n strip.frame_final_duration = dur_frames\nspeed = se.sequences.new_effect(name='slowmo', type='SPEED', channel=3,\n frame_start=1, frame_end=1 + dur_frames, seq1=movie)\nspeed.use_default_fade = False\nspeed.speed_control = 'MULTIPLY'\nspeed.speed_factor = 1.0 / 1.5\nmovie.frame_final_duration = render_dur\ntext = se.sequences.new_effect(name='subtitle', type='TEXT', channel=4,\n frame_start=1, frame_end=1 + render_dur)\ntext.text = 'BIG BUNNY'; text.location = (0.5, 0.12)\ntext.align_x = 'CENTER'; text.align_y = 'BOTTOM'\ntext.use_box = True; text.box_color = (0.0, 0.0, 0.0, 0.6)\nscene.frame_start = 1; scene.frame_end = render_dur\n```\nThis pattern was executed against Blender 4.3.2 and visibly retained the requested source frames through the whole slowed output. Do not replace its negative source-strip frame_start with frame_start=1: frame_offset_start would then move the visible strip later and render black frames.\n\nReturn one JSON object only: {\"code\":\"complete executable Python source\"}.\n"
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"content": "{\"code\": \"import bpy\\n\\n# Configuration\\nINPUT_PATH = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/source.mov'\\nOUTPUT_PATH = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/negative_control.mp4'\\nSTART_SECONDS = 0.000\\nEND_SECONDS = 3.000\\nFPS = 25\\n\\n# Calculate timing parameters\\nstart_frame = int(round(START_SECONDS * FPS))\\ndur_frames = max(1, int(round((END_SECONDS - START_SECONDS) * FPS)))\\nrender_dur = int(round(dur_frames * 1.5))\\n\\n# Initialize scene\\nscene = bpy.context.scene\\nscene.sequence_editor_clear()\\n\\n# Render settings\\nscene.render.resolution_x = 854\\nscene.render.resolution_y = 480\\nscene.render.resolution_percentage = 100\\nscene.render.fps = FPS\\nscene.render.fps_base = 1.0\\nscene.render.filepath = OUTPUT_PATH\\nscene.render.image_settings.file_format = 'MPEG4'\\nscene.render.ffmpeg.format = 'MPEG4'\\nscene.render.ffmpeg.codec = 'H264'\\nscene.render.ffmpeg.audio_codec = 'AAC'\\n\\n# Video Sequence Editor setup\\nse = scene.sequence_editor_create()\\n\\n# Add movie and audio strips\\nmovie = se.sequences.new_movie(\\n name='clip',\\n filepath=INPUT_PATH,\\n channel=1,\\n frame_start=1 - start_frame\\n)\\nsound = se.sequences.new_sound(\\n name='audio',\\n filepath=INPUT_PATH,\\n channel=2,\\n frame_start=1 - start_frame\\n)\\n\\n# Set trim for both media strips\\nfor strip in (movie, sound):\\n strip.frame_offset_start = start_frame\\n strip.frame_final_duration = dur_frames\\n\\n# Add speed effect for slow motion\\nspeed = se.sequences.new_effect(\\n name='slowmo',\\n type='SPEED',\\n channel=3,\\n frame_start=1,\\n frame_end=1 + dur_frames,\\n seq1=movie\\n)\\nspeed.speed_control = 'MULTIPLY'\\nspeed.speed_factor = 1 / 1.5\\nspeed.use_default_fade = False\\n\\n# Extend movie strip to match render duration\\nmovie.frame_final_duration = render_dur\\n\\n# Add subtitle text strip\\ntext = se.sequences.new_effect(\\n name='subtitle',\\n type='TEXT',\\n channel=4,\\n frame_start=1,\\n frame_end=1 + render_dur\\n)\\ntext.text = 'BIG BUNNY'\\ntext.location = (0.5, 0.12)\\ntext.align_x = 'CENTER'\\ntext.align_y = 'BOTTOM'\\ntext.use_box = True\\ntext.box_color = (0, 0, 0, 0.6)\\n\\n# Set render frame range\\nscene.frame_start = 1\\nscene.frame_end = render_dur\\n\\n# Render animation\\nbpy.ops.render.render(animation=True)\"}"
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"content": "Generate a complete Blender 4.3 Python script for this video edit.\n\nInput movie: /Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/source.mov\nOutput MP4: /Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/negative_control.mp4\nSource FPS: 25\nSource size: 853x480; render at 854x480 (one-pixel even-width pad required by H.264)\nTrim interval: [0.000, 3.000] seconds\nEffects: slow playback so output duration is 1.5 times the trimmed interval; add bottom-centered subtitle BIG BUNNY with a visible semi-transparent dark box.\n\nRequirements:\n- Use bpy and Blender's Video Sequence Editor, including new_movie, new_sound when available, frame_offset_start/frame_final_duration, a SPEED effect, and a TEXT effect.\n- Render exactly 854x480 at 25 fps through Blender to MPEG-4 H.264 with AAC audio.\n- Set the scene frame range to the slowed duration and call bpy.ops.render.render(animation=True).\n- Create only the requested output. Do not invoke ffmpeg, subprocesses, a shell, the network, or read credentials.\n- Use APIs available in Blender 4.3 (scene.sequence_editor_create().sequences).\n- In Blender 4.3, SpeedControlSequence has no use_audio property. Never read or assign use_audio, and do not apply a SPEED effect to the sound strip. A valid movie slow-motion pattern is speed_control='MULTIPLY', speed_factor=1/1.5, and extending the movie/render duration; the sound strip may remain normally trimmed.\n- For the subtitle background, prefer the TEXT strip's use_box=True and box_color=(0,0,0,0.6); do not assume a COLOR strip has text-layout properties.\n\nUse this real-Blender-4.3-validated timing pattern, substituting the supplied paths and interval but preserving the timing relationships exactly:\n```\nFPS = 25\nstart_frame = int(round(START_SECONDS * FPS))\ndur_frames = max(1, int(round((END_SECONDS - START_SECONDS) * FPS)))\nrender_dur = int(round(dur_frames * 1.5))\nse = scene.sequence_editor_create()\nmovie = se.sequences.new_movie(name='clip', filepath=INPUT_PATH, channel=1,\n frame_start=1 - start_frame)\nsound = se.sequences.new_sound(name='audio', filepath=INPUT_PATH, channel=2,\n frame_start=1 - start_frame)\nfor strip in (movie, sound):\n strip.frame_offset_start = start_frame\n strip.frame_final_duration = dur_frames\nspeed = se.sequences.new_effect(name='slowmo', type='SPEED', channel=3,\n frame_start=1, frame_end=1 + dur_frames, seq1=movie)\nspeed.use_default_fade = False\nspeed.speed_control = 'MULTIPLY'\nspeed.speed_factor = 1.0 / 1.5\nmovie.frame_final_duration = render_dur\ntext = se.sequences.new_effect(name='subtitle', type='TEXT', channel=4,\n frame_start=1, frame_end=1 + render_dur)\ntext.text = 'BIG BUNNY'; text.location = (0.5, 0.12)\ntext.align_x = 'CENTER'; text.align_y = 'BOTTOM'\ntext.use_box = True; text.box_color = (0.0, 0.0, 0.0, 0.6)\nscene.frame_start = 1; scene.frame_end = render_dur\n```\nThis pattern was executed against Blender 4.3.2 and visibly retained the requested source frames through the whole slowed output. Do not replace its negative source-strip frame_start with frame_start=1: frame_offset_start would then move the visible strip later and render black frames.\n\nReturn one JSON object only: {\"code\":\"complete executable Python source\"}.\n\nPrior executable feedback:\nBlender exit=0; output_exists=False. Tail of real Blender log:\nBlender 4.3.2 (hash 32f5fdce0a0a built 2024-12-17 02:14:25)\nTraceback (most recent call last):\n File \"/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/scripts/negative-control-attempt-1.py\", line 26, in <module>\n scene.render.image_settings.file_format = 'MPEG4'\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\nTypeError: bpy_struct: item.attr = val: enum \"MPEG4\" not found in ('BMP', 'IRIS', 'PNG', 'JPEG', 'JPEG2000', 'TARGA', 'TARGA_RAW', 'CINEON', 'DPX', 'OPEN_EXR_MULTILAYER', 'OPEN_EXR', 'HDR', 'TIFF', 'WEBP', 'FFMPEG')\n\nBlender quit"
