Repository Analysis

Zulko/moviepy

Video editing with Python

12.8 Low AI signal View on GitHub

Analysis Overview

This report presents the forensic synthetic code analysis of Zulko/moviepy, a Python project with 14,870 GitHub stars. SynthScan v2.0 examined 21,566 lines of code across 162 source files, recording 243 pattern matches distributed across 13 syntactic categories. The overall adjusted score of 12.8 places this repository in the Low AI signal band.

The scanner applied 160+ deterministic lexical heuristics, multi-line block detectors, abstract syntax tree depth profilers, and a cross-file Jaccard similarity matrix to construct a statistically normalised synthetic code estimate. All matches are individually weighted by severity coefficient and contextual multiplier before summation, and the resulting headline score is temporally discounted to account for the repository's development history relative to the commercial emergence of large language model coding tooling (November 2022 onward).

12.8
Adjusted Score
12.8
Raw Score
100%
Time Factor
2026-08-26
Last Push
14.9K
Stars
Python
Language
21.6K
Lines of Code
162
Files
243
Pattern Hits
2026-08-29
Scan Date
0.02
HC Hit Rate

What These Metrics Mean

Adjusted Score
Primary synthetic code indicator. Raw score normalised per 1,000 lines of code and multiplied by the temporal discount factor. This is the definitive comparative metric — use it to rank repositories by AI authorship density.
Raw Score
The unmodified sum of all severity-weighted, context-multiplied pattern match scores before temporal discounting. Reflects the absolute signal strength independent of when the repository was last active.
Time Factor
The temporal discount multiplier (0–100%) applied to the raw score. Repositories last updated before ChatGPT's launch (Nov 2022) receive a 5% factor. Full signal is only assigned to repositories active in the post-adoption era (Jan 2024+).
Pattern Hits
Total count of individual pattern matches across all files and categories. A high hit count with a low score may indicate a very large codebase with isolated AI snippets; a low count with a high score indicates dense, concentrated AI signatures.
HC Hit Rate
High+Critical pattern hits per file, averaged across the repository. This orthogonal signal catches repositories where a few files are densely packed with high-severity AI tells — a strong indicator even when the normalised score appears moderate due to codebase size.
Lines of Code / Files
Total lines and files analysed. The scanner examines 94 file extensions. These denominators are used to normalise the score, enabling fair comparison between repositories of vastly different sizes.

Score History

Longitudinal tracking requires multiple scan runs. Once this repository is re-scanned after new commits land, this chart will visualise how the synthetic code signal evolves over time — enabling you to detect whether AI authorship is growing, stabilising, or being actively corrected by human engineers.

No multi-scan history yet — run the scanner again to build trend data.

Severity Breakdown

Classifies detected patterns by their diagnostic confidence and structural impact. CRITICAL patterns (coefficient 10) represent definitive synthetic signatures — hallucinated imports, explicit LLM attribution metadata — virtually never produced by human authors. HIGH (5) indicates strong structural tells such as cross-file repetition or cross-linguistic idioms. MEDIUM (2) covers recognisable conversational padding and AI-specific vocabulary. LOW (1) captures subtle indicators like tautological comments and generic boilerplate that require density to carry independent signal.

CRITICAL 0HIGH 4MEDIUM 14LOW 225

Directory Score Breakdown

This horizontal bar chart decomposes the repository's raw synthetic code score by top-level directory, allowing you to pinpoint precisely which modules or components carry the highest AI authorship density. Directories with disproportionately high scores relative to their size warrant targeted manual review: concentrated AI signatures often trace back to mass-generated configuration layers, auto-ported test suites, LLM-scaffolded boilerplate classes, or entire subsystems authored under heavy copilot assistance. Use this view to prioritise your human code-review effort.

Pattern Findings

The scanner identified 243 distinct pattern matches across 13 syntactic categories. Each entry below represents a discrete location in the source code where the engine recorded a statistically significant AI authorship indicator. Expand any category row to inspect the individual file paths, line numbers, code snippets, and the lexical context (CODE, COMMENT, or STRING) in which each match was detected.

Reading the findings table: The Severity column indicates the diagnostic confidence level (CRITICAL / HIGH / MEDIUM / LOW). The Context column identifies whether the match occurred inside executable code, an inline comment, or a string literal — comment-context matches receive a ×1.5 weight because LLMs systematically over-annotate. The ⚡ bolt icon marks clustered matches: three or more patterns within a 10-line window, each receiving an additional ×1.5 density multiplier as dense clusters constitute far stronger evidence of synthetic authorship than isolated hits.

