LAV Filters - Open-Source DirectShow Media Splitter and Decoders
This report summarizes scanner evidence for Nevcairiel/LAVFilters, a C++ project with 9,230 GitHub stars. SynthScan examined 190,635 lines of code across 625 source files, recording 559 pattern matches distributed across 3 syntactic categories. The legacy adjusted pattern signal is 3.0 (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? 559 finding(s).
Are imports declared and package/API names verified? 0 finding(s).
Are wrappers, guards, and repeated structures necessary? 0 finding(s).
Which changes need focused human review? 559 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 559 distinct pattern matches across 3 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 | include/LAVSplitterSettings.h | 41 | // | COMMENT |
| LOW | include/LAVSplitterSettings.h | 61 | // Set the preferred subtitle languages as ISO 639-2 language codes, comma separated | COMMENT |
| LOW | include/IKeyFrameInfo.h | 21 | #pragma once | COMMENT |
| LOW | include/LAVAudioSettings.h | 101 | { | COMMENT |
| LOW | include/ID3DVideoMemoryConfiguration.h | 1 | // ----------------------------------------------------------------- | COMMENT |
| LOW | include/ID3DVideoMemoryConfiguration.h | 21 | { | COMMENT |
| LOW | include/ID3DVideoMemoryConfiguration.h | 41 | // should be added. | COMMENT |
| LOW | include/ID3DVideoMemoryConfiguration.h | 61 | // use, otherwise the texture will be re-used by the decoder. | COMMENT |
| LOW | include/IStreamSourceControl.h | 21 | COMMENT | |
| LOW | include/IStreamSourceControl.h | 41 | // Position is in DirectShow reference time, 100ns units. | COMMENT |
| LOW | include/LAVVideoSettings.h | 221 | // | COMMENT |
| LOW | include/LAVVideoSettings.h | 241 | STDMETHOD_(DWORD, GetNumThreads)() = 0; | COMMENT |
| LOW | include/IMediaSideData.h | 1 | // ----------------------------------------------------------------- | COMMENT |
| LOW | include/IGraphRebuildDelegate.h | 21 | COMMENT | |
| LOW | include/IPinSegmentEx.h | 1 | #pragma once | COMMENT |
| LOW | decoder/LAVAudio/BitstreamMAT.cpp | 21 | COMMENT | |
| LOW | decoder/LAVAudio/LAVAudio.h | 21 | COMMENT | |
| LOW | decoder/LAVAudio/LAVAudio.h | 41 | #define PCM_BUFFER_MIN_DURATION 60000 | COMMENT |
| LOW | decoder/LAVAudio/stdafx.h | 21 | COMMENT | |
| LOW | decoder/LAVAudio/stdafx.h | 41 | { | COMMENT |
| LOW | decoder/LAVAudio/dllmain.cpp | 21 | // -------------------------------------------------------------------------------- | COMMENT |
| LOW | decoder/LAVAudio/PostProcessor.cpp | 121 | case SampleFormat_FP32: memset(pBuffer, 0, get_byte_per_sample(sfSampleFormat)); break; | COMMENT |
| LOW | decoder/LAVAudio/PostProcessor.cpp | 141 | // Note that when copying one source channel into multiple destinations, you always want to reduce its volume. | COMMENT |
| LOW | decoder/LAVAudio/resource.h | 1 | //{{NO_DEPENDENCIES}} | COMMENT |
| LOW | decoder/LAVAudio/resource.h | 21 | #define IDC_VOLUME 1039 | COMMENT |
| LOW | decoder/LAVAudio/resource.h | 41 | #define IDC_BITSTREAMING 1061 | COMMENT |
| LOW | decoder/LAVAudio/resource.h | 61 | #define IDC_LBL_OUTPUT_CHANNEL 1081 | COMMENT |
| LOW | decoder/LAVAudio/resource.h | 81 | #define IDC_DELAY 1101 | COMMENT |
| LOW | decoder/LAVAudio/resource.h | 101 | #define IDC_LBL_CENTER_LEVEL 1124 | COMMENT |
| LOW | decoder/LAVAudio/resource.h | 121 | #endif | COMMENT |
| LOW | decoder/LAVAudio/LAVAudio.cpp | 21 | #include "LAVAudio.h" | COMMENT |