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"content": "{\"code\": \"import bpy\\n\\n# Clear existing data\\nbpy.ops.wm.read_factory_settings(use_empty=True)\\nscene = bpy.context.scene\\n\\n# Configuration\\nINPUT_PATH = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/source.mov'\\nOUTPUT_PATH = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/negative_control.mp4'\\nFPS = 25\\nSTART_SECONDS = 0.000\\nEND_SECONDS = 3.000\\n\\n# Calculate timing variables\\nstart_frame = int(round(START_SECONDS * FPS))\\ndur_frames = max(1, int(round((END_SECONDS - START_SECONDS) * FPS)))\\nrender_dur = int(round(dur_frames * 1.5))\\n\\n# Scene settings\\nscene.frame_start = 1\\nscene.frame_end = render_dur\\nscene.render.fps = FPS\\nscene.render.fps_base = 1.0\\n\\n# Render resolution (854x480 for H.264 compatibility)\\nscene.render.resolution_x = 854\\nscene.render.resolution_y = 480\\nscene.render.resolution_percentage = 100\\n\\n# Output settings\\nscene.render.image_settings.file_format = 'FFMPEG'\\nscene.render.ffmpeg.format = 'MPEG4'\\nscene.render.ffmpeg.codec = 'H264'\\nscene.render.ffmpeg.constant_rate_factor = 'MEDIUM'\\nscene.render.ffmpeg.audio_codec = 'AAC'\\nscene.render.ffmpeg.audio_bitrate = 192\\nscene.render.ffmpeg.audio_channels = 'STEREO'\\nscene.render.ffmpeg.audio_sample_rate = 44100\\nscene.render.filepath = OUTPUT_PATH\\n\\n# Create sequence editor\\nse = scene.sequence_editor_create()\\n\\n# Add video clip\\nmovie = se.sequences.new_movie(\\n name='clip',\\n filepath=INPUT_PATH,\\n channel=1,\\n frame_start=1 - start_frame\\n)\\n\\n# Add audio track\\nsound = se.sequences.new_sound(\\n name='audio',\\n filepath=INPUT_PATH,\\n channel=2,\\n frame_start=1 - start_frame\\n)\\n\\n# Set initial trim for video and audio\\nfor strip in (movie, sound):\\n strip.frame_offset_start = start_frame\\n strip.frame_final_duration = dur_frames\\n\\n# Add slow-motion effect to video\\nspeed = se.sequences.new_effect(\\n name='slowmo',\\n type='SPEED',\\n channel=3,\\n frame_start=1,\\n frame_end=1 + dur_frames,\\n seq1=movie\\n)\\nspeed.speed_control = 'MULTIPLY'\\nspeed.speed_factor = 1 / 1.5\\nspeed.use_default_fade = False\\n\\n# Extend video duration for slow-motion\\nmovie.frame_final_duration = render_dur\\n\\n# Add subtitle with background box\\ntext = se.sequences.new_effect(\\n name='subtitle',\\n type='TEXT',\\n channel=4,\\n frame_start=1,\\n frame_end=1 + render_dur\\n)\\ntext.text = 'BIG BUNNY'\\ntext.location = (0.5, 0.12)\\ntext.align_x = 'CENTER'\\ntext.align_y = 'BOTTOM'\\ntext.font_size = 48\\ntext.use_box = True\\ntext.box_color = (0.0, 0.0, 0.0, 0.6)\\n\\n# Render animation\\nbpy.ops.render.render(animation=True)\"}"
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"content": "Generate a complete Blender 4.3 Python script for this video edit.\n\nInput movie: /Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/source.mov\nOutput MP4: /Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/negative_control.mp4\nSource FPS: 25\nSource size: 853x480; render at 854x480 (one-pixel even-width pad required by H.264)\nTrim interval: [0.000, 3.000] seconds\nEffects: slow playback so output duration is 1.5 times the trimmed interval; add bottom-centered subtitle BIG BUNNY with a visible semi-transparent dark box.\n\nRequirements:\n- Use bpy and Blender's Video Sequence Editor, including new_movie, new_sound when available, frame_offset_start/frame_final_duration, a SPEED effect, and a TEXT effect.\n- Render exactly 854x480 at 25 fps through Blender to MPEG-4 H.264 with AAC audio.\n- Set the scene frame range to the slowed duration and call bpy.ops.render.render(animation=True).\n- Create only the requested output. Do not invoke ffmpeg, subprocesses, a shell, the network, or read credentials.\n- Use APIs available in Blender 4.3 (scene.sequence_editor_create().sequences).\n- In Blender 4.3, SpeedControlSequence has no use_audio property. Never read or assign use_audio, and do not apply a SPEED effect to the sound strip. A valid movie slow-motion pattern is speed_control='MULTIPLY', speed_factor=1/1.5, and extending the movie/render duration; the sound strip may remain normally trimmed.\n- For the subtitle background, prefer the TEXT strip's use_box=True and box_color=(0,0,0,0.6); do not assume a COLOR strip has text-layout properties.\n\nUse this real-Blender-4.3-validated timing pattern, substituting the supplied paths and interval but preserving the timing relationships exactly:\n```\nFPS = 25\nstart_frame = int(round(START_SECONDS * FPS))\ndur_frames = max(1, int(round((END_SECONDS - START_SECONDS) * FPS)))\nrender_dur = int(round(dur_frames * 1.5))\nse = scene.sequence_editor_create()\nmovie = se.sequences.new_movie(name='clip', filepath=INPUT_PATH, channel=1,\n frame_start=1 - start_frame)\nsound = se.sequences.new_sound(name='audio', filepath=INPUT_PATH, channel=2,\n frame_start=1 - start_frame)\nfor strip in (movie, sound):\n strip.frame_offset_start = start_frame\n strip.frame_final_duration = dur_frames\nspeed = se.sequences.new_effect(name='slowmo', type='SPEED', channel=3,\n frame_start=1, frame_end=1 + dur_frames, seq1=movie)\nspeed.use_default_fade = False\nspeed.speed_control = 'MULTIPLY'\nspeed.speed_factor = 1.0 / 1.5\nmovie.frame_final_duration = render_dur\ntext = se.sequences.new_effect(name='subtitle', type='TEXT', channel=4,\n frame_start=1, frame_end=1 + render_dur)\ntext.text = 'BIG BUNNY'; text.location = (0.5, 0.12)\ntext.align_x = 'CENTER'; text.align_y = 'BOTTOM'\ntext.use_box = True; text.box_color = (0.0, 0.0, 0.0, 0.6)\nscene.frame_start = 1; scene.frame_end = render_dur\n```\nThis pattern was executed against Blender 4.3.2 and visibly retained the requested source frames through the whole slowed output. Do not replace its negative source-strip frame_start with frame_start=1: frame_offset_start would then move the visible strip later and render black frames.\n\nReturn one JSON object only: {\"code\":\"complete executable Python source\"}.\n\nPrior executable feedback:\nBlender exit=0; output_exists=False. Tail of real Blender log:\nBlender 4.3.2 (hash 32f5fdce0a0a built 2024-12-17 02:14:25)\nTraceback (most recent call last):\n File \"/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/scripts/negative-control-attempt-2.py\", line 38, in <module>\n scene.render.ffmpeg.audio_sample_rate = 44100\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\nAttributeError: 'FFmpegSettings' object has no attribute 'audio_sample_rate'\n\nBlender quit"