Unused Imports86 hits · 78 pts
SeverityFileLineSnippetContext
LOWtests/test_VideoClip.py11CODE
LOWtests/test_videotools.py13CODE
LOWtests/test_compositing.py9CODE
LOWtests/test_TextClip.py9CODE
LOWtests/test_ffmpeg_writer.py10CODE
LOWtests/test_issues.py9CODE
LOWtests/test_PR.py8CODE
LOWtests/test_fx.py14CODE
LOWmoviepy/__init__.py5CODE
LOWmoviepy/__init__.py6CODE
LOWmoviepy/__init__.py6CODE
LOWmoviepy/__init__.py6CODE
LOWmoviepy/__init__.py12CODE
LOWmoviepy/__init__.py13CODE
LOWmoviepy/__init__.py14CODE
LOWmoviepy/__init__.py15CODE
LOWmoviepy/__init__.py16CODE
LOWmoviepy/__init__.py16CODE
LOWmoviepy/__init__.py17CODE
LOWmoviepy/__init__.py17CODE
LOWmoviepy/__init__.py17CODE
LOWmoviepy/__init__.py22CODE
LOWmoviepy/__init__.py24CODE
LOWmoviepy/__init__.py25CODE
LOWmoviepy/__init__.py26CODE
LOWmoviepy/__init__.py26CODE
LOWmoviepy/__init__.py26CODE
LOWmoviepy/__init__.py26CODE
LOWmoviepy/__init__.py26CODE
LOWmoviepy/__init__.py26CODE
LOWmoviepy/Clip.py16CODE
LOWmoviepy/video/VideoClip.py23CODE
LOWmoviepy/video/fx/__init__.py5CODE
LOWmoviepy/video/fx/__init__.py6CODE
LOWmoviepy/video/fx/__init__.py7CODE
LOWmoviepy/video/fx/__init__.py8CODE
LOWmoviepy/video/fx/__init__.py9CODE
LOWmoviepy/video/fx/__init__.py10CODE
LOWmoviepy/video/fx/__init__.py11CODE
LOWmoviepy/video/fx/__init__.py12CODE
LOWmoviepy/video/fx/__init__.py13CODE
LOWmoviepy/video/fx/__init__.py14CODE
LOWmoviepy/video/fx/__init__.py15CODE
LOWmoviepy/video/fx/__init__.py16CODE
LOWmoviepy/video/fx/__init__.py17CODE
LOWmoviepy/video/fx/__init__.py18CODE
LOWmoviepy/video/fx/__init__.py19CODE
LOWmoviepy/video/fx/__init__.py20CODE
LOWmoviepy/video/fx/__init__.py21CODE
LOWmoviepy/video/fx/__init__.py22CODE
LOWmoviepy/video/fx/__init__.py23CODE
LOWmoviepy/video/fx/__init__.py24CODE
LOWmoviepy/video/fx/__init__.py25CODE
LOWmoviepy/video/fx/__init__.py26CODE
LOWmoviepy/video/fx/__init__.py27CODE
LOWmoviepy/video/fx/__init__.py28CODE
LOWmoviepy/video/fx/__init__.py29CODE
LOWmoviepy/video/fx/__init__.py30CODE
LOWmoviepy/video/fx/__init__.py31CODE
LOWmoviepy/video/fx/__init__.py32CODE
26 more matches not shown…
Hyper-Verbose Identifiers71 hits · 69 pts
SeverityFileLineSnippetContext
LOWtests/test_VideoClip.py77def test_write_frame_errors_with_redirected_logs(util, video):CODE
LOWtests/test_VideoClip.py97def test_write_videofiles_with_temp_audiofile_path(util):CODE
LOWtests/test_VideoClip.py109def test_write_videofiles_audio_codec_error(util, video):CODE
LOWtests/test_VideoClip.py189def test_write_image_sequence(util, video):CODE
LOWtests/test_VideoClip.py245def test_setaudio_with_audiofile(util):CODE
LOWtests/test_VideoClip.py281def test_compositing_with_same_layers():CODE
LOWtests/test_VideoClip.py306def test_setfps_withoutchangeduration(video):CODE
LOWtests/test_VideoClip.py318def test_setfps_withchangeduration(video):CODE
LOWtests/test_VideoClip.py330def test_copied_videoclip_write_videofile(util):CODE
LOWtests/test_videotools.py1077def test_ipython_display_not_available():STRING
LOWtests/conftest.py81def get_functions_with_decorator_defined(code, decorator_name):CODE
LOWtests/conftest.py178def functions_with_decorator_defined():CODE
LOWtests/test_compositing.py47def test_clips_array_duration(util):CODE
LOWtests/test_compositing.py78def test_concatenate_floating_point(util):CODE