| LOW | decoder/LAVAudio/LAVAudio.cpp | 41 | #pragma warning(disable : 4101) | COMMENT |
| LOW | decoder/LAVAudio/parser/dts.cpp | 21 | COMMENT | |
| LOW | decoder/LAVVideo/stdafx.h | 21 | COMMENT | |
| LOW | decoder/LAVVideo/stdafx.h | 41 | COMMENT | |
| LOW | decoder/LAVVideo/stdafx.h | 61 | #include "DShowUtil.h" | COMMENT |
| LOW | decoder/LAVVideo/dllmain.cpp | 21 | // -------------------------------------------------------------------------------- | COMMENT |
| LOW | decoder/LAVVideo/resource.h | 1 | //{{NO_DEPENDENCIES}} | COMMENT |
| LOW | decoder/LAVVideo/resource.h | 21 | #define IDC_THREADS 1005 | COMMENT |
| LOW | decoder/LAVVideo/resource.h | 41 | #define IDC_OUT_10BIT 1026 | COMMENT |
| LOW | decoder/LAVVideo/resource.h | 61 | #define IDC_DEINT_FIELDORDER 1050 | COMMENT |
| LOW | decoder/LAVVideo/resource.h | 81 | #define IDC_GROUP_HWDEINT 1072 | COMMENT |
| LOW | decoder/LAVVideo/resource.h | 101 | // | COMMENT |
| LOW | decoder/LAVVideo/LAVPixFmtConverter.cpp | 61 | LAVOutPixFmts lav_pix_fmts[LAVOutPixFmt_NB + 1]; | COMMENT |
| LOW | decoder/LAVVideo/LAVVideo.h | 21 | COMMENT | |
| LOW | decoder/LAVVideo/LAVVideo.cpp | 21 | #include "LAVVideo.h" | COMMENT |
| LOW | decoder/LAVVideo/pixconv/pixconv_sse2_templates.h | 21 | COMMENT | |
| LOW | decoder/LAVVideo/pixconv/pixconv_sse2_templates.h | 41 | COMMENT | |
| LOW | decoder/LAVVideo/pixconv/pixconv_sse2_templates.h | 61 | // dreg - register with dithering coefficients | COMMENT |
| LOW | decoder/LAVVideo/pixconv/pixconv_sse2_templates.h | 81 | // dreg - register with dithering coefficients | COMMENT |
| LOW | decoder/LAVVideo/pixconv/pixconv_sse2_templates.h | 101 | #define PIXCONV_STREAM_LOAD(reg, src) reg = _mm_stream_load_si128((__m128i *)(src)); /* load (streaming) */ | COMMENT |
| LOW | decoder/LAVVideo/decoders/msdk_mvc.h | 21 | #include "DecBase.h" | COMMENT |
| LOW | decoder/LAVVideo/decoders/avcodec.cpp | 21 | #include "avcodec.h" | COMMENT |
| LOW | decoder/LAVVideo/decoders/cuvid.h | 21 | #include "DecBase.h" | COMMENT |
| LOW | decoder/LAVVideo/decoders/dxva2dec.cpp | 21 | COMMENT | |
| LOW | decoder/LAVVideo/decoders/quicksync.cpp | 21 | #include "quicksync.h" | COMMENT |
| LOW | decoder/LAVVideo/decoders/mvc/include/mfxdefs.h | 41 | COMMENT | |
| LOW | decoder/LAVVideo/decoders/cuvid/dynlink_cuda_d3d.h | 81 | #pragma warning( disable : 4996 ) // disable deprecated warning | COMMENT |
| LOW | decoder/LAVVideo/decoders/cuvid/dynlink_nvcuvid.h | 381 | COMMENT | |
| LOW | decoder/LAVVideo/decoders/cuvid/dynlink_nvcuvid.h | 421 | //! cudaVideoState_Started - to signal the source to run and deliver data | COMMENT |
| 493 more matches not shown… | ||||
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| MEDIUM | decoder/LAVVideo/decoders/d3d11va.cpp | 708 | // Native decoding should use 16 buffers to enable seamless codec changes | COMMENT |
| MEDIUM | decoder/LAVVideo/decoders/dxva2dec.cpp | 1021 | // Native decoding should use 16 buffers to enable seamless codec changes | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | thirdparty/32/include/nettle/dsa-compat.h | 102 | * When done with the key and signature, don't forget to call | COMMENT |
| LOW | thirdparty/32/include/nettle/rsa.h | 173 | * When done with the key and signature, don't forget to call | COMMENT |
| LOW | thirdparty/64/include/nettle/dsa-compat.h | 102 | * When done with the key and signature, don't forget to call | COMMENT |
| LOW | thirdparty/64/include/nettle/rsa.h | 173 | * When done with the key and signature, don't forget to call | COMMENT |