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"content": "{\"code\": \"import bpy\\n\\n# Configuration\\nINPUT_PATH = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/source.mov'\\nOUTPUT_PATH = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/negative_control.mp4'\\nFPS = 25\\nSTART_SECONDS = 0.000\\nEND_SECONDS = 3.000\\n\\n# Calculate timing variables\\nstart_frame = int(round(START_SECONDS * FPS))\\ndur_frames = max(1, int(round((END_SECONDS - START_SECONDS) * FPS)))\\nrender_dur = int(round(dur_frames * 1.5))\\n\\n# Scene setup\\nscene = bpy.context.scene\\nscene.sequence_editor_clear() # Ensure clean state\\nse = scene.sequence_editor_create()\\n\\n# Add movie and audio strips\\nmovie = se.sequences.new_movie(\\n name='clip',\\n filepath=INPUT_PATH,\\n channel=1,\\n frame_start=1 - start_frame\\n)\\nsound = se.sequences.new_sound(\\n name='audio',\\n filepath=INPUT_PATH,\\n channel=2,\\n frame_start=1 - start_frame\\n)\\n\\n# Set trim for both strips\\nfor strip in (movie, sound):\\n strip.frame_offset_start = start_frame\\n strip.frame_final_duration = dur_frames\\n\\n# Add speed effect for slow motion\\nspeed = se.sequences.new_effect(\\n name='slowmo',\\n type='SPEED',\\n channel=3,\\n frame_start=1,\\n frame_end=1 + dur_frames,\\n seq1=movie\\n)\\nspeed.use_default_fade = False\\nspeed.speed_control = 'MULTIPLY'\\nspeed.speed_factor = 1.0 / 1.5\\nmovie.frame_final_duration = render_dur # Extend video to render duration\\n\\n# Add subtitle text strip\\ntext = se.sequences.new_effect(\\n name='subtitle',\\n type='TEXT',\\n channel=4,\\n frame_start=1,\\n frame_end=1 + render_dur\\n)\\ntext.text = 'BIG BUNNY'\\ntext.location = (0.5, 0.12) # Center horizontally, near bottom vertically\\ntext.align_x = 'CENTER'\\ntext.align_y = 'BOTTOM'\\ntext.use_box = True\\ntext.box_color = (0.0, 0.0, 0.0, 0.6) # Black semi-transparent background\\n\\n# Render settings\\nscene.frame_start = 1\\nscene.frame_end = render_dur\\nscene.render.fps = FPS\\nscene.render.fps_base = 1.0\\nscene.render.resolution_x = 854\\nscene.render.resolution_y = 480\\nscene.render.resolution_percentage = 100\\nscene.render.image_settings.file_format = 'FFMPEG'\\nscene.render.ffmpeg.format = 'MPEG4'\\nscene.render.ffmpeg.codec = 'H264'\\nscene.render.ffmpeg.audio_codec = 'AAC'\\nscene.render.filepath = OUTPUT_PATH\\n\\n# Execute render\\nbpy.ops.render.render(animation=True)\"}"
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"text": "Independently review these actual rendered keyframes against this edit request:\nCut out the shot of the large white rabbit walking alone in the sunny meadow, slow it to 1.5x duration, and add the subtitle BIG BUNNY along the bottom.\n\nThe target source shot is: the single continuous shot showing the large white rabbit walking alone in a sunny green meadow, after the ONE BIG RABBIT title and before the THREE RODENTS title.\nJudge the pixels, not filenames or claims. Return JSON exactly with:\n{\"pass\":boolean,\"target_present\":boolean,\"irrelevant_content_present\":boolean,\n \"subtitle_visible\":boolean,\"feedback\":\"specific evidence from the frames\"}.\nPass only if all frames show the intended large white rabbit meadow shot without title cards or unrelated scenes and the BIG BUNNY subtitle is visibly overlaid near the bottom.\n"
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"content": "{\"pass\":false,\"target_present\":false,\"irrelevant_content_present\":true,\"subtitle_visible\":true,\"feedback\":\"All frames show title cards with 'THE PEACH OPEN MOVIE PROJECT PRESENTS' and 'BIG BUNNY' on a gray background; no large white rabbit, sunny meadow, or the target rabbit walking shot is visible.\"}"
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"content": "Generate a complete Blender 4.3 Python script for this video edit.\n\nInput movie: /Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/source.mov\nOutput MP4: /Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/final.mp4\nSource FPS: 25\nSource size: 853x480; render at 854x480 (one-pixel even-width pad required by H.264)\nTrim interval: [9.000, 12.000] seconds\nEffects: slow playback so output duration is 1.5 times the trimmed interval; add bottom-centered subtitle BIG BUNNY with a visible semi-transparent dark box.\n\nRequirements:\n- Use bpy and Blender's Video Sequence Editor, including new_movie, new_sound when available, frame_offset_start/frame_final_duration, a SPEED effect, and a TEXT effect.\n- Render exactly 854x480 at 25 fps through Blender to MPEG-4 H.264 with AAC audio.\n- Set the scene frame range to the slowed duration and call bpy.ops.render.render(animation=True).\n- Create only the requested output. Do not invoke ffmpeg, subprocesses, a shell, the network, or read credentials.\n- Use APIs available in Blender 4.3 (scene.sequence_editor_create().sequences).\n- In Blender 4.3, SpeedControlSequence has no use_audio property. Never read or assign use_audio, and do not apply a SPEED effect to the sound strip. A valid movie slow-motion pattern is speed_control='MULTIPLY', speed_factor=1/1.5, and extending the movie/render duration; the sound strip may remain normally trimmed.\n- For the subtitle background, prefer the TEXT strip's use_box=True and box_color=(0,0,0,0.6); do not assume a COLOR strip has text-layout properties.\n\nUse this real-Blender-4.3-validated timing pattern, substituting the supplied paths and interval but preserving the timing relationships exactly:\n```\nFPS = 25\nstart_frame = int(round(START_SECONDS * FPS))\ndur_frames = max(1, int(round((END_SECONDS - START_SECONDS) * FPS)))\nrender_dur = int(round(dur_frames * 1.5))\nse = scene.sequence_editor_create()\nmovie = se.sequences.new_movie(name='clip', filepath=INPUT_PATH, channel=1,\n frame_start=1 - start_frame)\nsound = se.sequences.new_sound(name='audio', filepath=INPUT_PATH, channel=2,\n frame_start=1 - start_frame)\nfor strip in (movie, sound):\n strip.frame_offset_start = start_frame\n strip.frame_final_duration = dur_frames\nspeed = se.sequences.new_effect(name='slowmo', type='SPEED', channel=3,\n frame_start=1, frame_end=1 + dur_frames, seq1=movie)\nspeed.use_default_fade = False\nspeed.speed_control = 'MULTIPLY'\nspeed.speed_factor = 1.0 / 1.5\nmovie.frame_final_duration = render_dur\ntext = se.sequences.new_effect(name='subtitle', type='TEXT', channel=4,\n frame_start=1, frame_end=1 + render_dur)\ntext.text = 'BIG BUNNY'; text.location = (0.5, 0.12)\ntext.align_x = 'CENTER'; text.align_y = 'BOTTOM'\ntext.use_box = True; text.box_color = (0.0, 0.0, 0.0, 0.6)\nscene.frame_start = 1; scene.frame_end = render_dur\n```\nThis pattern was executed against Blender 4.3.2 and visibly retained the requested source frames through the whole slowed output. Do not replace its negative source-strip frame_start with frame_start=1: frame_offset_start would then move the visible strip later and render black frames.\n\nReturn one JSON object only: {\"code\":\"complete executable Python source\"}.\n"