LOWtests/test_compositing.py142def test_compositing_with_transparency_colors(util):CODE
LOWtests/test_compositing.py300def test_concatenate_with_masks(util):CODE
LOWtests/test_SubtitlesClip.py63def test_file_to_subtitles_unicode():CODE
LOWtests/test_ffmpeg_reader.py52def test_ffmpeg_parse_infos_video_nframes():CODE
LOWtests/test_ffmpeg_reader.py60def test_ffmpeg_parse_infos_no_default_stream(util):CODE
LOWtests/test_ffmpeg_reader.py103def test_ffmpeg_parse_infos_decode_file(decode_file, expected_duration):CODE
LOWtests/test_ffmpeg_reader.py136def test_ffmpeg_parse_infos_multiple_audio_streams(util, mono_wave):CODE
LOWtests/test_ffmpeg_reader.py204def test_ffmpeg_parse_infos_metadata(util, mono_wave):CODE
LOWtests/test_ffmpeg_reader.py258 def get_value_from_dict_using_lower_key(field, dictionary):CODE
LOWtests/test_ffmpeg_reader.py292def test_ffmpeg_parse_infos_chapters():CODE
LOWtests/test_ffmpeg_reader.py309def test_ffmpeg_parse_infos_metadata_with_attached_pic():CODE
LOWtests/test_ffmpeg_reader.py330def test_ffmpeg_parse_video_rotation():CODE
LOWtests/test_ffmpeg_reader.py336def test_correct_video_rotation(util):CODE
LOWtests/test_ffmpeg_reader.py351def test_ffmpeg_parse_infos_multiline_metadata():CODE
LOWtests/test_ffmpeg_reader.py520def test_not_default_audio_stream_audio_bitrate():CODE
LOWtests/test_ffmpeg_reader.py557def test_stream_square_brackets():CODE
LOWtests/test_ffmpeg_reader.py573def test_stream_square_brackets_and_language():CODE
LOWtests/test_ffmpeg_reader.py589def test_stream_missing_audio_bitrate():CODE
LOWtests/test_ffmpeg_reader.py605def test_sequential_frame_pos():CODE
LOWtests/test_ffmpeg_reader.py634def test_unusual_order_frame_pos():CODE
LOWtests/test_ffmpeg_reader.py659def test_large_skip_frame_pos():CODE
LOWtests/test_ffmpeg_reader.py675def test_large_small_skip_equal():CODE
LOWtests/test_ffmpeg_reader.py704def test_seeking_beyond_file_end():CODE
LOWtests/test_ffmpeg_reader.py724def test_release_of_file_via_close(util):CODE
LOWtests/test_ffmpeg_reader.py759def test_failure_to_release_file(util):CODE
LOWtests/test_ffmpeg_reader.py817def test_read_transparent_video():CODE
LOWtests/test_ffmpeg_reader.py533def test_stream_deidentation_not_raises_error():STRING
LOWtests/test_TextClip.py23def test_text_filename_arguments_consistence(util):CODE
LOWtests/test_TextClip.py64def test_no_text_nor_filename_arguments(method, util):CODE
LOWtests/test_ffmpeg_writer.py258def test_write_file_with_spaces(util):CODE
LOWtests/test_VideoFileClip.py50def test_copied_videofileclip_write_videofile(util):CODE
LOWtests/test_VideoFileClip.py71def test_videofileclip_safe_deepcopy(monkeypatch):CODE
LOWtests/test_VideoFileClip.py89def test_ffmpeg_transparency_mask(util):CODE
LOWtests/test_VideoFileClip.py104def test_no_duration_raise_io_error():CODE
LOWtests/test_VideoFileClip.py112def test_no_duration_re_encode_can_be_opened(util):CODE
LOWtests/test_ffmpeg_tools.py17def test_ffmpeg_extract_subclip(util):CODE
LOWtests/test_ffmpeg_tools.py77def test_ffmpeg_stabilize_video(util):CODE
LOWtests/test_tools.py30def test_find_extensions_not_found():CODE
LOWtests/test_tools.py78def test_ffmpeg_escape_filename(given, expected):CODE
LOWtests/test_tools.py86def test_cross_platform_popen_params(os_name, monkeypatch):CODE
LOWtests/test_tools.py95def test_deprecated_version_of(old_name):CODE
