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 summarizes scanner evidence for xufuji456/FFmpegAndroid, a C project with 5,894 GitHub stars. SynthScan examined 101,846 lines of code across 437 source files, recording 238 pattern matches distributed across 4 syntactic categories. The legacy adjusted pattern signal is 2.4 (Low pattern signal); it is not an authorship estimate.
Use the findings to ask whether maintainers can explain intent, verify dependencies, simplify unnecessary scaffolding, and focus review effort. Risk Payload v1 adds ownership, supply-chain, over-engineering, and review-effort vectors when available. These are prompts for human verification, not probabilities, security findings, or measured maintenance costs.
Use each vector to guide manual verification of the underlying findings.
Payload schema: 1.0.0 · Engine: 2.0.0 · Scoring: heuristic-density-v1 · Scan date: 2026-10-31.
Can maintainers explain intent, assumptions, and trade-offs? 238 finding(s).
Are imports declared and package/API names verified? 0 finding(s).
Are wrappers, guards, and repeated structures necessary? 1 finding(s).
Which changes need focused human review? 238 finding(s).
This chart tracks the legacy adjusted pattern score across scan runs. Changes can reflect source changes, scan coverage, or detector/scoring versions; they do not measure AI adoption or prove that a team refactored code. Compare runs only when their scoring versions are compatible. The dashed line tracks the raw pattern-hit count.
Groups findings by configured severity weight. Severity is not a confidence estimate, security rating, or proof that a package is missing. Verify imports against the project's manifests and inspect each finding in its local design context.
This horizontal bar chart shows where configured pattern scores accumulate across directories. Treat the bars as locations to inspect, not as evidence of authorship or code quality. Use the file-level findings to decide whether a directory needs a focused ownership, dependency, complexity, or review check.
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 detector match to inspect in context. 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 configured finding weight (CRITICAL / HIGH / MEDIUM / LOW). The Context column identifies whether the match occurred inside executable code, an inline comment, or a string literal — legacy comment-context matches receive a ×1.5 score weight. The ⚡ bolt icon marks clustered matches: three or more patterns within a 10-line window, each receiving an additional ×1.5 density multiplier under the legacy scoring model.
| 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 |