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"content": "{\"start\":9.0,\"end\":12.0,\"reason\":\"The shot begins immediately after the 'ONE BIG RABBIT' title card (which ends at 9.0s) and ends just before the 'THREE RODENTS' title card (which starts at 12.0s). The 10.0s and 11.0s timestamps show the large white rabbit alone in the sunny green meadow, confirming a continuous shot between these boundaries.\"}"
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"content": "Generate a complete Blender 4.3 Python script for this video edit.\n\nInput movie: /Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/source.mov\nOutput MP4: /Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/negative_control.mp4\nSource FPS: 25\nSource size: 853x480; render at 854x480 (one-pixel even-width pad required by H.264)\nTrim interval: [0.000, 3.000] seconds\nEffects: slow playback so output duration is 1.5 times the trimmed interval; add bottom-centered subtitle BIG BUNNY with a visible semi-transparent dark box.\n\nRequirements:\n- Use bpy and Blender's Video Sequence Editor, including new_movie, new_sound when available, frame_offset_start/frame_final_duration, a SPEED effect, and a TEXT effect.\n- Render exactly 854x480 at 25 fps through Blender to MPEG-4 H.264 with AAC audio.\n- Set the scene frame range to the slowed duration and call bpy.ops.render.render(animation=True).\n- Create only the requested output. Do not invoke ffmpeg, subprocesses, a shell, the network, or read credentials.\n- Use APIs available in Blender 4.3 (scene.sequence_editor_create().sequences).\n- In Blender 4.3, SpeedControlSequence has no use_audio property. Never read or assign use_audio, and do not apply a SPEED effect to the sound strip. A valid movie slow-motion pattern is speed_control='MULTIPLY', speed_factor=1/1.5, and extending the movie/render duration; the sound strip may remain normally trimmed.\n- For the subtitle background, prefer the TEXT strip's use_box=True and box_color=(0,0,0,0.6); do not assume a COLOR strip has text-layout properties.\n\nUse this real-Blender-4.3-validated timing pattern, substituting the supplied paths and interval but preserving the timing relationships exactly:\n```\nFPS = 25\nstart_frame = int(round(START_SECONDS * FPS))\ndur_frames = max(1, int(round((END_SECONDS - START_SECONDS) * FPS)))\nrender_dur = int(round(dur_frames * 1.5))\nse = scene.sequence_editor_create()\nmovie = se.sequences.new_movie(name='clip', filepath=INPUT_PATH, channel=1,\n frame_start=1 - start_frame)\nsound = se.sequences.new_sound(name='audio', filepath=INPUT_PATH, channel=2,\n frame_start=1 - start_frame)\nfor strip in (movie, sound):\n strip.frame_offset_start = start_frame\n strip.frame_final_duration = dur_frames\nspeed = se.sequences.new_effect(name='slowmo', type='SPEED', channel=3,\n frame_start=1, frame_end=1 + dur_frames, seq1=movie)\nspeed.use_default_fade = False\nspeed.speed_control = 'MULTIPLY'\nspeed.speed_factor = 1.0 / 1.5\nmovie.frame_final_duration = render_dur\ntext = se.sequences.new_effect(name='subtitle', type='TEXT', channel=4,\n frame_start=1, frame_end=1 + render_dur)\ntext.text = 'BIG BUNNY'; text.location = (0.5, 0.12)\ntext.align_x = 'CENTER'; text.align_y = 'BOTTOM'\ntext.use_box = True; text.box_color = (0.0, 0.0, 0.0, 0.6)\nscene.frame_start = 1; scene.frame_end = render_dur\n```\nThis pattern was executed against Blender 4.3.2 and visibly retained the requested source frames through the whole slowed output. Do not replace its negative source-strip frame_start with frame_start=1: frame_offset_start would then move the visible strip later and render black frames.\n\nReturn one JSON object only: {\"code\":\"complete executable Python source\"}.\n"
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"content": "{\"code\": \"import bpy\\n\\n# Configuration\\nINPUT_PATH = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/source.mov'\\nOUTPUT_PATH = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/negative_control.mp4'\\nSTART_SECONDS = 0.000\\nEND_SECONDS = 3.000\\nFPS = 25\\n\\n# Calculate timing parameters\\nstart_frame = int(round(START_SECONDS * FPS))\\ndur_frames = max(1, int(round((END_SECONDS - START_SECONDS) * FPS)))\\nrender_dur = int(round(dur_frames * 1.5))\\n\\n# Initialize scene\\nscene = bpy.context.scene\\nscene.sequence_editor_clear()\\n\\n# Render settings\\nscene.render.resolution_x = 854\\nscene.render.resolution_y = 480\\nscene.render.resolution_percentage = 100\\nscene.render.fps = FPS\\nscene.render.fps_base = 1.0\\nscene.render.filepath = OUTPUT_PATH\\nscene.render.image_settings.file_format = 'MPEG4'\\nscene.render.ffmpeg.format = 'MPEG4'\\nscene.render.ffmpeg.codec = 'H264'\\nscene.render.ffmpeg.audio_codec = 'AAC'\\n\\n# Video Sequence Editor setup\\nse = scene.sequence_editor_create()\\n\\n# Add movie and audio strips\\nmovie = se.sequences.new_movie(\\n name='clip',\\n filepath=INPUT_PATH,\\n channel=1,\\n frame_start=1 - start_frame\\n)\\nsound = se.sequences.new_sound(\\n name='audio',\\n filepath=INPUT_PATH,\\n channel=2,\\n frame_start=1 - start_frame\\n)\\n\\n# Set trim for both media strips\\nfor strip in (movie, sound):\\n strip.frame_offset_start = start_frame\\n strip.frame_final_duration = dur_frames\\n\\n# Add speed effect for slow motion\\nspeed = se.sequences.new_effect(\\n name='slowmo',\\n type='SPEED',\\n channel=3,\\n frame_start=1,\\n frame_end=1 + dur_frames,\\n seq1=movie\\n)\\nspeed.speed_control = 'MULTIPLY'\\nspeed.speed_factor = 1 / 1.5\\nspeed.use_default_fade = False\\n\\n# Extend movie strip to match render duration\\nmovie.frame_final_duration = render_dur\\n\\n# Add subtitle text strip\\ntext = se.sequences.new_effect(\\n name='subtitle',\\n type='TEXT',\\n channel=4,\\n frame_start=1,\\n frame_end=1 + render_dur\\n)\\ntext.text = 'BIG BUNNY'\\ntext.location = (0.5, 0.12)\\ntext.align_x = 'CENTER'\\ntext.align_y = 'BOTTOM'\\ntext.use_box = True\\ntext.box_color = (0, 0, 0, 0.6)\\n\\n# Set render frame range\\nscene.frame_start = 1\\nscene.frame_end = render_dur\\n\\n# Render animation\\nbpy.ops.render.render(animation=True)\"}"