LOWtests/test_tools.py189def test_decorators_argument_converters_consistency(CODE
LOWtests/test_AudioClips.py54def test_concatenate_audioclips_render(util, mono_wave):CODE
LOWtests/test_AudioClips.py147def test_concatenate_audioclip_with_audiofileclip(util, stereo_wave):CODE
LOWtests/test_AudioClips.py164def test_concatenate_audiofileclips(util):CODE
LOWtests/test_AudioClips.py179def test_audioclip_mono_max_volume(mono_wave):CODE
11 more matches not shown…
Deep Nesting27 hits · 27 pts
SeverityFileLineSnippetContext
LOWtests/conftest.py81CODE
LOWtests/conftest.py101CODE
LOWtests/test_compositing.py182CODE
LOWtests/test_compositing.py244CODE
LOWtests/test_tools.py189CODE
LOWtests/test_fx.py22CODE
LOWtests/test_fx.py738CODE
LOWmoviepy/video/VideoClip.py1436CODE
LOWmoviepy/video/VideoClip.py1534CODE
LOWmoviepy/video/tools/subtitles.py177CODE
LOWmoviepy/video/tools/drawing.py177CODE
LOWmoviepy/video/tools/credits.py79CODE
LOWmoviepy/video/tools/cuts.py201CODE
LOWmoviepy/video/fx/Resize.py58CODE
LOWmoviepy/video/fx/Rotate.py162CODE
LOWmoviepy/video/fx/Rotate.py180CODE
LOWmoviepy/video/io/ffplay_previewer.py91CODE
LOWmoviepy/video/io/ffmpeg_writer.py262CODE
LOWmoviepy/video/io/ffmpeg_writer.py181CODE
LOWmoviepy/video/io/ffmpeg_reader.py23CODE
LOWmoviepy/video/io/ffmpeg_reader.py411CODE
LOWmoviepy/video/io/ffmpeg_reader.py464CODE
LOWmoviepy/video/io/ffmpeg_reader.py676CODE
LOWmoviepy/video/io/ffmpeg_reader.py739CODE
LOWmoviepy/video/io/display_in_notebook.py54CODE
LOWmoviepy/audio/io/ffplay_audiopreviewer.py113CODE
LOWmoviepy/audio/io/ffmpeg_audiowriter.py108CODE
Cross-File Repetition4 hits · 20 pts
SeverityFileLineSnippetContext
HIGHmoviepy/video/io/ffplay_previewer.py0closes the writer, terminating the subprocess if is still alive.STRING
HIGHmoviepy/video/io/ffmpeg_writer.py0closes the writer, terminating the subprocess if is still alive.STRING
HIGHmoviepy/audio/io/ffplay_audiopreviewer.py0closes the writer, terminating the subprocess if is still alive.STRING
HIGHmoviepy/audio/io/ffmpeg_audiowriter.py0closes the writer, terminating the subprocess if is still alive.STRING
Decorative Section Separators6 hits · 18 pts
SeverityFileLineSnippetContext
MEDIUMmoviepy/video/VideoClip.py169 # ===============================================================COMMENT
MEDIUMmoviepy/video/VideoClip.py527 # ===============================================================COMMENT
MEDIUMmoviepy/video/VideoClip.py640 # -----------------------------------------------------------------COMMENT
MEDIUMmoviepy/video/VideoClip.py682 # --------------------------------------------------------------COMMENT
MEDIUMmoviepy/video/VideoClip.py1208 # --------------------------------------------------------------COMMENT
MEDIUMmoviepy/video/VideoClip.py1243 # ----------------------------------------------------------------COMMENT
Over-Commented Block16 hits · 16 pts
SeverityFileLineSnippetContext
LOWmoviepy/video/VideoClip.py861 # Again to understand the math, consider the following to calculate the final maskCOMMENT
LOWmoviepy/video/VideoClip.py941 x1_clip = max(-x_start, 0)COMMENT
LOWdocs/conf.py41COMMENT
LOWdocs/conf.py61COMMENT
LOWdocs/conf.py81COMMENT
LOWdocs/conf.py141COMMENT
LOWdocs/conf.py161]COMMENT
LOWdocs/conf.py181# If false, no index is generated.COMMENT
