FFmpeg实现视频裁剪、水印、转码、编解码、转Gif动图;FFmpeg本地推流、H264与RTMP实时推流直播;OpenGL滤镜特效,视频拍摄。音视频学习路线,音视频知识总结、流媒体协议
This report presents the forensic synthetic code analysis of xufuji456/FFmpegAndroid, a C project with 5,815 GitHub stars. SynthScan v2.0 examined 101,842 lines of code across 437 source files, recording 238 pattern matches distributed across 4 syntactic categories. The overall adjusted score of 2.4 places this repository in the Likely human-written 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).
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.
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.
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.
The scanner identified 238 distinct pattern matches across 4 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.
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | …in/java/com/frank/ffmpeg/util/MediaFormatIdentify.java | 161 | // m4a: ftypM4A(66747970 4D3441) | COMMENT |
| LOW | …c/main/java/com/frank/ffmpeg/gif/BeautyGifEncoder.java | 961 | COMMENT | |
| LOW | …c/main/java/com/frank/ffmpeg/gif/BeautyGifEncoder.java | 1001 | // algorithm D (vol. 3, sec. 6.4) along with G. Knott's relatively-prime | COMMENT |
| LOW | …c/main/java/com/frank/ffmpeg/gif/BeautyGifEncoder.java | 1021 | // code: A n_bits-bit integer. If == -1, then EOF. This assumes | COMMENT |
| LOW | app/src/main/cpp/ff_audio_player.h | 1 | // | COMMENT |
| LOW | app/src/main/cpp/media_transcode.cpp | 1 | // | COMMENT |
| LOW | app/src/main/cpp/video_filter.c | 1 | // | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/cmdutils.h | 21 | COMMENT | |
| LOW | app/src/main/cpp/ffmpeg/cmdutils.h | 161 | #define OPT_SUBTITLE 0x0200 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/opt_common.c | 21 | #include "config.h" | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/opt_common.c | 41 | #include "libavutil/version.h" | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/ffmpeg_opt.c | 21 | #include "config.h" | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/ffmpeg_opt.c | 41 | COMMENT | |
| LOW | app/src/main/cpp/ffmpeg/ffmpeg.h | 21 | COMMENT | |
| LOW | app/src/main/cpp/ffmpeg/ffmpeg.h | 41 | #include "libavutil/dict.h" | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/ffmpeg_demux.c | 21 | COMMENT | |
| LOW | app/src/main/cpp/ffmpeg/config.h | 1 | /* Automatically generated by configure - do not modify! */ | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 21 | #else | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 41 | #define ARCH_S390 0 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 61 | #define HAVE_LDBRX 0 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 81 | #define HAVE_SSE42 0 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 101 | #define HAVE_ARMV6_EXTERNAL 0 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 121 | #define HAVE_AVX512ICL_EXTERNAL 0 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 141 | #define HAVE_MIPSDSP_EXTERNAL 0 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 161 | #define HAVE_PPC4XX_INLINE 0 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 181 | #define HAVE_XOP_INLINE 0 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 201 | #define HAVE_FAST_CMOV 0 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 221 | #define HAVE_CDIO_PARANOIA_H 0 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 241 | #define HAVE_MALLOC_H 1 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 261 | #define HAVE_CBRT 1 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 281 | #define HAVE_POWF 1 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 301 | #define HAVE_FCNTL 1 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 321 | #define HAVE_LOCALTIME_R 1 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 341 | #define HAVE_SETRLIMIT 1 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 361 | #define HAVE_AS_OBJECT_ARCH 0 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 381 | #define HAVE_KCMVIDEOCODECTYPE_HEVC 0 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 401 | #define HAVE_STRUCT_IP_MREQ_SOURCE 1 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 421 | #define HAVE_OPENCL_VAAPI_INTEL_MEDIA 0 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 441 | #define CONFIG_ENCODE_VIDEO_EXAMPLE 1 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 461 | #define CONFIG_LIBVIDSTAB 0 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 481 | #define CONFIG_GNUTLS 0 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 501 | #define CONFIG_LIBGSM 0 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 521 | #define CONFIG_LIBRIST 0 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 541 | #define CONFIG_LIBVPX 0 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 561 | #define CONFIG_LIBXCB_SHM 0 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 581 | #define CONFIG_AMF 0 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 601 | #define CONFIG_RUNTIME_CPUDETECT 1 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 621 | #define CONFIG_DCT 1 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 641 | #define CONFIG_PTX_COMPRESSION 1 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 661 | #define CONFIG_AUDIODSP 1 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 681 | #define CONFIG_FMTCONVERT 1 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 701 | #define CONFIG_INFLATE_WRAPPER 1 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 721 | #define CONFIG_MPEGVIDEOENC 1 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/config.h | 741 | #define CONFIG_STARTCODE 1 | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/ffmpeg_mux.h | 21 | #ifndef FFTOOLS_FFMPEG_MUX_H | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/ffmpeg_mux_init.c | 21 | #include <string.h> | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/ffmpeg_filter.c | 21 | #include <stdint.h> | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/ffprobe.c | 21 | /** | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/ffprobe.c | 41 | #include "libavutil/display.h" | COMMENT |
| LOW | app/src/main/cpp/ffmpeg/ffprobe.c | 61 | #include "libavfilter/version.h" | COMMENT |
| 174 more matches not shown… | ||||
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| HIGH | extra/ffmpeg/include/libavformat/avformat.h | 1245 | #define AVFMT_FLAG_AUTO_BSF 0x200000 ///< Add bitstream filters as requested by the muxer | COMMENT |
| HIGH | extra/ffmpeg/include/libavformat/avformat.h | 1245 | #define AVFMT_FLAG_AUTO_BSF 0x200000 ///< Add bitstream filters as requested by the muxer | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | extra/ffmpeg/include/libavformat/avformat.h | 1229 | #define AVFMT_FLAG_NOFILLIN 0x0010 ///< Do not infer any values from other values, just return what is stored in the | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | shell/ios/build-ffmpeg-framework.sh | 98 | function CreateModulemapAndUmbrellaHeader() { | CODE |