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"content": "Generate a complete Blender 4.3 Python script for this video edit.\n\nInput movie: /Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/source.mov\nOutput MP4: /Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/negative_control.mp4\nSource FPS: 25\nSource size: 853x480; render at 854x480 (one-pixel even-width pad required by H.264)\nTrim interval: [0.000, 3.000] seconds\nEffects: slow playback so output duration is 1.5 times the trimmed interval; add bottom-centered subtitle BIG BUNNY with a visible semi-transparent dark box.\n\nRequirements:\n- Use bpy and Blender's Video Sequence Editor, including new_movie, new_sound when available, frame_offset_start/frame_final_duration, a SPEED effect, and a TEXT effect.\n- Render exactly 854x480 at 25 fps through Blender to MPEG-4 H.264 with AAC audio.\n- Set the scene frame range to the slowed duration and call bpy.ops.render.render(animation=True).\n- Create only the requested output. Do not invoke ffmpeg, subprocesses, a shell, the network, or read credentials.\n- Use APIs available in Blender 4.3 (scene.sequence_editor_create().sequences).\n- In Blender 4.3, SpeedControlSequence has no use_audio property. Never read or assign use_audio, and do not apply a SPEED effect to the sound strip. A valid movie slow-motion pattern is speed_control='MULTIPLY', speed_factor=1/1.5, and extending the movie/render duration; the sound strip may remain normally trimmed.\n- For the subtitle background, prefer the TEXT strip's use_box=True and box_color=(0,0,0,0.6); do not assume a COLOR strip has text-layout properties.\n\nUse this real-Blender-4.3-validated timing pattern, substituting the supplied paths and interval but preserving the timing relationships exactly:\n```\nFPS = 25\nstart_frame = int(round(START_SECONDS * FPS))\ndur_frames = max(1, int(round((END_SECONDS - START_SECONDS) * FPS)))\nrender_dur = int(round(dur_frames * 1.5))\nse = scene.sequence_editor_create()\nmovie = se.sequences.new_movie(name='clip', filepath=INPUT_PATH, channel=1,\n frame_start=1 - start_frame)\nsound = se.sequences.new_sound(name='audio', filepath=INPUT_PATH, channel=2,\n frame_start=1 - start_frame)\nfor strip in (movie, sound):\n strip.frame_offset_start = start_frame\n strip.frame_final_duration = dur_frames\nspeed = se.sequences.new_effect(name='slowmo', type='SPEED', channel=3,\n frame_start=1, frame_end=1 + dur_frames, seq1=movie)\nspeed.use_default_fade = False\nspeed.speed_control = 'MULTIPLY'\nspeed.speed_factor = 1.0 / 1.5\nmovie.frame_final_duration = render_dur\ntext = se.sequences.new_effect(name='subtitle', type='TEXT', channel=4,\n frame_start=1, frame_end=1 + render_dur)\ntext.text = 'BIG BUNNY'; text.location = (0.5, 0.12)\ntext.align_x = 'CENTER'; text.align_y = 'BOTTOM'\ntext.use_box = True; text.box_color = (0.0, 0.0, 0.0, 0.6)\nscene.frame_start = 1; scene.frame_end = render_dur\n```\nThis pattern was executed against Blender 4.3.2 and visibly retained the requested source frames through the whole slowed output. Do not replace its negative source-strip frame_start with frame_start=1: frame_offset_start would then move the visible strip later and render black frames.\n\nReturn one JSON object only: {\"code\":\"complete executable Python source\"}.\n\nPrior executable feedback:\nBlender exit=0; output_exists=False. Tail of real Blender log:\nBlender 4.3.2 (hash 32f5fdce0a0a built 2024-12-17 02:14:25)\nTraceback (most recent call last):\n File \"/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/scripts/negative-control-attempt-1.py\", line 26, in <module>\n scene.render.image_settings.file_format = 'MPEG4'\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\nTypeError: bpy_struct: item.attr = val: enum \"MPEG4\" not found in ('BMP', 'IRIS', 'PNG', 'JPEG', 'JPEG2000', 'TARGA', 'TARGA_RAW', 'CINEON', 'DPX', 'OPEN_EXR_MULTILAYER', 'OPEN_EXR', 'HDR', 'TIFF', 'WEBP', 'FFMPEG')\n\nBlender quit"
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"content": "{\"code\": \"import bpy\\n\\n# Clear existing data\\nbpy.ops.wm.read_factory_settings(use_empty=True)\\nscene = bpy.context.scene\\n\\n# Configuration\\nINPUT_PATH = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/source.mov'\\nOUTPUT_PATH = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/negative_control.mp4'\\nFPS = 25\\nSTART_SECONDS = 0.000\\nEND_SECONDS = 3.000\\n\\n# Calculate timing variables\\nstart_frame = int(round(START_SECONDS * FPS))\\ndur_frames = max(1, int(round((END_SECONDS - START_SECONDS) * FPS)))\\nrender_dur = int(round(dur_frames * 1.5))\\n\\n# Scene settings\\nscene.frame_start = 1\\nscene.frame_end = render_dur\\nscene.render.fps = FPS\\nscene.render.fps_base = 1.0\\n\\n# Render resolution (854x480 for H.264 compatibility)\\nscene.render.resolution_x = 854\\nscene.render.resolution_y = 480\\nscene.render.resolution_percentage = 100\\n\\n# Output settings\\nscene.render.image_settings.file_format = 'FFMPEG'\\nscene.render.ffmpeg.format = 'MPEG4'\\nscene.render.ffmpeg.codec = 'H264'\\nscene.render.ffmpeg.constant_rate_factor = 'MEDIUM'\\nscene.render.ffmpeg.audio_codec = 'AAC'\\nscene.render.ffmpeg.audio_bitrate = 192\\nscene.render.ffmpeg.audio_channels = 'STEREO'\\nscene.render.ffmpeg.audio_sample_rate = 44100\\nscene.render.filepath = OUTPUT_PATH\\n\\n# Create sequence editor\\nse = scene.sequence_editor_create()\\n\\n# Add video clip\\nmovie = se.sequences.new_movie(\\n name='clip',\\n filepath=INPUT_PATH,\\n channel=1,\\n frame_start=1 - start_frame\\n)\\n\\n# Add audio track\\nsound = se.sequences.new_sound(\\n name='audio',\\n filepath=INPUT_PATH,\\n channel=2,\\n frame_start=1 - start_frame\\n)\\n\\n# Set initial trim for video and audio\\nfor strip in (movie, sound):\\n strip.frame_offset_start = start_frame\\n strip.frame_final_duration = dur_frames\\n\\n# Add slow-motion effect to video\\nspeed = se.sequences.new_effect(\\n name='slowmo',\\n type='SPEED',\\n channel=3,\\n frame_start=1,\\n frame_end=1 + dur_frames,\\n seq1=movie\\n)\\nspeed.speed_control = 'MULTIPLY'\\nspeed.speed_factor = 1 / 1.5\\nspeed.use_default_fade = False\\n\\n# Extend video duration for slow-motion\\nmovie.frame_final_duration = render_dur\\n\\n# Add subtitle with background box\\ntext = se.sequences.new_effect(\\n name='subtitle',\\n type='TEXT',\\n channel=4,\\n frame_start=1,\\n frame_end=1 + render_dur\\n)\\ntext.text = 'BIG BUNNY'\\ntext.location = (0.5, 0.12)\\ntext.align_x = 'CENTER'\\ntext.align_y = 'BOTTOM'\\ntext.font_size = 48\\ntext.use_box = True\\ntext.box_color = (0.0, 0.0, 0.0, 0.6)\\n\\n# Render animation\\nbpy.ops.render.render(animation=True)\"}"
