FFmpeg Deep Audit: Comprehensive Fixes and Enhancements#39
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alokemajumder merged 1 commit intomainfrom Dec 7, 2025
Merged
FFmpeg Deep Audit: Comprehensive Fixes and Enhancements#39alokemajumder merged 1 commit intomainfrom
alokemajumder merged 1 commit intomainfrom
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Security fixes: - Aligned codec whitelists between validator and FFmpegCommandBuilder - Added professional codecs (prores, dnxhd, SVT-AV1, PCM variants) - Enhanced watermark handling with position presets and path validation Bug fixes: - Fixed atempo filter for speeds outside 0.5-2.0 range (now chains filters) - Fixed faststart flag only applied to MP4/MOV containers - Fixed subtitle handler to handle empty paths gracefully - Fixed CRF validation to allow lossless encoding (CRF 0-4) New capabilities: - Added two-pass encoding support with execute_two_pass method - Added thumbnail extraction operation (single, multiple, best, sprite modes) - Added concat operation handler (demuxer and filter modes) - Added tune parameter support (film, animation, grain, etc.) - Added H.264/H.265 level parameter support - Added reference frames, lookahead, and scene change threshold params - Added SVT-AV1 encoder selection support - Added 10-bit pixel formats (yuv420p10le, yuv422p10le, etc.) Production improvements: - Comprehensive parameter validation in validators.py - Enhanced error messages with allowed values - Resource management warnings for high-quality settings
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Summary
Comprehensive deep audit of FFmpeg API integration addressing security, bugs, gaps, and production-readiness issues.
Security Fixes
validators.pyandFFmpegCommandBuilderto prevent bypassprores,prores_ks,dnxhd,dnxhr,libsvtav1eac3,flac,pcm_s16le/s24le/s32le/f32le,libopus,libvorbis,libmp3lameBug Fixes
New Capabilities
execute_two_pass()method for optimal bitrate distributionfilm,animation,grain,stillimage,fastdecode,zerolatencyencoder: "svt"parameteryuv420p10le,yuv422p10le,yuv444p10le,p010le,nv12Production Improvements
Test Plan