LOWdocs/conf.py201# This is the file name suffix for HTML files (e.g. ".xhtml").COMMENT
LOWdocs/conf.py221latex_documents = [COMMENT
LOWdocs/conf.py241COMMENT
LOWdocs/conf.py301# The unique identifier of the text. This can be a ISBN numberCOMMENT
LOWdocs/conf.py321COMMENT
LOW…_static/code/user_guide/effects/modify_copy_example.py1# Import everything needed to edit video clipsCOMMENT
LOW…tic/code/getting_started/moviepy_10_minutes/trailer.py41COMMENT
LOW…tic/code/getting_started/moviepy_10_minutes/trailer.py261# Lets finish by modifying our rambo clip to make it sepiaCOMMENT
Self-Referential Comments5 hits · 15 pts
SeverityFileLineSnippetContext
MEDIUMtests/test_ffmpeg_reader.py725 # Create a random video file.COMMENT
MEDIUMtests/test_ffmpeg_reader.py774 # Create a random video file.COMMENT
MEDIUMmoviepy/video/fx/HeadBlur.py32 # Create a mask for the blur areaCOMMENT
MEDIUMmoviepy/video/fx/Painting.py45 # Create the darkening effectCOMMENT
MEDIUMdocs/_static/code/user_guide/loading/AudioArrayClip.py31# Create an AudioArrayClip from the audio samplesCOMMENT
Excessive Try-Catch Wrapping11 hits · 13 pts
SeverityFileLineSnippetContext
LOWmoviepy/config.py32 except Exception as err:CODE
LOWmoviepy/version.py5except Exception:CODE
LOWmoviepy/video/tools/subtitles.py134 except Exception:CODE
LOWmoviepy/video/tools/subtitles.py140 except Exception:CODE
MEDIUMmoviepy/video/tools/subtitles.py131def is_in_subclip(t1, t2):CODE
MEDIUMmoviepy/video/tools/subtitles.py137def try_cropping(t1, t2):CODE
LOWmoviepy/video/io/ffmpeg_reader.py523 except Exception:CODE
LOWmoviepy/video/io/ffmpeg_reader.py592 except Exception:CODE
LOWmoviepy/video/io/ffmpeg_reader.py924 except Exception as exc:CODE
LOWmoviepy/video/io/display_in_notebook.py163 except Exception:CODE
LOWdocs/_static/code/user_guide/loading/closing.py8except Exception as e:CODE
AI Structural Patterns9 hits · 9 pts
SeverityFileLineSnippetContext
LOWmoviepy/video/VideoClip.py208CODE
LOWmoviepy/video/VideoClip.py1176CODE
LOWmoviepy/video/VideoClip.py1666CODE
LOWmoviepy/video/tools/drawing.py177CODE
LOWmoviepy/video/io/ffmpeg_writer.py262CODE
LOWmoviepy/video/io/ffmpeg_writer.py85CODE
LOWmoviepy/video/io/ffmpeg_reader.py23CODE
LOWmoviepy/video/io/VideoFileClip.py91CODE
LOWmoviepy/audio/AudioClip.py184CODE
Redundant / Tautological Comments4 hits · 6 pts
SeverityFileLineSnippetContext
LOWtests/test_fx.py943 # Check if the pixel at the specified position matches the expected colorCOMMENT
LOWmoviepy/video/VideoClip.py2102 # Check if the last font size tested fits within the given width and heightCOMMENT
LOWmoviepy/video/io/ffmpeg_tools.py234 # Check if the input file existsCOMMENT
LOWmoviepy/video/io/ffmpeg_reader.py889 # Open the file in a pipe, read outputCOMMENT
AI Slop Vocabulary2 hits · 4 pts
SeverityFileLineSnippetContext
MEDIUMmoviepy/video/io/ffmpeg_reader.py275 # go to the previous integer. This makes the fetching more robust when youCOMMENT
LOWdocs/_static/code/user_guide/loading/masks.py9# To define the VideoClip as a mask, just pass parameter is_mask as TrueCOMMENT
Modern Structural Boilerplate1 hit · 1 pts
SeverityFileLineSnippetContext
LOWmoviepy/__init__.py43__all__ = [CODE
Fake / Example Data1 hit · 1 pts
SeverityFileLineSnippetContext
LOWmedia/doc_medias/example.txt1Lorem ipsumCODE