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"content": "Generate a complete Blender 4.3 Python script for this video edit.\n\nInput movie: /Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/source.mov\nOutput MP4: /Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/negative_control.mp4\nSource FPS: 25\nSource size: 853x480; render at 854x480 (one-pixel even-width pad required by H.264)\nTrim interval: [0.000, 3.000] seconds\nEffects: slow playback so output duration is 1.5 times the trimmed interval; add bottom-centered subtitle BIG BUNNY with a visible semi-transparent dark box.\n\nRequirements:\n- Use bpy and Blender's Video Sequence Editor, including new_movie, new_sound when available, frame_offset_start/frame_final_duration, a SPEED effect, and a TEXT effect.\n- Render exactly 854x480 at 25 fps through Blender to MPEG-4 H.264 with AAC audio.\n- Set the scene frame range to the slowed duration and call bpy.ops.render.render(animation=True).\n- Create only the requested output. Do not invoke ffmpeg, subprocesses, a shell, the network, or read credentials.\n- Use APIs available in Blender 4.3 (scene.sequence_editor_create().sequences).\n- In Blender 4.3, SpeedControlSequence has no use_audio property. Never read or assign use_audio, and do not apply a SPEED effect to the sound strip. A valid movie slow-motion pattern is speed_control='MULTIPLY', speed_factor=1/1.5, and extending the movie/render duration; the sound strip may remain normally trimmed.\n- For the subtitle background, prefer the TEXT strip's use_box=True and box_color=(0,0,0,0.6); do not assume a COLOR strip has text-layout properties.\n\nUse this real-Blender-4.3-validated timing pattern, substituting the supplied paths and interval but preserving the timing relationships exactly:\n```\nFPS = 25\nstart_frame = int(round(START_SECONDS * FPS))\ndur_frames = max(1, int(round((END_SECONDS - START_SECONDS) * FPS)))\nrender_dur = int(round(dur_frames * 1.5))\nse = scene.sequence_editor_create()\nmovie = se.sequences.new_movie(name='clip', filepath=INPUT_PATH, channel=1,\n frame_start=1 - start_frame)\nsound = se.sequences.new_sound(name='audio', filepath=INPUT_PATH, channel=2,\n frame_start=1 - start_frame)\nfor strip in (movie, sound):\n strip.frame_offset_start = start_frame\n strip.frame_final_duration = dur_frames\nspeed = se.sequences.new_effect(name='slowmo', type='SPEED', channel=3,\n frame_start=1, frame_end=1 + dur_frames, seq1=movie)\nspeed.use_default_fade = False\nspeed.speed_control = 'MULTIPLY'\nspeed.speed_factor = 1.0 / 1.5\nmovie.frame_final_duration = render_dur\ntext = se.sequences.new_effect(name='subtitle', type='TEXT', channel=4,\n frame_start=1, frame_end=1 + render_dur)\ntext.text = 'BIG BUNNY'; text.location = (0.5, 0.12)\ntext.align_x = 'CENTER'; text.align_y = 'BOTTOM'\ntext.use_box = True; text.box_color = (0.0, 0.0, 0.0, 0.6)\nscene.frame_start = 1; scene.frame_end = render_dur\n```\nThis pattern was executed against Blender 4.3.2 and visibly retained the requested source frames through the whole slowed output. Do not replace its negative source-strip frame_start with frame_start=1: frame_offset_start would then move the visible strip later and render black frames.\n\nReturn one JSON object only: {\"code\":\"complete executable Python source\"}.\n\nPrior executable feedback:\nBlender exit=0; output_exists=False. Tail of real Blender log:\nBlender 4.3.2 (hash 32f5fdce0a0a built 2024-12-17 02:14:25)\nTraceback (most recent call last):\n File \"/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/scripts/negative-control-attempt-2.py\", line 38, in <module>\n scene.render.ffmpeg.audio_sample_rate = 44100\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\nAttributeError: 'FFmpegSettings' object has no attribute 'audio_sample_rate'\n\nBlender quit"
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"content": "{\"code\": \"import bpy\\n\\n# Configuration\\nINPUT_PATH = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/source.mov'\\nOUTPUT_PATH = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/negative_control.mp4'\\nFPS = 25\\nSTART_SECONDS = 0.000\\nEND_SECONDS = 3.000\\n\\n# Calculate timing variables\\nstart_frame = int(round(START_SECONDS * FPS))\\ndur_frames = max(1, int(round((END_SECONDS - START_SECONDS) * FPS)))\\nrender_dur = int(round(dur_frames * 1.5))\\n\\n# Scene setup\\nscene = bpy.context.scene\\nscene.sequence_editor_clear() # Ensure clean state\\nse = scene.sequence_editor_create()\\n\\n# Add movie and audio strips\\nmovie = se.sequences.new_movie(\\n name='clip',\\n filepath=INPUT_PATH,\\n channel=1,\\n frame_start=1 - start_frame\\n)\\nsound = se.sequences.new_sound(\\n name='audio',\\n filepath=INPUT_PATH,\\n channel=2,\\n frame_start=1 - start_frame\\n)\\n\\n# Set trim for both strips\\nfor strip in (movie, sound):\\n strip.frame_offset_start = start_frame\\n strip.frame_final_duration = dur_frames\\n\\n# Add speed effect for slow motion\\nspeed = se.sequences.new_effect(\\n name='slowmo',\\n type='SPEED',\\n channel=3,\\n frame_start=1,\\n frame_end=1 + dur_frames,\\n seq1=movie\\n)\\nspeed.use_default_fade = False\\nspeed.speed_control = 'MULTIPLY'\\nspeed.speed_factor = 1.0 / 1.5\\nmovie.frame_final_duration = render_dur # Extend video to render duration\\n\\n# Add subtitle text strip\\ntext = se.sequences.new_effect(\\n name='subtitle',\\n type='TEXT',\\n channel=4,\\n frame_start=1,\\n frame_end=1 + render_dur\\n)\\ntext.text = 'BIG BUNNY'\\ntext.location = (0.5, 0.12) # Center horizontally, near bottom vertically\\ntext.align_x = 'CENTER'\\ntext.align_y = 'BOTTOM'\\ntext.use_box = True\\ntext.box_color = (0.0, 0.0, 0.0, 0.6) # Black semi-transparent background\\n\\n# Render settings\\nscene.frame_start = 1\\nscene.frame_end = render_dur\\nscene.render.fps = FPS\\nscene.render.fps_base = 1.0\\nscene.render.resolution_x = 854\\nscene.render.resolution_y = 480\\nscene.render.resolution_percentage = 100\\nscene.render.image_settings.file_format = 'FFMPEG'\\nscene.render.ffmpeg.format = 'MPEG4'\\nscene.render.ffmpeg.codec = 'H264'\\nscene.render.ffmpeg.audio_codec = 'AAC'\\nscene.render.filepath = OUTPUT_PATH\\n\\n# Execute render\\nbpy.ops.render.render(animation=True)\"}"
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"content": "Generate a complete Blender 4.3 Python script for this video edit.\n\nInput movie: /Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/source.mov\nOutput MP4: /Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/final.mp4\nSource FPS: 25\nSource size: 853x480; render at 854x480 (one-pixel even-width pad required by H.264)\nTrim interval: [9.000, 12.000] seconds\nEffects: slow playback so output duration is 1.5 times the trimmed interval; add bottom-centered subtitle BIG BUNNY with a visible semi-transparent dark box.\n\nRequirements:\n- Use bpy and Blender's Video Sequence Editor, including new_movie, new_sound when available, frame_offset_start/frame_final_duration, a SPEED effect, and a TEXT effect.\n- Render exactly 854x480 at 25 fps through Blender to MPEG-4 H.264 with AAC audio.\n- Set the scene frame range to the slowed duration and call bpy.ops.render.render(animation=True).\n- Create only the requested output. Do not invoke ffmpeg, subprocesses, a shell, the network, or read credentials.\n- Use APIs available in Blender 4.3 (scene.sequence_editor_create().sequences).\n- In Blender 4.3, SpeedControlSequence has no use_audio property. Never read or assign use_audio, and do not apply a SPEED effect to the sound strip. A valid movie slow-motion pattern is speed_control='MULTIPLY', speed_factor=1/1.5, and extending the movie/render duration; the sound strip may remain normally trimmed.\n- For the subtitle background, prefer the TEXT strip's use_box=True and box_color=(0,0,0,0.6); do not assume a COLOR strip has text-layout properties.\n\nUse this real-Blender-4.3-validated timing pattern, substituting the supplied paths and interval but preserving the timing relationships exactly:\n```\nFPS = 25\nstart_frame = int(round(START_SECONDS * FPS))\ndur_frames = max(1, int(round((END_SECONDS - START_SECONDS) * FPS)))\nrender_dur = int(round(dur_frames * 1.5))\nse = scene.sequence_editor_create()\nmovie = se.sequences.new_movie(name='clip', filepath=INPUT_PATH, channel=1,\n frame_start=1 - start_frame)\nsound = se.sequences.new_sound(name='audio', filepath=INPUT_PATH, channel=2,\n frame_start=1 - start_frame)\nfor strip in (movie, sound):\n strip.frame_offset_start = start_frame\n strip.frame_final_duration = dur_frames\nspeed = se.sequences.new_effect(name='slowmo', type='SPEED', channel=3,\n frame_start=1, frame_end=1 + dur_frames, seq1=movie)\nspeed.use_default_fade = False\nspeed.speed_control = 'MULTIPLY'\nspeed.speed_factor = 1.0 / 1.5\nmovie.frame_final_duration = render_dur\ntext = se.sequences.new_effect(name='subtitle', type='TEXT', channel=4,\n frame_start=1, frame_end=1 + render_dur)\ntext.text = 'BIG BUNNY'; text.location = (0.5, 0.12)\ntext.align_x = 'CENTER'; text.align_y = 'BOTTOM'\ntext.use_box = True; text.box_color = (0.0, 0.0, 0.0, 0.6)\nscene.frame_start = 1; scene.frame_end = render_dur\n```\nThis pattern was executed against Blender 4.3.2 and visibly retained the requested source frames through the whole slowed output. Do not replace its negative source-strip frame_start with frame_start=1: frame_offset_start would then move the visible strip later and render black frames.\n\nReturn one JSON object only: {\"code\":\"complete executable Python source\"}.\n"
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"content": "{\"code\": \"import bpy\\n\\n# Configuration\\nINPUT_PATH = \\\"/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/source.mov\\\"\\nOUTPUT_PATH = \\\"/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/final.mp4\\\"\\nFPS = 25\\nSTART_SECONDS = 9.000\\nEND_SECONDS = 12.000\\n\\n# Timing calculations\\nstart_frame = int(round(START_SECONDS * FPS))\\ndur_frames = max(1, int(round((END_SECONDS - START_SECONDS) * FPS)))\\nrender_dur = int(round(dur_frames * 1.5))\\n\\n# Scene setup\\nscene = bpy.context.scene\\n\\n# Render settings\\nscene.render.resolution_x = 854\\nscene.render.resolution_y = 480\\nscene.render.resolution_percentage = 100\\nscene.render.fps = FPS\\nscene.render.fps_base = 1.0\\nscene.render.image_settings.file_format = 'FFMPEG'\\nscene.render.ffmpeg.format = 'MPEG4'\\nscene.render.ffmpeg.codec = 'H264'\\nscene.render.ffmpeg.audio_codec = 'AAC'\\nscene.render.filepath = OUTPUT_PATH\\n\\n# Sequence Editor setup\\nse = scene.sequence_editor_create()\\n\\n# Video track\\nmovie = se.sequences.new_movie(\\n name='clip',\\n filepath=INPUT_PATH,\\n channel=1,\\n frame_start=1 - start_frame\\n)\\n\\n# Audio track\\nsound = se.sequences.new_sound(\\n name='audio',\\n filepath=INPUT_PATH,\\n channel=2,\\n frame_start=1 - start_frame\\n)\\n\\n# Trim media to interval\\nfor strip in (movie, sound):\\n strip.frame_offset_start = start_frame\\n strip.frame_final_duration = dur_frames\\n\\n# Slow motion effect\\nspeed = se.sequences.new_effect(\\n name='slowmo',\\n type='SPEED',\\n channel=3,\\n frame_start=1,\\n frame_end=1 + dur_frames,\\n seq1=movie\\n)\\nspeed.speed_control = 'MULTIPLY'\\nspeed.speed_factor = 1 / 1.5\\nspeed.use_default_fade = False\\nmovie.frame_final_duration = render_dur\\n\\n# Subtitle with background\\ntext = se.sequences.new_effect(\\n name='subtitle',\\n type='TEXT',\\n channel=4,\\n frame_start=1,\\n frame_end=1 + render_dur\\n)\\ntext.text = 'BIG BUNNY'\\ntext.location = (0.5, 0.12)\\ntext.align_x = 'CENTER'\\ntext.align_y = 'BOTTOM'\\ntext.use_box = True\\ntext.box_color = (0, 0, 0, 0.6)\\n\\n# Render range\\nscene.frame_start = 1\\nscene.frame_end = render_dur\\n\\n# Execute render\\nbpy.ops.render.render(animation=True)\"}"
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"r_frame_rate": "25/1"
},
{
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"r_frame_rate": "0/0"
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"size": "441102"
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}
}
@@ -0,0 +1,88 @@
import bpy
# Configuration
INPUT_PATH = "/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/source.mov"
OUTPUT_PATH = "/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/final.mp4"
FPS = 25
START_SECONDS = 9.000
END_SECONDS = 12.000
# Timing calculations
start_frame = int(round(START_SECONDS * FPS))
dur_frames = max(1, int(round((END_SECONDS - START_SECONDS) * FPS)))
render_dur = int(round(dur_frames * 1.5))
# Scene setup
scene = bpy.context.scene
# Render settings
scene.render.resolution_x = 854
scene.render.resolution_y = 480
scene.render.resolution_percentage = 100
scene.render.fps = 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_PATH
# Sequence Editor setup
se = scene.sequence_editor_create()
# Video track
movie = se.sequences.new_movie(
name='clip',
filepath=INPUT_PATH,
channel=1,
frame_start=1 - start_frame
)
# Audio track
sound = se.sequences.new_sound(
name='audio',
filepath=INPUT_PATH,
channel=2,
frame_start=1 - start_frame
)
# Trim media to interval
for strip in (movie, sound):
strip.frame_offset_start = start_frame
strip.frame_final_duration = dur_frames
# Slow motion effect
speed = se.sequences.new_effect(
name='slowmo',
type='SPEED',
channel=3,
frame_start=1,
frame_end=1 + dur_frames,
seq1=movie
)
speed.speed_control = 'MULTIPLY'
speed.speed_factor = 1 / 1.5
speed.use_default_fade = False
movie.frame_final_duration = render_dur
# Subtitle with background
text = se.sequences.new_effect(
name='subtitle',
type='TEXT',
channel=4,
frame_start=1,
frame_end=1 + render_dur
)
text.text = 'BIG BUNNY'
text.location = (0.5, 0.12)
text.align_x = 'CENTER'
text.align_y = 'BOTTOM'
text.use_box = True
text.box_color = (0, 0, 0, 0.6)
# Render range
scene.frame_start = 1
scene.frame_end = render_dur
# Execute render
bpy.ops.render.render(animation=True)
@@ -0,0 +1,89 @@
import bpy
# Configuration
INPUT_PATH = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/source.mov'
OUTPUT_PATH = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/negative_control.mp4'
START_SECONDS = 0.000
END_SECONDS = 3.000
FPS = 25
# Calculate timing parameters
start_frame = int(round(START_SECONDS * FPS))
dur_frames = max(1, int(round((END_SECONDS - START_SECONDS) * FPS)))
render_dur = int(round(dur_frames * 1.5))
# Initialize scene
scene = bpy.context.scene
scene.sequence_editor_clear()
# Render settings
scene.render.resolution_x = 854
scene.render.resolution_y = 480
scene.render.resolution_percentage = 100
scene.render.fps = FPS
scene.render.fps_base = 1.0
scene.render.filepath = OUTPUT_PATH
scene.render.image_settings.file_format = 'MPEG4'
scene.render.ffmpeg.format = 'MPEG4'
scene.render.ffmpeg.codec = 'H264'
scene.render.ffmpeg.audio_codec = 'AAC'
# Video Sequence Editor setup
se = scene.sequence_editor_create()
# Add movie and audio strips
movie = se.sequences.new_movie(
name='clip',
filepath=INPUT_PATH,
channel=1,
frame_start=1 - start_frame
)
sound = se.sequences.new_sound(
name='audio',
filepath=INPUT_PATH,
channel=2,
frame_start=1 - start_frame
)
# Set trim for both media strips
for strip in (movie, sound):
strip.frame_offset_start = start_frame
strip.frame_final_duration = dur_frames
# Add speed effect for slow motion
speed = se.sequences.new_effect(
name='slowmo',
type='SPEED',
channel=3,
frame_start=1,
frame_end=1 + dur_frames,
seq1=movie
)
speed.speed_control = 'MULTIPLY'
speed.speed_factor = 1 / 1.5
speed.use_default_fade = False
# Extend movie strip to match render duration
movie.frame_final_duration = render_dur
# Add subtitle text strip
text = se.sequences.new_effect(
name='subtitle',
type='TEXT',
channel=4,
frame_start=1,
frame_end=1 + render_dur
)
text.text = 'BIG BUNNY'
text.location = (0.5, 0.12)
text.align_x = 'CENTER'
text.align_y = 'BOTTOM'
text.use_box = True
text.box_color = (0, 0, 0, 0.6)
# Set render frame range
scene.frame_start = 1
scene.frame_end = render_dur
# Render animation
bpy.ops.render.render(animation=True)
@@ -0,0 +1,98 @@
import bpy
# Clear existing data
bpy.ops.wm.read_factory_settings(use_empty=True)
scene = bpy.context.scene
# Configuration
INPUT_PATH = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/source.mov'
OUTPUT_PATH = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/negative_control.mp4'
FPS = 25
START_SECONDS = 0.000
END_SECONDS = 3.000
# Calculate timing variables
start_frame = int(round(START_SECONDS * FPS))
dur_frames = max(1, int(round((END_SECONDS - START_SECONDS) * FPS)))
render_dur = int(round(dur_frames * 1.5))
# Scene settings
scene.frame_start = 1
scene.frame_end = render_dur
scene.render.fps = FPS
scene.render.fps_base = 1.0
# Render resolution (854x480 for H.264 compatibility)
scene.render.resolution_x = 854
scene.render.resolution_y = 480
scene.render.resolution_percentage = 100
# Output settings
scene.render.image_settings.file_format = 'FFMPEG'
scene.render.ffmpeg.format = 'MPEG4'
scene.render.ffmpeg.codec = 'H264'
scene.render.ffmpeg.constant_rate_factor = 'MEDIUM'
scene.render.ffmpeg.audio_codec = 'AAC'
scene.render.ffmpeg.audio_bitrate = 192
scene.render.ffmpeg.audio_channels = 'STEREO'
scene.render.ffmpeg.audio_sample_rate = 44100
scene.render.filepath = OUTPUT_PATH
# Create sequence editor
se = scene.sequence_editor_create()
# Add video clip
movie = se.sequences.new_movie(
name='clip',
filepath=INPUT_PATH,
channel=1,
frame_start=1 - start_frame
)
# Add audio track
sound = se.sequences.new_sound(
name='audio',
filepath=INPUT_PATH,
channel=2,
frame_start=1 - start_frame
)
# Set initial trim for video and audio
for strip in (movie, sound):
strip.frame_offset_start = start_frame
strip.frame_final_duration = dur_frames
# Add slow-motion effect to video
speed = se.sequences.new_effect(
name='slowmo',
type='SPEED',
channel=3,
frame_start=1,
frame_end=1 + dur_frames,
seq1=movie
)
speed.speed_control = 'MULTIPLY'
speed.speed_factor = 1 / 1.5
speed.use_default_fade = False
# Extend video duration for slow-motion
movie.frame_final_duration = render_dur
# Add subtitle with background box
text = se.sequences.new_effect(
name='subtitle',
type='TEXT',
channel=4,
frame_start=1,
frame_end=1 + render_dur
)
text.text = 'BIG BUNNY'
text.location = (0.5, 0.12)
text.align_x = 'CENTER'
text.align_y = 'BOTTOM'
text.font_size = 48
text.use_box = True
text.box_color = (0.0, 0.0, 0.0, 0.6)
# Render animation
bpy.ops.render.render(animation=True)
@@ -0,0 +1,83 @@
import bpy
# Configuration
INPUT_PATH = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/source.mov'
OUTPUT_PATH = '/Users/boj/book/ai-agent-book/chapter5/video-edit/validation/runs/exp5-6-real-blender-20260730-053948/negative_control.mp4'
FPS = 25
START_SECONDS = 0.000
END_SECONDS = 3.000
# Calculate timing variables
start_frame = int(round(START_SECONDS * FPS))
dur_frames = max(1, int(round((END_SECONDS - START_SECONDS) * FPS)))
render_dur = int(round(dur_frames * 1.5))
# Scene setup
scene = bpy.context.scene
scene.sequence_editor_clear() # Ensure clean state
se = scene.sequence_editor_create()
# Add movie and audio strips
movie = se.sequences.new_movie(
name='clip',
filepath=INPUT_PATH,
channel=1,
frame_start=1 - start_frame
)
sound = se.sequences.new_sound(
name='audio',
filepath=INPUT_PATH,
channel=2,
frame_start=1 - start_frame
)
# Set trim for both strips
for strip in (movie, sound):
strip.frame_offset_start = start_frame
strip.frame_final_duration = dur_frames
# Add speed effect for slow motion
speed = se.sequences.new_effect(
name='slowmo',
type='SPEED',
channel=3,
frame_start=1,
frame_end=1 + dur_frames,
seq1=movie
)
speed.use_default_fade = False
speed.speed_control = 'MULTIPLY'
speed.speed_factor = 1.0 / 1.5
movie.frame_final_duration = render_dur # Extend video to render duration
# Add subtitle text strip
text = se.sequences.new_effect(
name='subtitle',
type='TEXT',
channel=4,
frame_start=1,
frame_end=1 + render_dur
)
text.text = 'BIG BUNNY'
text.location = (0.5, 0.12) # Center horizontally, near bottom vertically
text.align_x = 'CENTER'
text.align_y = 'BOTTOM'
text.use_box = True
text.box_color = (0.0, 0.0, 0.0, 0.6) # Black semi-transparent background
# Render settings
scene.frame_start = 1
scene.frame_end = render_dur
scene.render.fps = FPS
scene.render.fps_base = 1.0
scene.render.resolution_x = 854
scene.render.resolution_y = 480
scene.render.resolution_percentage = 100
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_PATH
# Execute render
bpy.ops.render.render(animation=True)
@@ -0,0 +1,42 @@
{
"url": "https://download.blender.org/peach/trailer/trailer_480p.mov",
"title": "Big Buck Bunny trailer (Blender Foundation Peach Open Movie Project)",
"license": "Creative Commons Attribution 3.0",
"license_url": "https://creativecommons.org/licenses/by/3.0/",
"sha256": "36801b74638c12be9aa587e93cd18edfc9bc51a1c089ab2a19ee42beed9f497d",
"probe": {
"programs": [],
"stream_groups": [],
"streams": [
{
"index": 0,
"codec_name": "h264",
"codec_type": "video",
"width": 853,
"height": 480,
"r_frame_rate": "25/1"
},
{
"index": 1,
"codec_name": "aac",
"codec_type": "audio",
"sample_rate": "48000",
"channels": 6,
"r_frame_rate": "0/0"
}
],
"format": {
"format_name": "mov,mp4,m4a,3gp,3g2,mj2",
"duration": "32.995000",
"size": "11061011"
}
},
"naturally_occurring_scenes": true,
"ground_truth": {
"start": 9.08,
"end": 11.2,
"target": "the single continuous shot showing the large white rabbit walking alone in a sunny green meadow, after the ONE BIG RABBIT title and before the THREE RODENTS title",
"method": "Human-labeled target shot bounded by ffmpeg scene-change frames; source inspection found transitions at 9.08 and 11.20 seconds.",
"ffmpeg_scene_threshold": 0.35
}
}